How to use a search operator in Gmail

  1. Go to Gmail.
  2. In the search box, type the search operator.

Search operators you can use

Tip: Once you do a search using search operators, you can use the results to set up a filter for these messages.

What you can search bySearch operator & example
Specify the sender from: Example: from:amy
Specify a recipient to: Example: to:david
Words in the subject line subject: Example: subject:dinner
Messages that match multiple terms OR or { } Example: from:amy OR from:david Example: {from:amy from:david}
Remove messages from your results - Example: dinner -movie
Find messages with words near each other. Use the number to say how many words apart the words can be  Add quotes to find messages in which the word you put first stays first. AROUND Example: dinner AROUND 5 friday Example: "secret AROUND 25 birthday"
Messages that have a certain label label: Example: label:friends
Messages that have an attachment has:attachment Example: has:attachment
Messages that have a Google Drive, Docs, Sheets, or Slides attachment or link has:drive has:document has:spreadsheet has:presentation Example: has:drive 
Messages that have a YouTube video has:youtube Example: has:youtube
Messages from a mailing list list: Example:
Attachments with a certain name or file type filename: Example: filename:pdf Example: filename:homework.txt
Search for an exact word or phrase " " Example: "dinner and movie tonight"
Group multiple search terms together ( ) Example: subject:(dinner movie)
Messages in any folder, including Spam and Trash in:anywhere Example: in:anywhere movie
Search for messages that are marked as important is:important label:important Example: is:important   
Starred, snoozed, unread, or read messages is:starred is:snoozed is:unread is:read Example: is:read is:starred
Messages that include an icon of a certain color has:yellow-star has:blue-info Example: has:purple-star
Recipients in the cc or bcc field cc: bcc: Example: cc:david Note: You can’t find messages that you received on bcc.
Search for messages sent during a certain time period after: before: older: newer: Example: after:2004/04/16 Example: before:2004/04/18
Search for messages older or newer than a time period using d (day), m (month), and y (year) older_than: newer_than: Example: newer_than:2d
Chat messages is:chat Example: is:chat movie
Search by email for delivered messages deliveredto: Example:
Messages in a certain category category: Example: category:updates
Messages larger than a certain size in bytes size: Example: size:1000000
Messages larger or smaller than a certain size in bytes larger: smaller: Example: larger:10M
Results that match a word exactly + Example: +unicorn
Messages with a certain message-id header Rfc822msgid: Example: 
Messages that have or don’t have a label has:userlabels has:nouserlabels Example: has:nouserlabels  Note: Labels are only added to a message, and not an entire conversation.

Note: When using numbers as part of your query, a space or a dash (-) will separate a number while a dot (.) will be a decimal. For example, 01.2047-100 is considered 2 numbers: 01.2047 and 100.

Hits: 90

Materialized Views


There are three ways to categorize a materialized view’s ability to be fast refreshed.

  1. It can never be fast refreshed.
  2. It can always be fast refreshed.
  3. It can be fast refreshed after certain kinds of changes to the base table but not others.

For the first case Oracle will raise an error if you try to create such a materialized view with its refresh method defaulted to REFRESH FAST. In the example below table T does not have a materialized view log on it. Materialized views based on T cannot therefore be fast refreshed. If we attempt to create such a materialized view we get an error.

create materialized view MV REFRESH FAST as select * from t2 ; as select * from t2 * ERROR at line 3: ORA-23413: table "SCOTT"."T2" does not have a materialized view log

Source: Materialized Views: REFRESH FAST Categories

Hits: 42

Using WSL and MobaXterm to Create a Linux Dev Environment on Windows — Nick Janetakis

For the last 5 years or so I’ve been using VMware’s Unity mode to seamlessly run Linux applications on Windows without having to dual boot.

Overall, it was a pretty solid set up but it had a few annoying issues. It got to the point where I woke up one day and backed up my source code and then rage uninstalled VMware followed by deleting the 100GB VM image.

There was no going back. I had to find a new solution.

Spoiler alert: This new set up is the best way I’ve come across to run both Linux and Windows together. If you’re on Windows and want to also run Linux tools (even graphical apps and Docker) you’ll learn how to set everything up by reading this article.

Source: Using WSL and MobaXterm to Create a Linux Dev Environment on Windows — Nick Janetakis

Hits: 101

Local Area Network : How to fix slow LAN transfer speed of files in Windows – HowToSolutions

Recently I had to solve a problem of a very slow transfer of files between two computers on a LAN network using Ethernet cable. Both machines had Windows 7 x64 installed and the transfer speed was ridiculously slow at 10-15kb/s. Using Task Manager under Networking tab, Network Utilization was showing only around 0.25% for Local Area Connection.

I looked around the web for solutions and found quite a few suggestions how to tackle this problem. Those that I tried and the one that finally solved my problem are discussed here.


Turning off “Remote Differential Compression”

One of the first suggestions that I came across was to turn off this Windows Feature in Windows 7.

This suggestion is common on the web but it turns out to be just a myth.

From TechNet:

This is 100% false. Neither Windows Update or file copy operations use RDC at all.

So I ignored this suggestion and continued looking.


Disabling “TCP Auto-Tuning”

This is another common suggestion that I came across and it uses NETSH command-line utility used for displaying and modifying the network configuration. To make the necessary changes, we need to run that utility as an Administrator.

  1. Open Command Prompt as Administrator:
    • Click on Start Menu
    • Type Command in search box
    • Command Prompt will show up in results. Right-click on it to open Context Menu
    • Select Run as administrator
    • If User Account Control Window shows up asking if you want to allow the following program to make changes, select Yes
  2. Type: netsh interface tcp set global autotuning=disabled
  3. Restart the computer
  4. To verify that the auto-tuning is still disabled type in Command Prompt:
    netsh interface tcp show global

This suggestion still didn’t solve my problem, so I looked further, but before doing that I wanted to set Auto-tuning back to the default value by typing netsh interface tcp set global autotuning=normal in the Command Prompt (running as an Administrator).


Disabling “Large Send Offload (LSO)”

Large Send Offload is a technique of improving network performance while at the same time reducing CPU overhead. Apparently it does not work very well, so it was suggested to disable it. If you would like to know about LSO, check this MSDN article from 2001.

LSO is an option located in a Device Manager under your network adapter, so this solution requires Administrator Privileges.

Follow these steps:

  1. Open Start Menu, right-click on Computer and select Properties
  2. Under Control Panel Home located on the left side of the window click on Device Manager
  3. You will get a list of all devices on your machine. Expand Network Adapters.
  4. Find your Network Card and double-click on it.
  5. Select Advanced tab. You will get a list filled with different options.
  6. Select Large Send Offload V2 (IPv4) and set the value to Disabled
  7. Do the same for Large Send Offload V2 (IPv6) if it is available
  8. Click OK

After clicking OK, I tried to send a file over the LAN network. The transfer speed started very slow, but it was gradually picking up speed. I decided to restart the computer and try to send that file again and this time it worked like a charm.

Now that sending of files worked as it should, I also checked speed for receiving files. It turned out that it was still slow but all I had to do to fix that was to disable Large Send Offload V2 on the other computer. Once done,  the problem was solved for receiving files as well.


In this post we examined different ways to solve slow speed on a LAN network. One of them is just a common myth, but for other two you need to have administrator privileges. I hope you found this article useful. Consider sharing it on a social networks. Comments are also welcome.

If you solved your slow LAN speed problem in a different way, let me know how and I might add that solution to the list.

netsh interface tcp show global

Source: Local Area Network : How to fix slow LAN transfer speed of files in Windows – HowToSolutions

Hits: 103

Find files by date modified in Windows

Yes finaly i instaled Windows 10

Using datemodified: in Windows File Explorer in Windows Vista, Windows 7, and Windows 8 allows you to find any files that have been modified by a date of your choice. Using this tip can be helpful for anyone who has lost a file but know when they last modified the file. Follow the steps below to get the date or date range window shown in the picture.

  1. Open the Windows File Explorer

  2. In the search box, in the top right corner of the window type datemodified:

  3. After datemodified: has been typed the “Select a date or date range” window will appear, select the date or date range for when you believe the file was last modified.

  4. Depending on the dates this search may take a few seconds to a minute to complete.

Source: Find files by date modified in Windows

Hits: 128

ZeverSolar + integration

Hello, now i worked at connect solar panels ZeverSolar with service. Best information I found here:

The Zevercloud auto uploader retrieves power data from your Zevercloud account and automates the data upload to PVOutput every 20 minutes. Energy data is calculated from power readings.

The Plant Key can be obtained by logging into your zevercloud account at Test your settings by open the following URL:<API Key>

The App Key and App Secretis provided by Zevercloud support.

PVOutput Integration Service

The PVOutput Integration Service allows PV logging (Generation) and energy monitoring (Consumption) data to be collected and uploaded to

The following monitoring log file formats are supported:

  • aurora
  • xantrex
  • solarlog
  • growatt
  • suntellite
  • currentcost
  • flukso
  • sunnyroo
  • ted5000
  • enphase
  • enasolar
  • csv
  • powerwall

Here is the API documentation for ZeverCloud:
Look down at example the first attempt with strings set to “1”, later one is after changing it to “2”.

2017-07-30 07:55:29: Severity 3, Configfile is: eversolar.ini
2017-07-30 07:55:29: Severity 3, Checking database
2017-07-30 07:55:29: Severity 1, Connecting to the ethernet to serial converter
2017-07-30 07:55:29: Severity 1, Connected to the ethernet to serial converter
2017-07-30 07:55:39: Severity 2, Asking all inverters to re-register
2017-07-30 08:12:21: Severity 3, Configfile is: eversolar.ini
2017-07-30 08:12:21: Severity 3, Checking database
2017-07-30 08:12:21: Severity 1, Connecting to the ethernet to serial converter
2017-07-30 08:12:21: Severity 1, Connected to the ethernet to serial converter
2017-07-30 08:12:31: Severity 2, Asking all inverters to re-register

Sending such request to inverter wget -qO- results in response as follows:

09:28 30/07/2017

where line:

 1,2 - unknown
 3 - Registry ID
 4 - Registry Key
 5 - Hardware Version
 6 - Software version
 7 - Time
 8 - Communication status with ZeverCloud
 9 - unknown
 10 - SN.
 11 - Pac(W)
 12 - E_Today(KWh)
 13 - Status
 14 - unknown

Information is refreshed every 30s.

Hits: 622

“A Guide to Becoming a Full-Stack Developer in 2017”

Being a Full-Stack Developer doesn’t mean that you have necessarily mastered everything required to work with the front-end or back-end, but it means that you are able to work on both sides and understand what is going on when building an application.

Full-Stack Web Development, according to the Stack Overflow 2016 Developer Survey, is the most popular developer occupation today. It’s no wonder then that there are dozens of online and in-person programs that will help people become Full-Stack Developers and then even assist these new developers land high-paying programming jobs.

Some popular online programs can be found on Lynda, Udacity, Coursera, Thinkful, General Assembly, and so much more. Aside from these online programs, there are also in-person coding bootcamps that are teaching people the skills required to become web developers.

In this article I won’t be discussing which websites or coding bootcamps have the best web development programs, instead I will be providing a definitive guide to what I believe are the most important skills required to become a Full-Stack Web Developer today and land a job if you’ve never coded before. I will be basing the list off of three things:

  1. A combination of what most programs in 2017 are teaching students.
  2. My own personal experiences from interviewing at companies for developer positions in the past and also interviewing potential candidates for current Full-Stack Developer positions at my current company.
  3. Stories and feedback from people on Coderbyte who have been accepted to coding bootcamps and then proceeded to get programming jobs (see below).


“A Guide to Becoming a Full-Stack Developer in 2017” @borowskidaniel

Hits: 23

Code Like a Pythonista: Idiomatic Python

Dictionary and Iterators

Dictionaries implement a sq_contains slot that implements the same test as the has_key() method. This means that we can write

if k in dict: ...
which is equivalent to
if dict.has_key(k): ...

Dictionaries implement a tp_iter slot that returns an efficient iterator that iterates over the keys of the dictionary. During such an iteration, the dictionary should not be modified, except that setting the value for an existing key is allowed (deletions or additions are not, nor is the update() method). This means that we can write

    for k in dict: ...

which is equivalent to, but much faster than

for k in dict.keys(): ...

as long as the restriction on modifications to the dictionary (either by the loop or by another thread) are not violated.

Add methods to dictionaries that return different kinds of iterators explicitly:

for key in dict.iterkeys(): ...
for value in dict.itervalues(): ...
for key, value in dict.iteritems(): ...

This means that for x in dict is shorthand for for x in dict.iterkeys().

Other mappings, if they support iterators at all, should also iterate over the keys. However, this should not be taken as an absolute rule; specific applications may have different requirements.

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren’t special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.

navs = {} for (portfolio, equity, position) in data: navs.setdefault(portfolio, 0) navs[portfolio] += position * prices[equity]


Hits: 42

React continues to dominate the front-end landscape

“React continues to dominate the front-end landscape, and 2017 provided one of the most anticipated releases yet with version 16. It includes the fiber architecture which enables asynchronous UI rendering. This release also makes it much easier to manage unexpected application failures by providing error boundaries along with many other features.”


Hits: 10

SQL owa_util.get_procedure and $$PLSQL_UNIT

In 10g and 11g I use the “owa_util.get_procedure” function. I normally use this in packages as it will also return the name of an internal procedure or function as part of the package name, i.e. (package_name).(procedure name). I use this to provide a generic EXCEPTION template for identifying where an exception occured.

CREATE OR REPLACE procedure some_procedure is
    v_procedure_name varchar2(32);
    v_procedure_name := owa_util.get_procedure;

    FUNCTION v_function_name
    FUNCTION v_function_name
            DBMS_OUTPUT.PUT_LINE('ERROR IN '||owa_util.get_procedure);


alter session set plscope_settings='identifiers:all'
Session altered.

SQL> set serverout on

SQL> create or replace package pkg
   procedure p1;

   procedure p2;
end pkg;
Package created.

SQL> create or replace package body pkg
   procedure get_scope (obj varchar2, line int)
      for c in (select rpad (lpad (' ', 2 * (level - 1)) || name, 20, '.') || ' ' || rpad (type, 20) || rpad (usage, 20) identifier_usage_contexts
                from user_identifiers t
                where level != 1
                start with line = get_scope.line and object_name = obj
                connect by usage_id = prior usage_context_id)
         dbms_output.put_line (c.identifier_usage_contexts);
      end loop;
   end get_scope;

   procedure p1
   end p1;

   procedure p2
      get_scope ($$plsql_unit, $$plsql_line);
   end p2;
end pkg;

Return information about witch module call this code.

    FN_WHO_AM_I returns the full ORACLE name of your object including schema and package names
    FN_WHO_AM_I(0) - returns the name of your object
    FN_WHO_AM_I(1) - returns the name of calling object
    FN_WHO_AM_I(2) - returns the name of object, who called calling object
    etc., etc., etc.... Up to to he highest level
    Copyrigth GARBUYA 2010
    TYPE str_varr_t IS VARRAY (2) OF CHAR (1);

    TYPE str_table_t IS TABLE OF VARCHAR2 (256);

    TYPE num_table_t IS TABLE OF NUMBER;

    v_stack        VARCHAR2 (2048) DEFAULT UPPER (DBMS_UTILITY.format_call_stack);
    v_tmp_1        VARCHAR2 (1024);
    v_tmp_2        VARCHAR2 (1024);
    v_pkg_name     VARCHAR2 (32);
    v_obj_type     VARCHAR2 (32);
    v_owner        VARCHAR2 (32);
    v_idx          NUMBER := 0;
    v_pos1         NUMBER := 0;
    v_pos2         NUMBER := 0;
    v_line_nbr     NUMBER := 0;
    v_blk_cnt      NUMBER := 0;
    v_str_len      NUMBER := 0;
    v_bgn_cnt      NUMBER := 0;
    v_end_cnt      NUMBER := 0;
    it_is_comment  BOOLEAN := FALSE;
    it_is_literal  BOOLEAN := FALSE;
    v_literal_arr  str_varr_t := str_varr_t ('''', '"');
    v_blk_bgn_tbl  str_table_t
                       := str_table_t (' IF '
                                      ,' LOOP '
                                      ,' CASE '
                                      ,' BEGIN ');
    v_tbl          str_table_t := str_table_t ();
    v_blk_bgn_len_tbl num_table_t := num_table_t ();
    v_stack     := SUBSTR (v_stack, INSTR (v_stack, CHR (10), INSTR (v_stack, 'FN_WHO_AM_I')) + 1) || 'ORACLE'; -- skip myself

    FOR v_pos2 IN 1 .. p_lvl LOOP -- advance to the input level
        v_pos1      := INSTR (v_stack, CHR (10));
        v_stack     := SUBSTR (v_stack, INSTR (v_stack, CHR (10)) + 1);

    v_pos1      := INSTR (v_stack, CHR (10));

    IF v_pos1 = 0 THEN
        RETURN (v_stack);
    END IF;

    v_stack     := SUBSTR (v_stack, 1, v_pos1 - 1); -- get only current level
    v_stack     := TRIM (SUBSTR (v_stack, INSTR (v_stack, ' '))); -- cut object handle
    v_line_nbr  := TO_NUMBER (SUBSTR (v_stack, 1, INSTR (v_stack, ' ') - 1)); -- get line number
    v_stack     := TRIM (SUBSTR (v_stack, INSTR (v_stack, ' '))); -- cut line number
    v_pos1      := INSTR (v_stack, ' BODY');

    IF v_pos1 = 0 THEN
        RETURN (v_stack);
    END IF;

    v_pos1      := INSTR (v_stack, ' ', v_pos1 + 2); -- find end of object type
    v_obj_type  := SUBSTR (v_stack, 1, v_pos1 - 1); -- get object type
    v_stack     := TRIM (SUBSTR (v_stack, v_pos1 + 1)); -- get package name
    v_pos1      := INSTR (v_stack, '.');
    v_owner     := SUBSTR (v_stack, 1, v_pos1 - 1); -- get owner
    v_pkg_name  := SUBSTR (v_stack, v_pos1 + 1); -- get package name
    v_blk_cnt   := 0;
    it_is_literal := FALSE;

    FOR v_idx IN v_blk_bgn_tbl.FIRST .. v_blk_bgn_tbl.LAST LOOP
        v_blk_bgn_len_tbl.EXTEND (1);
        v_blk_bgn_len_tbl (v_blk_bgn_len_tbl.LAST) := LENGTH (v_blk_bgn_tbl (v_idx));

    FOR src IN (
                   SELECT ' ' || REPLACE (TRANSLATE (UPPER (text), ';(' || CHR (10), '   '), '''''', ' ') || ' ' text
                   FROM all_source
                   WHERE     owner = v_owner
                         AND name = v_pkg_name
                         AND TYPE = v_obj_type
                         AND line < v_line_nbr
                   ORDER BY line
               ) LOOP
        v_stack     := src.text;

        IF it_is_comment THEN
            v_pos1      := INSTR (v_stack, '*/');

            IF v_pos1 > 0 THEN
                v_stack     := SUBSTR (v_stack, v_pos1 + 2);
                it_is_comment := FALSE;
                v_stack     := ' ';
            END IF;
        END IF;

        IF v_stack != ' ' THEN
            v_pos1      := INSTR (v_stack, '/*');

            WHILE v_pos1 > 0 LOOP
                v_tmp_1     := SUBSTR (v_stack, 1, v_pos1 - 1);
                v_pos2      := INSTR (v_stack, '*/');

                IF v_pos2 > 0 THEN
                    v_tmp_2     := SUBSTR (v_stack, v_pos2 + 2);
                    v_stack     := v_tmp_1 || v_tmp_2;
                    v_stack     := v_tmp_1;
                    it_is_comment := TRUE;
                END IF;

                v_pos1      := INSTR (v_stack, '/*');
            END LOOP;

            IF v_stack != ' ' THEN
                v_pos1      := INSTR (v_stack, '--');

                IF v_pos1 > 0 THEN
                    v_stack     := SUBSTR (v_stack, 1, v_pos1 - 1);
                END IF;

                IF v_stack != ' ' THEN
                    FOR v_idx IN v_literal_arr.FIRST .. v_literal_arr.LAST LOOP
                        v_pos1      := INSTR (v_stack, v_literal_arr (v_idx));

                        WHILE v_pos1 > 0 LOOP
                            v_pos2      := INSTR (v_stack, v_literal_arr (v_idx), v_pos1 + 1);

                            IF v_pos2 > 0 THEN
                                v_tmp_1     := SUBSTR (v_stack, 1, v_pos1 - 1);
                                v_tmp_2     := SUBSTR (v_stack, v_pos2 + 1);
                                v_stack     := v_tmp_1 || v_tmp_2;
                                IF it_is_literal THEN
                                    v_stack     := SUBSTR (v_stack, v_pos1 + 1);
                                    it_is_literal := FALSE;
                                    v_stack     := SUBSTR (v_stack, 1, v_pos1 - 1);
                                    it_is_literal := TRUE;
                                END IF;
                            END IF;

                            v_pos1      := INSTR (v_stack, v_literal_arr (v_idx));
                        END LOOP;
                    END LOOP;

                    IF v_stack != ' ' THEN
                        WHILE INSTR (v_stack, '  ') > 0 LOOP
                            v_stack     := REPLACE (v_stack, '  ', ' ');
                        END LOOP;

                        v_stack     := REPLACE (v_stack, ' END IF ', ' END ');
                        v_stack     := REPLACE (v_stack, ' END LOOP ', ' END ');

                        IF v_stack != ' ' THEN
                            v_stack     := ' ' || v_stack;
                            v_pos1      := INSTR (v_stack, ' FUNCTION ') + INSTR (v_stack, ' PROCEDURE ');

                            IF v_pos1 > 0 THEN
                                v_obj_type  := TRIM (SUBSTR (v_stack, v_pos1 + 1, 9)); -- get object type
                                v_stack     := TRIM (SUBSTR (v_stack, v_pos1 + 10)) || '  '; -- cut object type
                                v_stack     := SUBSTR (v_stack, 1, INSTR (v_stack, ' ') - 1); -- get object name
                                v_tbl.EXTEND (1);
                                v_tbl (v_tbl.LAST) := v_obj_type || ' ' || v_owner || '.' || v_pkg_name || '.' || v_stack;
                            END IF;

                            v_pos1      := 0;
                            v_pos2      := 0;
                            v_tmp_1     := v_stack;
                            v_tmp_2     := v_stack;

                            FOR v_idx IN v_blk_bgn_tbl.FIRST .. v_blk_bgn_tbl.LAST LOOP
                                v_str_len   := NVL (LENGTH (v_tmp_1), 0);
                                v_tmp_1     := REPLACE (v_tmp_1, v_blk_bgn_tbl (v_idx), NULL);
                                v_bgn_cnt   := NVL (LENGTH (v_tmp_1), 0);
                                v_pos1      := v_pos1 + (v_str_len - v_bgn_cnt) / v_blk_bgn_len_tbl (v_idx);
                                v_str_len   := NVL (LENGTH (v_tmp_2), 0);
                                v_tmp_2     := REPLACE (v_tmp_2, ' END ', NULL);
                                v_end_cnt   := NVL (LENGTH (v_tmp_2), 0);
                                v_pos2      := v_pos2 + (v_str_len - v_end_cnt) / 5; --- 5 is the length(' END ')
                            END LOOP;

                            IF v_pos1 > v_pos2 THEN
                                v_blk_cnt   := v_blk_cnt + 1;
                            ELSIF v_pos1 < v_pos2 THEN
                                v_blk_cnt   := v_blk_cnt - 1;

                                IF     v_blk_cnt = 0
                                   AND v_tbl.COUNT > 0 THEN
                                    v_tbl.DELETE (v_tbl.LAST);
                                END IF;
                            END IF;
                        END IF;
                    END IF;
                END IF;
            END IF;
        END IF;

               WHEN 0 THEN
                   v_tbl (v_tbl.LAST)

Show errors;

Other good example use new features Oracle 10g

	local_exception EXCEPTION;
	FUNCTION nested_local_function
		retval BOOLEAN := FALSE;
	RAISE local_exception;
	RETURN retval;
IF nested_local_function THEN
	dbms_output.put_line('No raised exception');
WHEN others THEN
This script produces the following output:
----- PL/SQL Call Stack -----
object line object
handle number
20909240 18 anonymous block
ORA-06512: at line 7
ORA-06512: at line 11
ORA-06510: PL/SQL: unhandled user-defined exception

Hits: 586


Here we are common problem in PLSQL. We try find answer for one common question in programing databases. Is the specyfic record exist in other table or not exist? Some examples below show how to menage this problem:

    WHILE_VAR CHAR := 'Y';


  when no_data_found then 
  	-- here some code when data ont exist


In line 11 and 14 we have place to insert own code. Other solution we found when we use define explicit cursor:

Explicit Cursor Used to Fetch Just One Value
CURSOR c IS SELECT ename FROM emp WHERE emp_id = f_get_name.ip_emp_id;
lv_ename emp.ename%TYPE;
  OPEN c;
  FETCH c INTO lv_ename;
  FETCH c INTO lv_ename;
  CLOSE c;
  RETURN lv_ename;

Explicit Cursors and Bulk Processing
l_prod prod_array;
  SELECT product
    FROM listed_products@some_remote_site;
  FOR i IN 1 .. l_csi.COUNT
     /* ... do some procedural code here that cannot be done in SQL to l_csi(i) ... */
  FORALL i IN 1 .. l_csi.COUNT
    INSERT INTO store_products (product) VALUES (l_prod(i));

REF Cursors in Brief

Though there are two other sections in this chapter that cover REF cursors more fully (“Static REF Cursors” and “Dynamic REF Cursors”), a brief overview regarding these types of cursors warrants mention in this section due to their structure: they must be explicitly opened, fetched from, and closed. If you are returning a result set to a client, a great way to avoid lots of repetitive code is to use a REF cursor. Essentially, the cursor you open usually depends on what input you receive from the requesting client. Listing 10-4 provides a brief example of a REF cursor scenario in PL/SQL:

REF Cursors Work Dynamically, But Are Declared

prod_cursor sys_refcursor;
	IF ( input_param = 'C' )
		OPEN prod_cursor FOR
		SELECT * FROM prod_concepts
			WHERE concept_type = 'COLLATERAL'
				AND concept_dt < TO_DATE( '01-JAN-2003', 'DD-MON-YYYY');
		OPEN prod_cursor FOR
		SELECT * FROM prod_concepts
			WHERE concept_category = 'ADVERTISING';

A Select … Into Cursor vs. a For … In Cursor
    FOR x IN (SELECT * FROM dual) LOOP ... END LOOP;
	OPEN c;
		CLOSE c;
		SELECT *INTO ...FROM dual;
		l_rec dual%ROWTYPE;
	OPEN c;
	FETCH c INTO l_rec;
	FETCH c INTO l_rec;


Hits: 6

sql – Search for a particular string in Oracle clob column

Example use string in Oracle CLOB column

create table aTable(
      id number,
      aClobColumn  clob

insert into aTable values (1,'value' );
insert into aTable values (1,'values are like this' );

select * from aTable where dbms_lob.substr( aClobColumn , 4000, 1 )='value';


select * from my_table where dbms_lob.instr(product_details,'NEW.PRODUCT_NO')>=1

SQL VARCHAR2 Functions and Operators on LOBs

Source: sql – Search for a particular string in Oracle clob column – Stack Overflow

Convert string to CLOB

   c1 clob := to_clob('abc');
   c2 clob;
      case c1
          when to_clob('abc') then dbms_output.put_line('abc');
          when to_clob('def') then dbms_output.put_line('def');
      end case;

      c2 := case c1
        when to_clob('abc') then 'abc'
         when to_clob('def') then 'def'

Hits: 531

Oracle 10gR2+ conditional PL/SQL Compilation


Example 1
create or replace procedure p
  $IF $$debug_code
    dbms_output.put_line( 'Our debug code' );
    dbms_output.put_line( 'Would go here' );
  dbms_output.put_line( 'And our real code here' );

alter procedure P compile
plsql_ccflags = 'debug_code:true' reuse settings

Example 2
create or replace procedure p2
 $if $$plsql_debug
    $error 'This program must be compiled with PLSQL_DEBUG disabled' $end
 dbms_output.put_line( 'This is where it happens!' );
Procedure created
alter procedure p2 compile
Warning: Procedure altered with compilation errors.
show err
Errors for PROCEDURE P2:
-------- -----------------------------------------------------------------
6/5      PLS-00179: $ERROR: This program must be compiled with PLSQL_DEBUG


  2. Oracle 10gR2 – Conditional PL/SQL Compilation – AMIS Oracle and Java Blog

Hits: 13

Alternative way monitoring Zabbix via PHP API

Purpose create this project

Display: alarms, warnings from Zabbix on PHP page. In this case I had to show some information about my services on independent web page.

Set enviroment for Zabbix PHP API

What you need to start:

  1. Zabbix API 2+ – doc:, download:
  2. Apache 2.4+
  3. PHP 7+
  4. Bootstap 3+
  5. I have defined some alarms in Zabbix and I want to observe it in “application”. Just use and
  6. Fronted i use Bootstrap and some additional lib’s it is good effective way to make it simple an easy.
  7. Git (Btubucket, Github)

Work set

Zabbix PHP API

PhpZabbixApi is an open-source PHP class library to communicate with the Zabbix™ JSON-RPC API. Because PhpZabbixApi is generated directly from the origin Zabbix™ 2.0 PHP front-end source code / files, each real Zabbix™ JSON-RPC API method is implemented (hard-coded) directly as an own PHP method. This means PhpZabbixApi is IDE-friendly, because you’ve a PHP method for each API method, and there are no PHP magic functions or alike.


Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.

Source code on Bitbucket

 * ZabbixAPI_class.php Copyright 2017 by Karol Preiskorn
 * @version 18.03.2017 21:35:17 Karol Preiskorn Init
 * @version 19.03.2017 16:37:59 KPreiskorn ZabbixAPI_class.php Export to BB
require_once 'PhpZabbixApi-2.4.5/build/ZabbixApi.class.php';
include 'header.php';

use ZabbixApi\ZabbixApi;

 * @todo add LDAP via uptime
 * @var string $uri

$uri = "http://zabixx";
$username = "user";
$password = "pass";

// set passwords and uri
include "passwords.php";

 * poor print_r function
 * @param unknown $val
function print_r2($val)
    echo '<pre>';
    echo '</pre>';

 * Better print_r function
function obsafe_print_r($var, $return = false, $html = true, $level = 0)
    $spaces = "";
    $space = $html ? " " : " ";
    $newline = $html ? "<br />" : "\n";
    for ($i = 1; $i <= 6; $i ++) {
        $spaces .= $space;
    $tabs = $spaces;
    for ($i = 1; $i <= $level; $i ++) {
        $tabs .= $spaces;
    if (is_array($var)) {
        $title = "Array";
    } elseif (is_object($var)) {
        $title = get_class($var) . " Object";
    $output = "<b>" . $title . "</b>" . $newline . $newline;
    foreach ($var as $key => $value) {
        if (is_array($value) || is_object($value)) {
            $level ++;
            $value = obsafe_print_r($value, true, $html, $level);
            $level --;
        $output .= $tabs . "[" . $key . "] => [" . $value . "]" . $newline;
    if ($return)
        return $output;
        echo "<pre>" . $output . "</pre>";

 * Generate bootstrap table with headers and coun of elements
 * @param string $title
 * @param unknown $count
 * @param unknown $id
function print_table_header($title, $count, $headers, $id)
    print('<div class="panel panel-default">' . "\n");
    print('<div class="panel-heading">' . $title . ' <a href="#"> <span class="badge">' . $count . '</span></a></div>' . "\n");
    print("<table id='" . $id . "' class='table table-striped table-bordered'>" . "\n");

    print("<thead><tr>" . "\n");
    foreach ($headers as $header) {
        print("<th>" . $header . "</th>" . "\n");
    print("</tr>\n</thead>\n<tbody>" . "\n");

try {
    // connect to Zabbix API
    $api = new ZabbixApi($uri, $username, $password);

    // get all graphs
    $alerts = $api->alertGet();
    // print_r2 ( $graphs [0] );


    $headers = array(
        "Alert Id",
        "Event Id",
        "Date time",
        "Sent to",

    print_table_header('Alerts', count($alerts), $headers, 'alarms');

    // print all alerts
    foreach ($alerts as $alert) {
        if ($alert->sendto != "") {
            if (strpos($alert->subject, "PROBLEM:") !== false) {
                $alerttype = "class='warning'";
            } else {
                $alerttype = "class='normal'";
            if (preg_match("/Original event ID: ([0-9]{4,12})/", $alert->message, $regs)) {
                $eventid_org = "[link: <a href='#" . $regs[1] . "'>" . $regs[1] . "</a>]";
            } else {
                $eventid_org = "Not found Original event ID";
            printf("<tr id='%s' %s><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td></tr>" . "\n", $alert->eventid, $alerttype, $alert->alertid, $alert->eventid, date("Y-m-d h:i", $alert->clock), $alert->sendto, $alert->subject, $alert->message . " " . $eventid_org);

    // get all graphs
    $graphs = $api->graphGet();
    $header_graph = array(
        "Graph Id",
    print_table_header('Graph', count($graphs), $header_graph, 'graph');

    // print all graph IDs
    foreach ($graphs as $graph) {
        printf("<tr><td>%8d</td><td>%s</td></tr>\n", $graph->graphid, $graph->name);

    print('<div class="panel-footer">

        <p>© T-Mobile Polska Company | OSS development powered by Karol Preiskorn | internal use</p>

    print("</div></body></html>"); // end of container

    // print "<h1>Alerts... agian in raw</h2>";
                                       // obsafe_print_r ( $alerts, FALSE, TRUE );
} catch (Exception $e) {
    // Exception in ZabbixApi catched
    echo $e->getMessage();

 * HTML 5
<!DOCTYPE html>

<link rel="stylesheet" type="text/css"
	href="" />
<script type="text/javascript"

$(document).ready(function() {
    $('#alarms').DataTable( {
        deferRender:    true,
        scrollY:        400,
        scrollCollapse: false,
        scroller:       false
    } );
} );

$(document).ready(function() {
        deferRender:    true,
        scrollY:        400,
        scrollCollapse: false,
        scroller:       false
    } );
} );


	<div class="container">
		<div class="jumbotron">
			<h1>Zabbix Alarm monitoring</h1>
			<p>Aplikacja monitoruje alarmy z Zabbix.</p>

			<a class="btn btn-primary btn-lg"
				role="button">Zabbix Dashboard</a> <a class="btn btn-lg"
				href="#alarms" role="button">Alarms</a> <a class="btn btn-lg"
				href="#graph" role="button">Graph</a> <a class="btn btn-lg"
				href="simple-json.php" role="button">Simple JSON</a>

			<button class="btn btn-primary" type="button" data-toggle="collapse"
				data-target="#collapseExample" aria-expanded="false"

			<div class="collapse" id="collapseExample">
				<div class="well">Aplikacja monitoruje alarmy z OSS Zabbix na
					serwerze wrex. Dost�p do API poprzez klas� PHP -> ZabbixApi. Opis



 * Zabbix monitoring in PHP
 * @author Karol Preiskorn
 * @version 2017-04-16 KP init
 * @version 17.03.2017 14:47:16 Karol Preiskorn dodanie informacji na temat Alert�w
 * @version 17.03.2017 18:07:38 Karol Preiskorn - dodanie synchronizacji
 * @version 9 gru 2017 12:47:16 KPreiskorn simple-json.php add composer and manage password
 * phpinfo ();
$uri = "http://zabixx";
$username = "user";
$password = "pass";

// set passwords and uri
include "passwords.php";
 * @param unknown $in
 * @param number $indent
 * @param string $from_array
 * @return string
function json_readable_encode($in, $indent = 0, $from_array = true) {
	$_myself = __FUNCTION__;
	$_escape = function ($str) {
		return preg_replace ( "!([\b\t\n\r\f\"\\'])!", "\\\\\\1", $str );

	$out = '';

	foreach ( $in as $key => $value ) {
		$out .= str_repeat ( "\t", $indent + 1 );
		$out .= "\"" . $_escape ( ( string ) $key ) . "\": ";

		if (is_object ( $value ) || is_array ( $value )) {
			$out .= "\n";
			$out .= $_myself ( $value, $indent + 1 );
		} elseif (is_bool ( $value )) {
			$out .= $value ? 'true' : 'false';
		} elseif (is_null ( $value )) {
			$out .= 'null';
		} elseif (is_string ( $value )) {
			$out .= "\"" . $_escape ( $value ) . "\"";
		} else {
			$out .= $value;

		$out .= ",\n";

	if (! empty ( $out )) {
		$out = substr ( $out, 0, - 2 );

	$out = str_repeat ( "\t", $indent ) . "{\n" . $out;
	$out .= "\n" . str_repeat ( "\t", $indent ) . "}";

	return $out;

 * @param unknown $array
function expand_arr($array) {
	foreach ( $array as $key => $value ) {
		if (is_array ( $value )) {
			echo "<i>" . $key . "</i>:<br>";
			expand_arr ( $value );
			echo "<br>\n";
		} else {
			echo "<i>" . $key . "</i>: " . $value . "<br>\n";
 * @param unknown $uri
 * @param unknown $data
 * @return mixed
function json_request($uri, $data) {
	$json_data = json_encode ( $data );
	$c = curl_init ();
	curl_setopt ( $c, CURLOPT_URL, $uri );
	curl_setopt ( $c, CURLOPT_CUSTOMREQUEST, "POST" );
	curl_setopt ( $c, CURLOPT_RETURNTRANSFER, true );
	curl_setopt ( $c, CURLOPT_POST, $json_data );
	curl_setopt ( $c, CURLOPT_POSTFIELDS, $json_data );
	curl_setopt ( $c, CURLOPT_HTTPHEADER, array (
			'Content-Type: application/json',
			'Content-Length: ' . strlen ( $json_data )
	) );
	curl_setopt ( $c, CURLOPT_SSL_VERIFYPEER, false );
	$result = curl_exec ( $c );

	echo "<b>JSON Request:</b><br>\n";
	echo $json_data . "<br><br>\n";

	echo "<b>JSON Answer:</b><br>\n";
	echo $result . "<br><br>\n";

	 * echo "<b>CURL Debug Info:</b><br>\n";
	 * $debug = curl_getinfo ( $c );
	 * echo expand_arr ( $debug ) . "<br><hr>\n";

	return json_decode ( $result, true );
 * @param unknown $uri
 * @param unknown $username
 * @param unknown $password
 * @return unknown
function zabbix_auth($uri, $username, $password) {
	$data = array (
			'jsonrpc' => "2.0",
			'method' => "user.login",
			'params' => array (
					'user' => $username,
					'password' => $password
			'id' => "1"
	$response = json_request ( $uri, $data );
	return $response ['result'];

 * @param unknown $uri
 * @param unknown $authtoken
 * @return unknown
function zabbix_get_hostgroups($uri, $authtoken) {
	$data = array (
			'jsonrpc' => "2.0",
			'method' => "hostgroup.get",
			'params' => array (
					'output' => "extend",
					'sortfield' => "name"
			'id' => "2",
			'auth' => $authtoken
	$response = json_request ( $uri, $data );
	return $response ['result'];
 * @param unknown $uri
 * @param unknown $authtoken
function zabbix_get_alert($uri, $authtoken) {
	$data = array (
			"jsonrpc" => "2.0",
			"method" => "alert.get",
			"params" => array (
					"output" => "extend",
					"actionids" => "3"
			"auth" => $authtoken,
			"id" => 1
	$response = json_request ( $uri, $data );
	return $response ['result'];

 * @var Ambiguous $authtoken
print "<h1>Auth</h1>";
$authtoken = zabbix_auth ( $uri, $username, $password );

print "<h1>HostGrups</h1>";
expand_arr ( zabbix_get_hostgroups ( $uri, $authtoken ) );
print "<h2>json_readable_encode</h2>";
json_readable_encode ( zabbix_get_hostgroups ( $uri, $authtoken ) );
print "<h1>Alerts</h1>";
expand_arr ( zabbix_get_alert ( $uri, $authtoken ) );

Hits: 685

How to make webservices Java, Tomcat, Metro and Eclipse


It is about impelemtation webserwices on Tomcat in Java (Metro, Ant)

Creating the Service Provider Environment


These series of articles require the following software to be installed on your system:

  1. JDK,
  2. Apache Ant 1.6.5 or later, Apache Ant is a Java library and command-line tool whose mission is to drive processes described in build files as targets and extension points dependent upon each other. The main known usage of Ant is the build of Java applications. Ant supplies a number of built-in tasks allowing to compile, assemble, test and run Java applications. Ant can also be used effectively to build non Java applications, for instance C or C++ applications. More generally, Ant can be used to pilot any type of process which can be described in terms of targets and tasks… for example deploy webserwices…
  3. web container: either Glassfish v3.x or Apache Tomcat 7.0+
    1. http://localhost:8080 – console
  1. programming webserwices engine
    1. Metro Standalone Budle 2.x (in case of using Apache Tomcat as a web container)
      1. Metro
    2. – other way to build webserwices in Eclipse
    5. – Eclipse WS tool
      1. Eclipse Web Services Explorer tool

How to prepare webserwis from WSDL

Set Tomcat

Assuming Java (JDK + JRE) is installed in your system, do the following steps:

  1. Install Tomcat7
  2. Copy ‘tools.jar’ from ‘C:\Program Files (x86)\Java\jdk1.6.0_27\lib’ and paste it under ‘C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\lib’.
  3. Setup paths in your Environment Variables as shown below:

C:>echo %path%

C:\Program Files (x86)\Java\jdk1.6.0_27\bin;%CATALINA_HOME%\bin;

C:>echo %classpath%

C:\Program Files (x86)\Java\jdk1.6.0_27\lib\tools.jar;
C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\lib\servlet-api.jar;


C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0;

C:>echo %JAVA_HOME%

C:\Program Files (x86)\Java\jdk1.6.0_27;

Now you can test whether Tomcat is setup correctly, by typing the following commands in your command prompt:

C:/>javap javax.servlet.ServletException
C:/>javap javax.servlet.http.HttpServletRequest

It should show a bunch of classes

Now start Tomcat service by double clicking on ‘Tomcat7.exe‘ under ‘C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\bin’.


INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path:

60down voteaccepted

It means exactly what it says: “The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path”

The library referred to is bundled into an OS specific dll (tcnative-1.dll) loaded via JNI. It allows tomcat to use OS functionalities not provided in the Java Runtime (such as sendfile, epoll, OpenSSL, system status, etc.). Tomcat will run just fine without it, but for some use cases, it will be faster with the native libraries.

If you really want it, download the tcnative-1.dll (or for Linux) and put it in the bin folder, and add a system property to the launch configuration of the tomcat server in eclipse.


Set Metro

Again, the top-level directory of the Tomcat installation is passed as an argument to the ant command. To shutdown Tomcat, change directories, invoke ant, and restart Tomcat by executing these commands: stop
ant -Dtomcat.home=<TOMCAT_INSTALL_DIR> -f <METRO_INSTALL_DIR>/metro-on-tomcat.xml install start

Other Tutorials


Hits: 0

Java wariacje z ciągiem Fibonacciego


Utwórz rekurencyjna metode obliczajaca ciag Fibonacciego, zdefiniowany dla elementu fibonacci(n) jako sume fibonacci(n-1) + fibonacci(n-2) przy załozeniu, ze fibonacci(1) i fibonacci(2) maja odpowiednio wartosci 1 i 2.

Ciąg Fibonaciego

In mathematics, the Fibonacci numbers are the numbers in the following integer sequence, called the Fibonacci sequence, and characterized by the fact that every number after the first two is the sum of the two preceding ones:[1][2]

1 , 1 , 2 , 3 , 5 , 8 , 13 , 21 , 34 , 55 , 89 , 144 , …

Often, especially in modern usage, the sequence is extended by one more initial term:

0 , 1 , 1 , 2 , 3 , 5 , 8 , 13 , 21 , 34 , 55 , 89 , 144 , …[3]

The Fibonacci spiral: an approximation of the golden spiral created by drawing circular arcs connecting the opposite corners of squares in the Fibonacci tiling;[4] this one uses squares of sizes 1, 1, 2, 3, 5, 8, 13, 21, and 34.

By definition, the first two numbers in the Fibonacci sequence are either 1 and 1, or 0 and 1, depending on the chosen starting point of the sequence, and each subsequent number is the sum of the previous two.

In mathematical terms, the sequence Fn of Fibonacci numbers is defined by the recurrence relation

{\displaystyle F_{n}=F_{n-1}+F_{n-2},}

with seed values[1][2]

  {\displaystyle F_{1}=1,\;F_{2}=1}


{\displaystyle F_{0}=0,\;F_{1}=1.}

The Fibonacci sequence is named after Italian mathematician Leonardo of Pisa, known as Fibonacci. His 1202 book Liber Abaci introduced the sequence to Western European mathematics,[6] although the sequence had been described earlier as Virahanka numbers in Indian mathematics.[7][8][9] The sequence described in Liber Abaci began with F1 = 1.

Fibonacci numbers are closely related to Lucas numbers  L_{n} in that they form a complementary pair of Lucas sequencesU_{n}(1,-1)=F_{n} and V_{n}(1,-1)=L_{n}. They are intimately connected with the golden ratio; for example, the closest rational approximations to the ratio are 2/1, 3/2, 5/3, 8/5, … .

Fibonacci numbers appear unexpectedly often in mathematics, so much so that there is an entire journal dedicated to their study, the Fibonacci Quarterly. Applications of Fibonacci numbers include computer algorithms such as the Fibonacci search technique and the Fibonacci heap data structure, and graphs called Fibonacci cubes used for interconnecting parallel and distributed systems. They also appear in biological settings,[10] such as branching in trees, phyllotaxis (the arrangement of leaves on a stem), the fruit sprouts of a pineapple,[11] the flowering of an artichoke, an uncurling fern and the arrangement of a pine cone‘s bracts.[12]

— Source:

Closed form

\(x_{n}=\frac{(1+5^{1/2})^{n} -(1-5^{1/2})^n}{\sqrt{5}2^n}\)

Java program and others interesting links

Sources from Bitbucket




 * Example program to find fibonacci numbers
package Fibonacci;

import static java.lang.Math.sqrt;
import java.util.Scanner;

 * @author KPreiskorn
public class Fibonacci {

   * @param args the command line arguments
  public static void main(String args[]) {

    // input to print Fibonacci series upto how many numbers
    log("Enter number n Fibonacci to print: ");
    int number = new Scanner(;

    log("\nUsing Method-1: Using Recursion. Provided Number: " + number);
    // printing Fibonacci series upto number
    for (int i = 1; i <= number; i++) {
      System.out.printf("%3d %6d\n", i, fibonacciRecusion(i));

    log("\nMethod-2: Fibonacci number at location " + number + " is ==> " + (fibonacciLoop(number) + ""));

    System.out.printf("\nMethod #3 (fibonacciClosedForm): Fibonacci number at location %d is %.0f\n\n", number, fibonacciClosedForm(number));


  // Method-1: Java program for Fibonacci number using recursion.
  public static int fibonacciRecusion(int number) {
    if (number == 1 || number == 2) {
      return 1;

    return fibonacciRecusion(number - 1) + fibonacciRecusion(number - 2); // tail recursion

  // Method-2: Java program for Fibonacci number using Loop.
  public static int fibonacciLoop(int number) {
    if (number == 1 || number == 2) {
      return 1;
    int fibo1 = 1, fibo2 = 1, fibonacci = 1;
    for (int i = 3; i <= number; i++) {
      fibonacci = fibo1 + fibo2; // Fibonacci number is sum of previous two Fibonacci number
      fibo1 = fibo2;
      fibo2 = fibonacci;

    return fibonacci; // Fibonacci number

  // metod 3: Closed-form expression
  public static double fibonacciClosedForm(int n) {
    double q = (1 + sqrt(5)) / 2;

    return Math.floor(Math.pow(q, n) / sqrt(5) + 1 / 2); // Fibonacci number

  private static void log(String number) {



Hits: 202

RegEx never endig story….

It is example of use RegEx to prepare SQL data for SELECT/UPDATE operation.

/^.*/gm and substitution: '\0',


  1. ^ asserts position at start of a line
  2. .* matches any character (except for line terminators)
  3. * Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
  4. Global pattern flags
    1. g modifier: global. All matches (don’t return after first match)
    2. m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)


This example simple replace MBS to ,'MBS'. For example when you have many selected values SQL (in one column) and need convert it to running query.



Convert it to:


Very good tools for testing: and here is this example:

other good option to test yours regex query is:


How its run?

Simple by Sublimetext, Notepad++, Visual Code –> Find/Replace command

Regular Expressions Cheat Sheet

A regular expression specifies a set of strings that matches it. This cheat sheet is based off Python 3’s Regular Expressions ( but is designed for searches within Sublime Text.

Special Characters

  • \ Escapes special characters or signals a special sequence.
  • . Matches any single character except a newline.
  • ^ Matches the start of the string.
  • $ Matches the end of the string.
  • * Greedily matches 0 or more repetitions of the preceding RE.
  • *? Matches 0 or more repetitions of the preceding RE.
  • + Greedily matches 1 or more repetitions of the preceding RE.
  • +? Matches 1 or more repetitions of the preceding RE.
  • ? Greedily matches 0 or 1 repetitions of the preceding RE.
  • ?? Matches 0 or 1 repetitions of the preceding RE.
  • A|B Matches A, if A is unmatched then matches B, where A and B are arbitrary REs.
  • {m} Matches exactly m many repetitions of the previous RE.
  • {m,n} Greedily matches from m many to n many repetitions of the previous RE.
  • {m,n}? Matches m many to n many repetitions of the previous RE.

[…] Indicates a set of characters to match.


Matches ‘a’, ‘m’, or ‘k’.


Matches ‘a’ through ‘z’.


Matches ‘a’ through ‘f’ or ‘0’ through ‘7’.


Matches ‘a’, ‘-‘, or ‘z’.


  • Matches ‘a’ or ‘-‘.
  • [-a] Matches ‘a’ or ‘-‘.
  • [(+*)] Matches ‘(‘, ‘+’, ‘*’, or ‘)’. [] matches special characters literally.
  • [\w] Matches the character class for ‘\w’. See character classes.
  • [^5] Matches anything other than ‘5’. ‘^’ forms the complementary set only as the first character in a set.
  • []()] Matches ‘]’, ‘(‘, and ‘)’. ‘]’ is taken literally only as the first character in a set.
  • [()\]] Matches ‘]’, ‘(‘, and ‘)’.

(…) Matches the RE inside the parenthesis and assigns a new group.
(?P…) The RE matched is accessible by the group indicated by name.

  • (?…) Extension notation which changes a RE’s behavior. These do not assign a new group.
  • (?aiLmsux) Sets the corresponding flag to each letter. Does not work within Sublime Text.
  • (?:…) A non-capturing version of parenthesis. The matched substring cannot be retrieved later.
  • (?P=name) Matches the substring matched by the group named name.
  • (?#…) A comment, the contents are ignored.
  • (?=…) Lookahead assertion, the preceding RE only matches if this matches.
  • (?!…) Negative lookahead assertion, the preceding RE only matches if this doesn’t match.
  • (?<=…) Positive lookbehind assertion, the following RE will only match if preceded with this fixed length RE.
  • (?<!…) Negative lookbehind assertion, the following RE will only match if not preceded with this fixed length RE.
  • (?(id)true|false) If group id exists then uses the true RE, else use the false RE.

Character classes

  • \1 Matches the contents of the group labelled by the same number. Acceptable numbers are 1-99.
  • \A Matches at the start of the current string.
  • \b Matches the empty string at the beginning or end of a word. \b matches the boundary between \w and \W.
  • \B Matches the empty string not at the beginning or end of a word.
  • \d Matches any Unicode decimal digit, including 0-9.
  • \D Matches any Unicode non-decimal digit.
  • \s Matches any Unicode whitespace character, including ‘ ‘, \t, \n, \r, \f and \v.
  • \S Matches any Unicode non-whitespace character.
  • \w Matches any Unicode word character, including a-z, A-Z, and 0-9.
  • \W Matches any Unicode non-word character.
  • \Z Matches at the end of the string.
  • \a Matches the ASCII Bell ().
  • \f Matches the ASCII Formfeed ( ).
  • \n Matches the ASCII Linefeed.
  • \r Matches the ASCII Carriage Return ().
  • \t Matches the ASCII Horizontal Tab.
  • \v Matches the ASCII Vertical Tab ( ).

Hits: 20

Tempo Planner for JIRA

Learn how to do sprint planning with Tempo Planner for JIRA. Make sure you’re fully utilizing your Tempo Planner instance.

Best way to communication in JIRA projects

Log in to HipChat with your work email address. New to HipChat? Want to create a new team? Sign up for free at

Source: HipChat

This recording covers all necessary steps to configure Tempo and JIRA to start planning. This tutorial is based on Tempo Planner Version

Hits: 18

SQL corner: 7 kind of SQL Joins. Including : INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN

Infographic of the 7 kind of SQL Joins. Including : INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN, with or without the intersect. Very useful for web developer. Source : #SQL #JOIN


Source: Pinterest

Other sources about JOIN

Hits: 110

SublimeText 3 tips and customization

I think that is one of best text editor for Linux and W$. Bellow I add some tips and usefully configuration.

Regexp conversion to Wiki links

Conversion to Wiki links add [ before and ] after text.

Find what: (http.{2,})
Relpace to: [\1]

Polish letters in Sublimetext 3

Polskie znaki diakrytyczne w Sublime Text 3 – dodanie wpisów do Key Bindings – User (na platformie Windows jest to plik Default (Windows).sublime-keymap):

{"keys": ["control+alt+a"], "command": "insert", "args": {"characters": "ą"}},
{"keys": ["control+alt+c"], "command": "insert", "args": {"characters": "ć"}},
{"keys": ["control+alt+e"], "command": "insert", "args": {"characters": "ę"}},
{"keys": ["control+alt+l"], "command": "insert", "args": {"characters": "ł"}},
{"keys": ["control+alt+n"], "command": "insert", "args": {"characters": "ń"}},
{"keys": ["control+alt+o"], "command": "insert", "args": {"characters": "ó"}},
{"keys": ["control+alt+s"], "command": "insert", "args": {"characters": "ś"}},
{"keys": ["control+alt+x"], "command": "insert", "args": {"characters": "ź"}},
{"keys": ["control+alt+z"], "command": "insert", "args": {"characters": "ż"}},
{"keys": ["shift+control+alt+a"], "command": "insert", "args": {"characters": "Ą"}},
{"keys": ["shift+control+alt+c"], "command": "insert", "args": {"characters": "Ć"}},
{"keys": ["shift+control+alt+e"], "command": "insert", "args": {"characters": "Ę"}},
{"keys": ["shift+control+alt+l"], "command": "insert", "args": {"characters": "Ł"}},
{"keys": ["shift+control+alt+n"], "command": "insert", "args": {"characters": "Ń"}},
{"keys": ["shift+control+alt+o"], "command": "insert", "args": {"characters": "Ó"}},
{"keys": ["shift+control+alt+s"], "command": "insert", "args": {"characters": "Ś"}},
{"keys": ["shift+control+alt+x"], "command": "insert", "args": {"characters": "Ź"}},
{"keys": ["shift+control+alt+z"], "command": "insert", "args": {"characters": "Ż"}}

Adding comma to each line using sublime text

To add comma to any line

  1. Select the lines you want to modify
  2. CTRL + SHIFT + L
  4. COMMA

Using ctrl + shift + L is how you can modify all selected lines. Very handy 🙂 Make batch edits with Multiple Selections.

Column Selection can be used to select a rectangular area of a file. Column selection doesn’t operate via a separate mode, instead it makes use of multiple selections.

You can use additive selections to select multiple blocks of text, or subtractive selections to remove a block.

‘Find What’: $ // matching all ends of your lines
‘Replace With’: , // replaces all line ends with a coma

Sublimetext array

Solve this problem

Source: Best of Sublime Text 3: Features, Plugins, and Settings | Scotch

Emmet is usefull

Emmet is an absolute time saver. You can build HTML on the fly easily and quickly.

To Use: ctrl + alt + enter and start typing your Emmet styled HTML

  • ctrl + d: Select the current word and the next same word
  • ctrl + click: Every place you click will create a cursor to edit
  • ctrl + shift + f AND alt + enter: Find a word in your files and then select them all
Emmet in sublimetext

Check out our Emmet Interactive Guide to learn more and try out Emmet for yourself.


A really great way to easily create doc blocks for many languages including JavaScript, PHP, and CoffeeScript. Just type in /** above your function and press tab. Watch the magic as DocBlockr takes the function name and variables and creates your doc block.



This plugin provides bracket highlighting for all sorts of brackets.


Sublime Text 3 is an amazing piece of software. To start, it is a clean, functional, and fast code editor. Not only does it have incredible built in features (multi-edit and vim mode), but it has support for plugins, snippets, and many other things.

Source: Best of Sublime Text 3: Features, Plugins, and Settings | Scotch

Reference links

Hits: 72

Proudly powered by WordPress | Theme: Baskerville 2 by Anders Noren.

Up ↑