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Java synchronized static methods: lock on object or class
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Please answer Elaborate so that everyone can understand.
– Madhu
Sep 2 '09 at 4:49
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Save PL/pgSQL output from PostgreSQL to a CSV file
...ing easy to re-use or automate, you can use Postgresql's built in COPY command. e.g.
Copy (Select * From foo) To '/tmp/test.csv' With CSV DELIMITER ',' HEADER;
This approach runs entirely on the remote server - it can't write to your local PC. It also needs to be run as a Postgres "superuser" (no...
How to echo shell commands as they are executed
In a shell script, how do I echo all shell commands called and expand any variable names?
13 Answers
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Catching java.lang.OutOfMemoryError?
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I agree and disagree with most the responses here.
There are a number of scenarios where you may wish to catch an OutOfMemoryError and in my experience (on Windows and Solaris JVMs), only very infrequently is OutOfMemoryError the de...
How to benchmark efficiency of PHP script
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If you actually want to benchmark real world code, use tools like Xdebug and XHProf.
Xdebug is great for when you're working in dev/staging, and XHProf is a great tool for production and it's safe to run it there (as long as you read the instructions). The results of any one single page load aren...
Match whitespace but not newlines
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Perl versions 5.10 and later support subsidiary vertical and horizontal character classes, \v and \h, as well as the generic whitespace character class \s
The cleanest solution is to use the horizontal whitespace character class \h. This will ...
Regular expression to match a line that doesn't contain a word
I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v ). However, is it possible to match lines that do not contain a specific word, e.g. hede , using a regular expression?
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How to find third or nth maximum salary from salary table?
...FKYS_INS_ID from cmn_pat_x_insurance ins where ins.FKYS_PAT_ID='1253_717' and ins.FKYS_INS_TYPE in(1) and ins.BOL_TYPE in(1,3) and ins.salary in (min(ins.salary))
– saidesh kilaru
Dec 11 '13 at 5:32
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How to set the font style to bold, italic and underlined in an Android TextView?
I want to make a TextView 's content bold, italic and underlined. I tried the following code and it works, but doesn't underline.
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What is “Orthogonality”?
...em would be a radio, where changing the station does not change the volume and vice-versa.
A non-orthogonal system would be like a helicopter where changing the speed can change the direction.
In programming languages this means that when you execute an instruction, nothing but that instruction ...