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How to assign a heredoc value to a variable in Bash?
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What is the difference between id and class in CSS, and when should I use them? [duplicate]
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For more info on this click here.
Example
<div id="header_id" class="header_class">Text</div>
#header_id {font-color:#fff}
.header_class {font-color:#000}
(Note that CSS uses the prefix # for IDs and . for Clas...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
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@JulioGuerra Much like having a /usr/lib/sendmail (or, more recently, /usr/sbin/sendmail) binary available to process mail, it's in a Unix-like system's best interest to have /usr/bin/env because the env shebang is such common practice. It is a de facto standard interface.
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Getting the last element of a list
...some_list[-1] is the shortest and most Pythonic.
In fact, you can do much more with this syntax. The some_list[-n] syntax gets the nth-to-last element. So some_list[-1] gets the last element, some_list[-2] gets the second to last, etc, all the way down to some_list[-len(some_list)], which gives you...
MySQL Error 1093 - Can't specify target table for update in FROM clause
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Update: This answer covers the general error classification. For a more specific answer about how to best handle the OP's exact query, please see other answers to this question
In MySQL, you can't modify the same table which you use in the SELECT part.
This behaviour is documented at:
http:...
How to count the frequency of the elements in an unordered list?
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How to get the difference between two arrays in JavaScript?
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Why malloc+memset is slower than calloc?
...) will first try to get 16 bytes out of one of its pools, and then ask for more memory from the kernel when the pool runs dry. However, since the program you're asking about is allocating for a large amount of memory at once, malloc() and calloc() will just ask for that memory directly from the ker...
SQL Server - transactions roll back on error?
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Function in JavaScript that can be called only once
...atic variables that can do the work but I would like to know if there is a more elegant way to do this?
24 Answers
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