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MySQL: Set user variable from result of query
...rator. However inside other statements, the assignment operator must be := and not = because = is treated as a comparison operator in non-SET statements.
UPDATE:
Further to comments below, you may also do the following:
SET @user := 123456;
SELECT `group` FROM user LIMIT 1 INTO @group;
SELECT ...
while (1) Vs. for (;;) Is there a speed difference?
...ase, but chances are the code inside of the loop is going to be a few thousand times more expensive than the loop itself anyway, so who cares?
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What is the “volatile” keyword used for?
... correct usage. Could you please tell me what it should be used for in C# and in Java?
8 Answers
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How to split a file into equal parts, without breaking individual lines? [duplicate]
...equal except for the last), without breaking the line? Using the split command in Unix, lines may be broken in half. Is there a way to, say, split up a file in 5 equal parts, but have it still only consist of whole lines (it's no problem if one of the files is a little larger or smaller)? I know I c...
What is the purpose of “!” and “?” at the end of method names?
Sometimes I see methods in Ruby that have "?" and "!" at the end of them, e.g:
5 Answers
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Return a value from AsyncTask in Android [duplicate]
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Why not call a method that handles the value?
public class MyClass extends Activity {
private class myTask extends AsyncTask<Void, Void, Void> {
//initiate vars
public myTask() {
super();
//my params ...
How to set target hosts in Fabric file
I want to use Fabric to deploy my web app code to development, staging and production servers. My fabfile:
15 Answers
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Automatically remove Subversion unversioned files
...The other solution from bellow svn cleanup --remove-unversioned is better. And it is for Subversion 1.9.0 (this version is from 2015). It is stable and standar.
– tres.14159
Nov 21 '18 at 8:19
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How do I replace multiple spaces with a single space in C#?
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I have copy and paste that and it works. I really do not like REgex but this time it saves my life.
– Pokus
Oct 15 '08 at 22:22
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Converting string to numeric [duplicate]
I've imported a test file and tried to make a histogram
2 Answers
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