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Change old commit message on Git
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130
It says:
When you save and exit the editor, it will rewind you back to that last commit in tha...
Swapping column values in MySQL
...t. This method doesn't swap the values if one of them is NULL. Use method #3 that doesn't have this limitation.
UPDATE swap_test SET x=y, y=@temp WHERE (@temp:=x) IS NOT NULL;
This method was offered by Dipin in, yet again, the comments of http://beerpla.net/2009/02/17/swapping-column-values-in-mys...
Group by & count function in sqlalchemy
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3 Answers
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Reload django object from database
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Tim FletcherTim Fletcher
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Will using goto leak variables?
...();
lol:
return 0;
}
// error: label 'lol' used but not defined
[n3290: 6.1/1]: [..] The scope of a label is the function in which
it appears. [..]
2. Object initialisation
You can't jump across object initialisation:
int main() {
goto lol;
int x = 0;
lol:
return 0;
}
// e...
Rails migrations: self.up and self.down versus change
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3 Answers
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Set “this” variable easily?
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223
There are two methods defined for all functions in JavaScript, call(), and apply(). The function...
How do I print the elements of a C++ vector in GDB?
...ctor
This will produce an output similar to:
$1 = std::vector of length 3, capacity 4 = {10, 20, 30}
To achieve above, you need to have gdb 7 (I tested it on gdb 7.01) and some python pretty-printer. Installation process of these is described on gdb wiki.
What is more, after installing above, ...
How can I show the name of branches in `git log`?
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