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How long is the SHA256 hash?
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If you think you might want to block a user in the future, then I suggest using varchar(65) for a leading !... just saying.
– Manatax
Mar 9 '14 at 21:42
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Rotating a two-dimensional array in Python
...tual list. So:
rotated = list(reversed(list(zip(*original))))
We can simplify that a bit by using the "Martian smiley" slice rather than reversed()... then we don't need the outer list():
rotated = list(zip(*original))[::-1]
Of course, you could also simply rotate the list clockwise three times. :...
NSLog/printf specifier for NSInteger?
... 32-bit platforms, and 64 bits on 64-bit platforms. Is there a NSLog specifier that always matches the size of NSInteger ?
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List Git aliases
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This answer builds upon the answer by johnny. It applies if you're not using git-alias from git-extras.
On Linux, run once:
git config --global alias.alias "! git config --get-regexp ^alias\. | sed -e s/^alias\.// -e s/\ /\ =\ /"
This will create a permanent git alias named ali...
error: command 'gcc' failed with exit status 1 while installing eventlet
...dev
For eventlet you might also need the libevent libraries installed so if you get an error talking about that you can install libevent with:
sudo apt-get install libevent-dev
share
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improve t...
Delete files older than 10 days using shell script in Unix [duplicate]
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It depends of the date of the modification, like what ls -l displays. Are the date the same as ls -l ? But a simple test will tell you =)
– Gilles Quenot
Nov 21 '12 at 9:06
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Get index of selected option with jQuery
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I have a slightly different solution based on the answer by user167517. In my function I'm using a variable for the id of the select box I'm targeting.
var vOptionSelect = "#productcodeSelect1";
The index is returned with:
$(vOptionSelect)....
Block Comments in Clojure
... is also the comment macro which has a similar effect, but is implemented differently.
Both the above require that the thing that you're commenting out is otherwise a syntactically correct S-expression.
Some Lisp dialects have a multi-line comment that can contain arbitrary text, but I don't see o...
CocoaPods - use specific pod version
.... Of course, this needs to be done from your project's top level folder. If the update does not occur, edit your Podfile.lock file and change the AFNetworking version # to something less than what it is and issue a pod update in the terminal again. This tells CocoaPods that you have a different v...
C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
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};
int main(int argc, char** argv) {
struct foo f={0};
if (f.a->s) {
printf( f.a->s);
}
return 0;
}
你编译一下上面的代码，在VC++和GCC下都会在14行的printf处crash掉你的程序。@Laruence 说这个是个经典的坑，...