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How to generate all permutations of a list?
...re using an older Python (<2.6) for some reason or are just curious to know how it works, here's one nice approach, taken from http://code.activestate.com/recipes/252178/:
def all_perms(elements):
if len(elements) <=1:
yield elements
else:
for perm in all_perms(elemen...
Remove duplicates from a List in C#
...k to front, to avoid having to resort list after each removal
This example now uses C# Value Tuples to do the swapping, substitute with appropriate code if you can't use that
The end-result is no longer sorted
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.gitignore all the .DS_Store files in every folder and subfolder
...gnore file somewhere, e.g.
echo .DS_Store >> ~/.gitignore_global
Now tell git to use it for all repositories:
git config --global core.excludesfile ~/.gitignore_global
This page helped me answer your question.
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MySQL: #126 - Incorrect key file for table
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First of all, you should know that keys and indices are synonyms in MySQL. If you look at the documentation about the CREATE TABLE Syntax, you can read:
KEY is normally a synonym for INDEX. The key attribute PRIMARY KEY can also be specified as ju...
How can I see incoming commits in git? [duplicate]
...hand for showing the commits between "the common ancestor of wherever I am now and origin" through "origin".
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HTML: Include, or exclude, optional closing tags?
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i see it now. <LI> is like a bullet. Nobody would want to have to wrap an entire bulleted point in <LI>...</LI>. So in that way the LI matches what people would naturally write during markup. Sames goes for a paragr...
UICollectionView reloadData not functioning properly in iOS 7
...lost two days on it because I could not understand what was happening, and now that I applied your solution and that it works, I still do not understand why it is now working. That's so frustrating ! Anyway, thanks for the help :D !!
– CyberDandy
Dec 29 '14 at ...
How can I debug a .BAT script?
...uld like to see what is the order in which they are called, so that I may know where exactly I have to go about and add my modifications.
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How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this:
11 Answers
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How can I validate a string to only allow alphanumeric characters in it?
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I detest regular expressions. I know that I will never remember the syntax. Even if I study it, there will come a time soon when it's all forgotten again.
– Sentinel
Jan 14 '15 at 17:26
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