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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...
Rails create or update magic?
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Oh... I see what you meant now - that both forms, find_or_initialize_by and find_or_create_by accept a block. I thought you meant that whether the record exists or not, a block will be passed down with the record object as an argument, in order to do t...
C# XML Documentation Website Link
... works in VS 16.4.2. Not sure what version it was added, only that you can now click links in the method info window.
– JB06
Jan 9 at 17:35
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What optimizations can GHC be expected to perform reliably?
GHC has a lot of optimizations that it can perform, but I don't know what they all are, nor how likely they are to be performed and under what circumstances.
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How do I link to part of a page? (hash?)
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Note this is now obsolete in HTML5.
– Tim
Jun 12 '16 at 11:53
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Should I use SVN or Git? [closed]
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Moving on 2 years we now have some good windows tools. Currently I'm using netbeans with MSysGit. I've also had good luck with TortoiseGit. I think it's good enough to be used in production. Considering how hard it is to manage simple conflicts i...
Indenting code in Sublime text 2?
...s-User contains exactly those lines and save that file. Also make sure ST knows which kind of filetype/syntax it should use (is your syntax highlighting correct?). If it still does not work try a different key (e.g. "f8" seems unused) then if that does not work either check whether user defined keyb...
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...
Django: “projects” vs “apps”
.... Simple as that. All this "project"/"app" stuff is just python packages.
Now, how are you supposed to do it? Or rather, how might I do it? Well, if you create a significant piece of reusable functionality, like say a markup editor, that's when you create a "top level app" which might contain widge...
Check if a temporary table exists and delete if it exists before creating a temporary table
...olumn later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
15 Answers
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