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Disable migrations when running unit tests in Django 1.7

... syncdb did in 1.6. I defined a new settings module just for unit tests called "settings_test.py", which imports * from the main settings module and adds this line: MIGRATION_MODULES = {"myapp": "myapp.migrations_not_used_in_tests"} Then I run tests like this: DJANGO_SETTINGS_MODU...
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get just the integer from wc in bash

... that if you're going to answer a (1.5 yr-old) question) might as well put all the info into the answer, that's all :) – Dave Newton Jan 30 '12 at 23:47 ...
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Convert Python dictionary to JSON array

... If you are fine with non-printable symbols in your json, then add ensure_ascii=False to dumps call. >>> json.dumps(your_data, ensure_ascii=False) If ensure_ascii is false, then the return value will be a unico...
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Consequences of using graft in Mercurial

...state F with the normal delta +f. There's nothing strange here — we have all the states (D, E, and F) in the repository already. So seen like this, it's clear that we can merge D and F. Merging is a matter of "completing the diamond". So we find a new state M that is a mix of D and F and where th...
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Nested defaultdict of defaultdict

Is there a way to make a defaultdict also be the default for the defaultdict? (i.e. infinite-level recursive defaultdict?) ...
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Convert number to month name in PHP

... The recommended way to do this: Nowadays, you should really be using DateTime objects for any date/time math. This requires you to have a PHP version >= 5.2. As shown in Glavić's answer, you can use the following: $monthNum = 3; $dateObj = DateTime::createFromFormat('!m',...
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C++ static virtual members?

... No, there's no way to do it, since what would happen when you called Object::GetTypeInformation()? It can't know which derived class version to call since there's no object associated with it. You'll have to make it a non-static virtual function to work properly; if you also want to be...
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Python argparse mutual exclusive group

... add_mutually_exclusive_group doesn't make an entire group mutually exclusive. It makes options within the group mutually exclusive. What you're looking for is subcommands. Instead of prog [ -a xxxx | [-b yyy -c zzz]], you'd have: p...
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What is the difference between Ruby 1.8 and Ruby 1.9

... Sam's slides. The slideshow is less overwhelming to review, but having it all laid out in a list like this is also helpful. Ruby 1.9 - Major Features Performance Threads/Fibers Encoding/Unicode gems is (mostly) built-in now if statements do not introduce scope in Ruby. What's changed? Single ...
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Can I replace groups in Java regex?

I have this code, and I want to know, if I can replace only groups (not all pattern) in Java regex. Code: 7 Answers ...