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what exactly is device pixel ratio?

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Ruby on Rails: How do I add placeholder text to a f.text_field?

... answered Jun 29 '11 at 18:04 nslocumnslocum 4,84711 gold badge2424 silver badges2727 bronze badges ...
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Python unittests in Jenkins?

... 174 sample tests: tests.py: # tests.py import random try: import unittest2 as unittest except...
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How is Math.Pow() implemented in .NET Framework?

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How to go to an error using only the keyboard in Eclipse?

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Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?

...atetimes too (if you use pd.NaT you won't need to specify the dtype) In [24]: s = Series([Timestamp('20130101'),np.nan,Timestamp('20130102 9:30')],dtype='M8[ns]') In [25]: s Out[25]: 0 2013-01-01 00:00:00 1 NaT 2 2013-01-02 09:30:00 dtype: datetime64[ns]`` In [26]: pd.isnul...
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Argparse optional positional arguments?

... techtonik 16.3k88 gold badges102102 silver badges124124 bronze badges answered Dec 18 '10 at 21:15 Vinay SajipVinay Sajip 80.8k11...
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How do I write a “tab” in Python?

... | edited Jul 8 '19 at 22:49 Drew Dormann 47.5k1111 gold badges101101 silver badges153153 bronze badges ...
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How do I run a single test with Nose in Pylons

... 234 nosetests appname.tests.functional.test_controller should work, where the file is named test_con...
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Mongo: find items that don't have a certain field

... Somnath Muluk 43.6k2828 gold badges198198 silver badges212212 bronze badges answered Apr 19 '11 at 16:19 Andrew Ors...