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Drop rows with all zeros in pandas data frame
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12 Answers
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Why are Perl 5's function prototypes bad?
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121
Prototypes aren't bad if used correctly. The difficulty is that Perl's prototypes don't work th...
How do I set the value property in AngularJS' ng-options?
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27 Answers
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Truncate Two decimal places without rounding
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21 Answers
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How do you print in Sublime Text 2
Sublime Text 2 seems like a great editor. I just started using it a week ago in eval mode and it doesn't seem to have any printing functionality. This seems preposterous to me, but I can't find it anywhere.
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How to get the root dir of the Symfony2 application?
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UPDATE 2018-10-21:
As of this week, getRootDir() was deprecated. Please use getProjectDir() i...
How to check if a python module exists without importing it
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Python2
To check if import can find something in python2, using imp
import imp
try:
imp.fi...
How to chain scope queries with OR instead of AND?
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maerics
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answered Sep 10 '10 at 12:38
PetrosPetros...
Determine what attributes were changed in Rails after_save callback?
... through Rails 5.1 (but is deprecated in 5.1 and has breaking changes in 5.2). You can read about the change in this pull request.
In your after_update filter on the model you can use _changed? accessor. So for example:
class SomeModel < ActiveRecord::Base
after_update :send_notification_aft...
How to write LaTeX in IPython Notebook?
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edited Jun 18 '14 at 12:36
katahdin
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answered May 21 '13 at 1:1...