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How to check if a python module exists without importing it
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208
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
126k3434 gold badges234234 silver badges268268 bronze badges
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
34955 silver badges1616 bronze badges
answered May 21 '13 at 1:1...
AngularJS - Create a directive that uses ng-model
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210
EDIT: This answer is old and likely out of date. Just a heads up so it doesn't lead folks ast...
disable textbox using jquery?
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210
HTML
<span id="radiobutt">
<input type="radio" name="rad1" value="1" />
<i...
Python dictionary: are keys() and values() always the same order?
...1-to-1 mapping (assuming the dictionary is not altered between calling the 2 methods).
8 Answers
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Check whether or not the current thread is the main thread
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edited Aug 2 '19 at 23:29
Louis CAD
8,17522 gold badges2929 silver badges4545 bronze badges
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Filter Java Stream to 1 and only 1 element
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20 Answers
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