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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...
Two way sync with rsync
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RazerM
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answered May 29 '10 at 21:50
alexalex
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Passing arrays as parameters in bash
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223
You can pass multiple arrays as arguments using something like this:
takes_ary_as_arg()
{
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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 do I get the YouTube video ID from a URL?
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What is the { get; set; } syntax in C#?
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answered Feb 23 '11 at 20:53
Klaus Byskov PedersenKlaus Byskov Pedersen
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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...