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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...
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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Passing arrays as parameters in bash
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You can pass multiple arrays as arguments using something like this:
takes_ary_as_arg()
{
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How can I time a code segment for testing performance with Pythons timeit?
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You can use time.time() or time.clock() before and after the block you want to time.
import t...
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...
Filter Java Stream to 1 and only 1 element
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