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Determine what attributes were changed in Rails after_save callback?
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186
Rails 5.1+
Use saved_change_to_published?:
class SomeModel < ActiveRecord::Base
after_u...
Why does Git treat this text file as a binary file?
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14 Answers
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Example for boost shared_mutex (multiple reads/one write)?
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103
It looks like you would do something like this:
boost::shared_mutex _access;
void reader()
{
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NoSQL - MongoDB vs CouchDB [closed]
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149
See following links
CouchDB Vs MongoDB
MongoDB or CouchDB - fit for production?
DB-Engines -...
Is it possible to await an event instead of another async method?
...im Class as a signal:
private SemaphoreSlim signal = new SemaphoreSlim(0, 1);
// set signal in event
signal.Release();
// wait for signal somewhere else
await signal.WaitAsync();
Alternatively, you can use an instance of the TaskCompletionSource<T> Class to create a Task<T> that r...
Simple way to find if two different lists contain exactly the same elements?
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16 Answers
16
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Why does python use 'else' after for and while loops?
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21 Answers
21
Active
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iPhone app signing: A valid signing identity matching this profile could not be found in your keycha
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Map enum in JPA with fixed values?
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169
For versions earlier than JPA 2.1, JPA provides only two ways to deal with enums, by their na...
How to select date from datetime column?
I have a column of type "datetime" with values like 2009-10-20 10:00:00
8 Answers
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