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Determine what attributes were changed in Rails after_save callback?
...ved_change_to_attribute?(:published).
Rails 3–5.1
Warning
This approach works 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 fo...
What is the best way to uninstall gems from a rails3 project?
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Bundler is launched from your app's root directory so it makes sure all needed gems are present to get your app working.If for some reason you no longer need a gem you'll have to run the
gem uninstall gem_name
as you stated above.So every time yo...
How to fix getImageData() error The canvas has been tainted by cross-origin data?
...onymous";
This only works if the remote server sets the following header appropriately:
Access-Control-Allow-Origin "*"
The Dropbox file chooser when using the "direct link" option is a great example of this. I use it on oddprints.com to hoover up images from the remote dropbox image url, into ...
Difference between objectForKey and valueForKey?
...orKey can be intensely slow - it's currently a major bottleneck in my iPad app, so slow that replacing it with a "standard" dictionary made the app noticeably faster. Something very wrong with KVC on iOS, and I'll never use it again - not worth the drop in performance, and having to re-write it the ...
Injecting $scope into an angular service function()
...cope is to "glue together" the presentation and the business logic of your app. It does not make much sense to pass a $scope into a service.
Services are singleton objects used (among other things) to share data (e.g. among several controllers) and generally encapsulate reusable pieces of code (sin...
spring boot default H2 jdbc connection (and H2 console)
... H2 database which spring-boot creates when I don't specify anything in my application.properties and start with mvn spring:run. I can see hibernate JPA creating the tables but if I try to access the h2 console at the URL below the database has no tables.
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What's the fastest way to loop through an array in JavaScript?
...our code
i++
}
I would say, this is definitely a case where I applaud JavaScript engine developers. A runtime should be optimized for clarity, not cleverness.
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When is layoutSubviews called?
... Oct 21 '13 at 7:09
Patrick PijnappelPatrick Pijnappel
6,0173535 silver badges3939 bronze badges
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Actionbar notification count icon (badge) like Google has
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It's great ! But if you use AppCompat, you should set the ActionLayout in code : MenuItem item = menu.findItem(R.id.badge); MenuItemCompat.setActionView(item, R.layout.feed_update_count); notifCount = (Button) MenuItemCompat.getActionView(item);
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AngularJs event to call after content is loaded
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The problem with this approach is that controllers have not fully initialized at this point.
– Ash Blue
Jun 17 '14 at 8:59
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