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Ruby on Rails Callback, what is difference between :before_save and :before_create?
Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create ?
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HTML 5 Favicon - Support?
...s Phone Users for your website one must use the following code:
Here are detailed instructions from Microsoft but here is a synopsis:
Step 1
Create a square image for your website, to support hi-res screens create it at 768x768 pixels in size.
Step 2
Add a hidden overlay of this image. Here is...
What makes JNI calls slow?
...ters for each JNI call and the code is not optimized.
There are many more details outlined in this paper
If you are interested in benchmarking JNI vs native code this project has code for running benchmarks.
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How to embed an autoplaying YouTube video in an iframe?
...may have parameters like color, controls and each separated by & sign. detail description can be seen here developers.google.com/youtube/player_parameters#Parameters
– Waheed ur Rehman
Jun 19 '16 at 0:12
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How does bash tab completion work?
...ry quite much, see the section Command line editing of the Bash manual for details.)
Bash itself has the built-in complete to define a completion mechanism for individual commands. If for the current command nothing is defined, it used completion by file name (using opendir/readdir, as Ignacio said)...
How can I style an Android Switch?
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Very detailed thanks, the 9-patch slider images that let part of the thumb move out of the track was especially helpful as i couldn't work out how they were doing that. (the default slider has the pointy edge bits move past the en...
How to get memory available or used in C#
...es of physical memory mapped to the process context.
If you want a lot of details there is System.Diagnostics.PerformanceCounter, but it will be a bit more effort to setup.
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When should one use RxJava Observable and when simple Callback on Android?
...t you have an Instagram-clone, and you want to retrieve 2 JSONs:
1. getUserDetails()
2. getUserPhotos()
You want to load these two JSONs in parallel, and when both are loaded, the page should be displayed.
The callback variant will become a bit more difficult: you have to create 2 callbacks, store ...
Configuring IntelliJ IDEA for unit testing with JUnit
..." answer please scroll down. This is quick and short answer, below is more detailed answer.
– Igor Konoplyanko
Jan 29 '16 at 13:53
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Friend declaration in C++ - difference between public and private
... for documentation purposes, would you consider a friend an implementation detail or part of the interface?
– TemplateRex
Aug 24 '14 at 18:38
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