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Run a callback only if an attribute has changed in Rails
I have the following association in my app:
3 Answers
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CharSequence VS String in Java?
...ting its instances for equality with those of the other. It is therefore inappropriate to use arbitrary CharSequence instances as elements in a set or as keys in a map.
– Trevor Robinson
Feb 10 '12 at 23:39
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How to handle button clicks using the XML onClick within Fragments
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I'm running into the same issue, and even though I appreciate your response, this is not clean code from a software engineering point of view. This code results in the activity being tightly coupled with the fragment. You should be able to re-use the same fragment in multiple...
When to throw an exception?
I have exceptions created for every condition that my application does not expect. UserNameNotValidException , PasswordNotCorrectException etc.
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C# How can I check if a URL exists/is valid?
...arallel.Foreach loop if you hadn't tried that yet. It made my url testing app MUCH faster.
– Jack Fairfield
Apr 28 '17 at 21:59
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What's the correct way to communicate between controllers in AngularJS?
...gistered
Since there is no scope above $rootScope, there is no bubbling happening. It is totally safe to use $rootScope.$emit()/ $rootScope.$on() as an EventBus.
However, there is one gotcha when using it from within Controllers. If you directly bind to $rootScope.$on() from within a controller, ...
Simplest SOAP example
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I am developing cross-platform app in nativescript for android/ios. I want to use SOAP web services. Please guide me for the same. I used above code for SOAP request & i want SOAP response format, how to handle response. Please review my question - sta...
When to use NSInteger vs. int
...ould I be using NSInteger vs. int when developing for iOS? I see in the Apple sample code they use NSInteger (or NSUInteger ) when passing a value as an argument to a function or returning a value from a function.
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How to resume Fragment from BackStack if exists
...removed and A is resumed. and pressing again back button should
exit the app. But it is showing a blank window and need another press
to close it.
This is because the FragmentTransaction is being added to the back stack to ensure that we can pop the fragments on top later. A quick fix for this...
Finding JavaScript memory leaks with Chrome
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I appreciate your effort. Indeed, the three snapshot technique is regularly mentioned in tutorials. Unfortunately, the details are often left out. For instance, I appreciate the introduction of the $0 function in the console, t...