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UIViewController viewDidLoad vs. viewWillAppear: What is the proper division of labor?
...on the type of tasks that should be assigned to viewDidLoad vs. viewWillAppear : in a UIViewController subclass.
4 An...
What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
...e page's data with a single query and are well suited for content oriented applications (which is why big sites like Facebook or Amazon like them).
Other kinds of NoSQL databases include column-oriented stores, graph databases and even object databases. But this goes beyond the question.
See also
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What is the X-REQUEST-ID http header?
...servers down the line, e.g. web server generates the id and forwards it to application server.
– isapir
Feb 5 '15 at 19:57
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AngularJS ng-click stopPropagation
...wise calling $event.stopPropagation() was redirecting me to the root of my app when clicking the button.
– Desty
Oct 21 '15 at 16:13
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Detecting that the browser has no mouse and is touch-only
I'm developing a webapp (not a website with pages of interesting text) with a very different interface for touch (your finger hides the screen when you click) and mouse (relies heavily on hover preview).
How can I detect that my user has no mouse to present him the right interface? I plan to leave a...
In WPF, what are the differences between the x:Name and Name attributes?
...tyAttribute on the class that designates one of the classes properties as mapping to the x:Name attribute of XAML.
The reason this was done was to allow for frameworks that already have a concept of "Name" at runtime, such as WPF. In WPF, for example, FrameworkElement introduces a Name property.
I...
What's the difference between dependencies, devDependencies and peerDependencies in npm package.json
...endency2/
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+- dependency3 v1.0/
This happens even though you never mention dependency3 in your package.json file.
I think this is an instance of the Inversion of Control design pattern.
A prototypical example of peer dependencies is Grunt, the host, and its plu...
What does “zend_mm_heap corrupted” mean
All of the sudden I've been having problems with my application that I've never had before. I decided to check the Apache's error log, and I found an error message saying "zend_mm_heap corrupted". What does this mean.
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When to use dynamic vs. static libraries
....lib , .a ) libraries. What is the difference between them and when is it appropriate to use which?
18 Answers
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A migration to add unique constraint to a combination of columns
What I need is a migration to apply unique constraint to a combination of columns. i.e. for a people table, a combination of first_name , last_Name and Dob should be unique.
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