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What's the difference between backtracking and depth first search?
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Backtracking is a more general purpose algorithm.
Depth-First search is a specific form of backtracking related to searching tree structures. From Wikipedia:
One starts at the root (selecting some node as the root in the graph case) and ...
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
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rails 3 validation on uniqueness on multiple attributes
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I would say that logically it makes more sense to say that you require recorded_at to be unique within the scope of a zipcode. validate :recorded_at, : uniqueness => { :scope => :zipcode }
– Ariejan
Jul 29 '10 at ...
Asynctask vs Thread in android
... do not require downloading a lot of data
Disk-bound tasks that might take more than a few milliseconds
Use Java threads for:
Network operations which involve moderate to large amounts of data (either uploading or downloading)
High-CPU tasks which need to be run in the background
Any task where ...
How do I pass an object from one activity to another on Android? [duplicate]
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What does the exclamation mark do before the function?
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So what the author is doing is saving a byte per function expression; a more readable way of writing it would be this:
(function(){})();
Lastly, ! makes the expression return true. This is because by default all IIFE return undefined, which leaves us with !undefined which is true. Not particul...
entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
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How do I declare a namespace in JavaScript?
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Why use sprintf function in PHP?
I am trying to learn more about the PHP function sprintf() but php.net did not help me much as I am still confused, why would you want to use it?
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