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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 ...
What is the copy-and-swap idiom?
...hat this is non-throwing, because of the data
// types being used; more attention to detail with regards
// to exceptions must be given in a more general case, however
std::copy(other.mArray, other.mArray + mSize, mArray);
}
// destructor
~dumb_array()
{
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Remove substring from the string
...ice! "foo"
=> "foo"
a
=> "bar"
there is a non '!' version as well. More info can be seen in the documentation about other versions as well:
http://www.ruby-doc.org/core/classes/String.html#method-i-slice-21
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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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