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I am learning backbone.js, in it's tutorial, it has the following code
var object = {}; _.extend(object, Backbone.Events); ... I don't understand the "_" in the code, what does it means? and what is this "extend"? does it has the same meaning as jQuery.extend ?
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—used interjectionally to express resolution or resignation especially at the beginning of a difficult or unpleasant undertaking. — neither here nor there. : having no interest or relevance : of no consequence. comfort is neither here nor there to a real sailor.
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From Backbone's own homepage :
Backbone's only hard dependency is Underscore.js.
_ is the object created by Underscore.js, in the same way as $ is the jQuery object
http://documentcloud.github.com/underscore/#extend as for what _.extend does.
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It copies all the Backbone.Events properties over to the object. Extend is a method from the underscore library: http://documentcloud.github.com/underscore/#extend
I'd say it's the same as the jQuery method.
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