javascript - What is the underscore function for? -

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i've been using underscore collection of statics.

what underscore function for:

var _ = function(obj) {     if (obj instanceof _) return obj;     if (!(this instanceof _)) return new _(obj);     this._wrapped = obj;   };

what example of how use this?

you can use underscore wrapper function, more oop-like style:

_(val).method(…); // instead of equal _.method(val, …);

these wrapper objects allow chaining:

_.chain(val).method1(…).method2(…); // or _(val).chain().method1(…).method2(…);

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