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PO
primarykey
Id
18241437
data
AcceptedAnswerId
0
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0
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0
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CreationDate
2013-08-14T20:16:13.910
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LastActivityDate
2013-08-14T20:35:35.547
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2013-08-14T20:35:35.547
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1066922
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1066922
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18240994
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2
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0
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text
Body
This is perfectly valid Javascript. Any javascript function (say <code>Func</code>)can be used as a constructor and the constructor invocation also requires a <code>prototype</code> property (i.e. <code>F.prototype</code> or the prototype associated with the function) . Thus (almost) every function has a prototype property. The value of this property (i.e. <code>Func.prototype</code>). Now the value of this prototype associated with the function is an object itself that has a single non enumerable property called constructor. And the value of this constructor property is the function object (i.e. <code>F</code> itself). Lets take an example. Say I construct a function <code>Func</code> <pre> var Func = function() { //your definition }; </pre> Now since this can be invoked as a constructor it has to have a <code>prototype</code> property <code>Func.prototype</code> lets call this <code>proto</code>. <pre> proto = Func.prototype; </pre> Now the prototype has a single property (that is non enumerable) called constructor. This constructor has a value that is equal to the function object itself. Dont believe me check it like this <pre> Func.prototype.constructor === Func // =>true </pre> Will always return true for any function. Now from the code you explained : So basically these two lines <pre> MyObject.prototype = Object.create(MyObject.prototype); MyObject.prototype.constructor = MyObject; </pre> are modifying the value of the prototye to have a constructor property with the value of <code>MyObject</code> that is defined. But that would have happened anyways in the normal course of things. But the reason could be that maybe the <code>prototype</code> of the object has been changed earlier from the class it has been inherited from. In that case would those two lines make sense. Hope that helps :)
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1. POPurpose of this Javascript prototype snippet
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1. PTAnswer
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1. USwoofmeow
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1. USwoofmeow
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