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POJavascript: How to turn a JSON array of object back in to the Object type sharing prototypes?
 

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  1. POJavascript: How to turn a JSON array of object back in to the Object type sharing prototypes?
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    <p>If you have an array of product objects created from JSON, how would you add a prototype method to the product objects so that they all point to the same method? How would you train JavaScript to recognize all product objects in an array are instances of the same class without recreating them?</p> <p>If I pull down a JSON array of Products for example, and want each product in the array to have a prototype method, how would I add the single prototype method to each copy of Product?</p> <p>I first thought to have a Product constructor that takes product JSON data as a parameter and returns a new Product with prototypes, etc. which would replace the data send from the server. I would think this would be impractical because you are recreating the objects. We just want to add functions common to all objects.</p> <p>Is it possible to <code>$.extend</code> an object's prototype properties to the JSON object so that each JSON object would refer to exactly the same functions (not a copy of)?</p> <p>For example:</p> <pre><code>var Products = []; Products[0] = {}; Products[0].ID = 7; Products[0].prototype.GetID = function() { return this.ID; }; Products[1].ID = 8; Products[1].prototype = Products[0].prototype; // ?? </code></pre> <p>I know that looks bad, but what if you JQuery <code>$.extend</code> the methods to each Product object prototype: create an object loaded with prototypes then <code>$.extend</code> that object over the existing Product objects? How would you code that? What are the better possibilities?</p>
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    1. USZachary Scott
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    1. CONo such thing as a JSON object.
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      1. POJavascript: How to turn a JSON array of object back in to the Object type sharing prototypes?
      1. USFélix Saparelli
    2. COSeems like you'd need to do what people have to do in the strongly-typed world, and have a cooperative JSON parser that you could control somehow. Like, if every time it needed to construct a sub-object, instead of just using `{}` it would call a callback and pass you some information about the context. Then you could have your own code instantiate an object in whatever way you needed and return it to the parser.
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      1. USPointy
    3. COYou may want to read up on how JSON works. JSON is a data exchange format, it's not an object. You don't create an object from JSON, you parse JSON and the method creates an object from the representation. Your solution of feeding in data to an initializer method makes much more sense.
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      1. USMario
 

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