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POAny standard JavaScript library for transforming JS objects
 

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  1. POAny standard JavaScript library for transforming JS objects
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    <p>I have a complex nested JavaScript object with me. The requirement is to flatten out the object completely or only some of the members in it.</p> <pre><code>var obj = { a: { b: { c: { d: "Varun" }, e: "kumar" } } }; </code></pre> <p>The expected resultant object:</p> <pre><code>{d: "Varun", e: "kumar"} </code></pre> <p>I have written a simple transform utility which will accept the accessor map in the form {"a.b.c.d": "d"} and transform the object into the new object. I am not supporting arrays for now. Also, the transform utility can only reduce a complex object into a simpler one and not vice-versa (ie. construct a new member object from a simple member). </p> <pre><code>"use strict"; var ObjectUtil = (function () { // constructor var cls = function () { }; // public static cls.getValueFromAccessor = function (obj, accessor) { if (obj == null || accessor == null) return null; return accessor.split(".").reduce(function(prev, current, index) { var reducedObject = prev; if (index == 1) reducedObject = obj[prev]; if (reducedObject == null) return null; return reducedObject[current]; }); }; cls.transform = function(obj, accessorMap, overlay) { var result; if (overlay) result = obj; else result = {}; for (var k in accessorMap) { result[accessorMap[k]] = cls.getValueFromAccessor(obj, k); } return result; }; return cls; })(); var obj = { a: { b: { c: { d: "Varun" }, e: "kumar" } } }; var accessorMap = { "a.b.c.d": "d", "a.b.e": "e" } ObjectUtil.getValueFromAccessor(obj, "a.b.c.d"); console.log(ObjectUtil.transform(obj, accessorMap, false)); console.log(ObjectUtil.transform(obj, accessorMap, true)); </code></pre> <p>Is there a standard way of transforming objects from one form to another. Any libraries available for this?</p>
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    1. PTQuestion
    1. USVarunkumar Nagarajan
    1. USVarunkumar Nagarajan
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    1. CO[There is no such thing as a "JSON object"](http://benalman.com/news/2010/03/theres-no-such-thing-as-a-json/). Your problem has *nothing* to do with JSON *at all*. And JavaScript doesn't have a standard library.
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      1. POAny standard JavaScript library for transforming JS objects
      1. USFelix Kling
    2. COYes, I understand that. My bad for using them interchangeably.
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      1. POAny standard JavaScript library for transforming JS objects
      1. USVarunkumar Nagarajan
 

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