ABPCMS.Web/lib/json2/cycle.js

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/*
    cycle.js
    2016-05-01

    Public Domain.

    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.

    This code should be minified before deployment.
    See http://javascript.crockford.com/jsmin.html

    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
    NOT CONTROL.
*/

/*jslint eval, for */

/*property
    $ref, decycle, forEach, isArray, keys, length, push, retrocycle, stringify,
    test
*/

if (typeof JSON.decycle !== "function") {
    JSON.decycle = function decycle(object, replacer) {
        "use strict";

// Make a deep copy of an object or array, assuring that there is at most
// one instance of each object or array in the resulting structure. The
// duplicate references (which might be forming cycles) are replaced with
// an object of the form

//      {"$ref": PATH}

// where the PATH is a JSONPath string that locates the first occurance.

// So,

//      var a = [];
//      a[0] = a;
//      return JSON.stringify(JSON.decycle(a));

// produces the string '[{"$ref":"$"}]'.

// If a replacer function is provided, then it will be called for each value.
// A replacer function receives a value and returns a replacement value.

// JSONPath is used to locate the unique object. $ indicates the top level of
// the object or array. [NUMBER] or [STRING] indicates a child element or
// property.

        var objects = [];   // Keep a reference to each unique object or array
        var paths = [];     // Keep the path to each unique object or array

        return (function derez(value, path) {

// The derez function recurses through the object, producing the deep copy.

            var i;          // The loop counter
            var nu;         // The new object or array