1 module.exports = function (obj, opts) {
3 if (typeof opts === 'function') opts = { cmp: opts };
4 var space = opts.space || '';
5 if (typeof space === 'number') space = Array(space+1).join(' ');
6 var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
7 var replacer = opts.replacer || function(key, value) { return value; };
9 var cmp = opts.cmp && (function (f) {
10 return function (node) {
11 return function (a, b) {
12 var aobj = { key: a, value: node[a] };
13 var bobj = { key: b, value: node[b] };
20 return (function stringify (parent, key, node, level) {
21 var indent = space ? ('\n' + new Array(level + 1).join(space)) : '';
22 var colonSeparator = space ? ': ' : ':';
24 if (node && node.toJSON && typeof node.toJSON === 'function') {
28 node = replacer.call(parent, key, node);
30 if (node === undefined) {
33 if (typeof node !== 'object' || node === null) {
34 return JSON.stringify(node);
38 for (var i = 0; i < node.length; i++) {
39 var item = stringify(node, i, node[i], level+1) || JSON.stringify(null);
40 out.push(indent + space + item);
42 return '[' + out.join(',') + indent + ']';
45 if (seen.indexOf(node) !== -1) {
46 if (cycles) return JSON.stringify('__cycle__');
47 throw new TypeError('Converting circular structure to JSON');
51 var keys = objectKeys(node).sort(cmp && cmp(node));
53 for (var i = 0; i < keys.length; i++) {
55 var value = stringify(node, key, node[key], level+1);
59 var keyValue = JSON.stringify(key)
63 out.push(indent + space + keyValue);
65 seen.splice(seen.indexOf(node), 1);
66 return '{' + out.join(',') + indent + '}';
68 })({ '': obj }, '', obj, 0);
71 var isArray = Array.isArray || function (x) {
72 return {}.toString.call(x) === '[object Array]';
75 var objectKeys = Object.keys || function (obj) {
76 var has = Object.prototype.hasOwnProperty || function () { return true };
78 for (var key in obj) {
79 if (has.call(obj, key)) keys.push(key);