43 lines
963 B
JavaScript
43 lines
963 B
JavaScript
"use strict";
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var forEach = require("./for-each")
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, isPlainObject = require("./is-plain-object")
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, ensureValue = require("./valid-value")
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, isArray = Array.isArray
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, copy
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, copyItem;
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copyItem = function (value) {
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var index;
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if (!isPlainObject(value) && !isArray(value)) return value;
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index = this[0].indexOf(value);
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if (index === -1) return copy.call(this, value);
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return this[1][index];
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};
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copy = function (source) {
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var target = isArray(source) ? [] : {};
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this[0].push(source);
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this[1].push(target);
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if (isArray(source)) {
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source.forEach(function (value, key) {
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target[key] = copyItem.call(this, value, key);
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}, this);
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} else {
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forEach(
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source,
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function (value, key) {
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target[key] = copyItem.call(this, value, key);
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},
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this
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);
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}
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return target;
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};
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module.exports = function (source) {
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var obj = Object(ensureValue(source));
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if (obj !== source) return obj;
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return copy.call([[], []], obj);
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};
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