36 lines
934 B
JavaScript
36 lines
934 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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var copyValue = function (value, ancestors, ancestorsCopy) {
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var mode;
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if (isPlainObject(value)) mode = "object";
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else if (isArray(value)) mode = "array";
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if (!mode) return value;
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var copy = ancestorsCopy[ancestors.indexOf(value)];
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if (copy) return copy;
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copy = mode === "object" ? {} : [];
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ancestors.push(value);
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ancestorsCopy.push(copy);
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if (mode === "object") {
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forEach(value, function (item, key) {
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copy[key] = copyValue(item, ancestors, ancestorsCopy);
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});
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} else {
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value.forEach(function (item, index) {
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copy[index] = copyValue(item, ancestors, ancestorsCopy);
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});
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}
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ancestors.pop();
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ancestorsCopy.pop();
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return copy;
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};
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module.exports = function (source) { return copyValue(ensureValue(source), [], []); };
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