60 lines
1.5 KiB
JavaScript
60 lines
1.5 KiB
JavaScript
"use strict";
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var eq = require("./eq")
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, isPlainObject = require("./is-plain-object")
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, value = require("./valid-value");
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var isArray = Array.isArray
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, keys = Object.keys
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, objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable
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, objHasOwnProperty = Object.prototype.hasOwnProperty
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, eqArr
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, eqVal
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, eqObj;
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eqArr = function (arr1, arr2, recMap) {
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var i, length = arr1.length;
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if (length !== arr2.length) return false;
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for (i = 0; i < length; ++i) {
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if (objHasOwnProperty.call(arr1, i) !== objHasOwnProperty.call(arr2, i)) return false;
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if (!eqVal(arr1[i], arr2[i], recMap)) return false;
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}
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return true;
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};
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eqObj = function (obj1, obj2, recMap) {
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var k1 = keys(obj1), k2 = keys(obj2);
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if (k1.length !== k2.length) return false;
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return k1.every(function (key) {
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if (!objPropertyIsEnumerable.call(obj2, key)) return false;
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return eqVal(obj1[key], obj2[key], recMap);
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});
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};
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eqVal = function (val1, val2, recMap) {
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var i, eqX, c1, c2;
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if (eq(val1, val2)) return true;
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if (isPlainObject(val1)) {
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if (!isPlainObject(val2)) return false;
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eqX = eqObj;
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} else if (isArray(val1) && isArray(val2)) {
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eqX = eqArr;
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} else {
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return false;
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}
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c1 = recMap[0];
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c2 = recMap[1];
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i = c1.indexOf(val1);
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if (i === -1) {
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i = c1.push(val1) - 1;
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c2[i] = [];
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} else if (c2[i].indexOf(val2) !== -1) return true;
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c2[i].push(val2);
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return eqX(val1, val2, recMap);
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};
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module.exports = function (val1, val2) {
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if (eq(value(val1), value(val2))) return true;
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return eqVal(Object(val1), Object(val2), [[], []]);
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};
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