| 1 | "use strict";
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| 2 | var typeObj = require("../lang/isType");
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| 3 | var isFunction = typeObj.isFunction;
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| 4 | var toString = Object.prototype.toString;
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| 5 | function eq(a, b, aStack, bStack) {
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| 6 | if (a === b)
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| 7 | return a !== 0 || 1 / a === 1 / b;
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| 8 | if (a == null || b == null)
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| 9 | return false;
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| 10 | if (a !== a)
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| 11 | return b !== b;
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| 12 | if (typeof a !== 'function' && typeof a !== 'object' && typeof b != 'object')
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| 13 | return false;
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| 14 | return deepEqual(a, b, aStack, bStack);
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| 15 | }
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| 16 | function deepEqual(a, b, aStack, bStack) {
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| 17 | if (aStack === void 0) { aStack = []; }
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| 18 | if (bStack === void 0) { bStack = []; }
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| 19 | var className = toString.call(a);
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| 20 | if (className !== toString.call(b))
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| 21 | return false;
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| 22 | switch (className) {
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| 23 | case '[object RegExp]':
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| 24 | case '[object String]':
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| 25 | return '' + a === '' + b;
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| 26 | case '[object Number]':
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| 27 | if (+a !== +a)
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| 28 | return +b !== +b;
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| 29 | return +a === 0 ? 1 / +a === 1 / b : +a === +b;
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| 30 | case '[object Date]':
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| 31 | case '[object Boolean]':
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| 32 | return +a === +b;
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| 33 | case '[object Symbol]':
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| 34 | return Symbol.prototype.valueOf.call(a) === Symbol.prototype.valueOf.call(b);
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| 35 | }
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| 36 | var areArrays = className === '[object Array]';
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| 37 | if (!areArrays) {
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| 38 | if (typeof a != 'object' || typeof b != 'object')
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| 39 | return false;
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| 40 | var aCtor = a.constructor;
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| 41 | var bCtor = b.constructor;
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| 42 | if (aCtor !== bCtor && !(isFunction(aCtor) && aCtor instanceof aCtor
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| 43 | && isFunction(bCtor) && bCtor instanceof bCtor)) {
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| 44 | return false;
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| 45 | }
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| 46 | }
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| 47 | var length = aStack.length;
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| 48 | while (length--) {
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| 49 | if (aStack[length] === a)
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| 50 | return bStack[length] === b;
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| 51 | }
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| 52 | aStack.push(a);
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| 53 | bStack.push(b);
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| 54 | if (areArrays) {
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| 55 | var length_1 = a.length;
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| 56 | if (length_1 !== b.length)
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| 57 | return false;
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| 58 | while (length_1--) {
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| 59 | if (!eq(a[length_1], b[length_1], aStack, bStack))
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| 60 | return false;
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| 61 | }
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| 62 | }
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| 63 | else {
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| 64 | var keys = Object.keys(a);
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| 65 | var key = void 0;
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| 66 | var length_2 = keys.length;
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| 67 | if (Object.keys(b).length !== length_2)
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| 68 | return false;
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| 69 | while (length_2--) {
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| 70 | key = keys[length_2];
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| 71 | if (!(b.hasOwnProperty(key) && eq(a[key], b[key], aStack, bStack)))
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| 72 | return false;
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| 73 | }
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| 74 | }
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| 75 | aStack.pop();
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| 76 | bStack.pop();
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| 77 | return true;
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| 78 | }
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| 79 | module.exports = eq;
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| 80 | |
| \ | No newline at end of file |