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40 lines
1.1 KiB
40 lines
1.1 KiB
4 years ago
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"use strict";
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var strCompare = require("../string/#/case-insensitive-compare")
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, isObject = require("./is-object")
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, isValue = require("./is-value")
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, numIsNaN = require("../number/is-nan")
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, resolve
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, typeMap;
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typeMap = { undefined: 0, object: 1, boolean: 2, string: 3, number: 4 };
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resolve = function (a) {
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if (isObject(a)) {
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if (typeof a.valueOf !== "function") return NaN;
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a = a.valueOf();
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if (isObject(a)) {
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if (typeof a.toString !== "function") return NaN;
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a = a.toString();
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if (typeof a !== "string") return NaN;
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}
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}
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return a;
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};
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module.exports = function (val1, val2) {
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if (val1 === val2) return 0; // Same
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val1 = resolve(val1);
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val2 = resolve(val2);
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// eslint-disable-next-line eqeqeq
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if (val1 == val2) return typeMap[typeof val1] - typeMap[typeof val2];
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if (!isValue(val1)) return -1;
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if (!isValue(val2)) return 1;
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if (typeof val1 === "string" || typeof val2 === "string") {
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return strCompare.call(val1, val2);
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}
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if (numIsNaN(val1) && numIsNaN(val2)) return 0; // Jslint: ignore
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return Number(val1) - Number(val2);
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};
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