52 lines
1.1 KiB
JavaScript
52 lines
1.1 KiB
JavaScript
module.exports = {
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arraysDiffer: function (a, b) {
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var isDifferent = false;
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if (a.length !== b.length) {
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isDifferent = true;
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} else {
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a.forEach(function (item, index) {
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if (!this.isSame(item, b[index])) {
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isDifferent = true;
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}
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}, this);
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}
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return isDifferent;
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},
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objectsDiffer: function (a, b) {
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var isDifferent = false;
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if (Object.keys(a).length !== Object.keys(b).length) {
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isDifferent = true;
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} else {
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Object.keys(a).forEach(function (key) {
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if (!this.isSame(a[key], b[key])) {
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isDifferent = true;
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}
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}, this);
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}
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return isDifferent;
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},
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isSame: function (a, b) {
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if (typeof a !== typeof b) {
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return false;
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} else if (Array.isArray(a)) {
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return !this.arraysDiffer(a, b);
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} else if (typeof a === 'object' && a !== null && b !== null) {
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return !this.objectsDiffer(a, b);
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}
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return a === b;
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},
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find: function (collection, fn) {
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for (var i = 0, l = collection.length; i < l; i++) {
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var item = collection[i];
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if (fn(item)) {
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return item;
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}
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}
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return null;
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}
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};
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