54 lines
1.3 KiB
JavaScript
54 lines
1.3 KiB
JavaScript
'use strict';
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var safeIsNaN = Number.isNaN ||
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function ponyfill(value) {
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return typeof value === 'number' && value !== value;
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};
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function isEqual(first, second) {
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if (first === second) {
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return true;
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}
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if (safeIsNaN(first) && safeIsNaN(second)) {
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return true;
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}
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return false;
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}
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function areInputsEqual(newInputs, lastInputs) {
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if (newInputs.length !== lastInputs.length) {
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return false;
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}
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for (var i = 0; i < newInputs.length; i++) {
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if (!isEqual(newInputs[i], lastInputs[i])) {
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return false;
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}
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}
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return true;
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}
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function memoizeOne(resultFn, isEqual) {
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if (isEqual === void 0) { isEqual = areInputsEqual; }
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var cache = null;
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function memoized() {
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var newArgs = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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newArgs[_i] = arguments[_i];
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}
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if (cache && cache.lastThis === this && isEqual(newArgs, cache.lastArgs)) {
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return cache.lastResult;
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}
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var lastResult = resultFn.apply(this, newArgs);
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cache = {
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lastResult: lastResult,
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lastArgs: newArgs,
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lastThis: this,
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};
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return lastResult;
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}
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memoized.clear = function clear() {
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cache = null;
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};
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return memoized;
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}
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module.exports = memoizeOne;
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