30 lines
802 B
JavaScript
30 lines
802 B
JavaScript
export default function memoize(callback) {
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let previous;
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let result;
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return function () {
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let hasChanged = false;
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for (var _len = arguments.length, dependencies = new Array(_len), _key = 0; _key < _len; _key++) {
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dependencies[_key] = arguments[_key];
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}
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if (previous) {
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if (previous.length !== dependencies.length) {
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hasChanged = true;
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} else {
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for (let i = 0; i < previous.length; i++) {
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if (previous[i] !== dependencies[i]) {
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hasChanged = true;
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break;
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}
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}
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}
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} else {
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hasChanged = true;
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}
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previous = dependencies;
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if (hasChanged || result === undefined) {
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result = callback(...dependencies);
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}
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return result;
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};
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}
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//# sourceMappingURL=memoize.js.map
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