30 lines
555 B
TypeScript
30 lines
555 B
TypeScript
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/*!
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* This Source Code Form is subject to the terms of the Mozilla Public License,
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* v. 2.0. If a copy of the MPL was not distributed with this file, You can
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* obtain one at http://mozilla.org/MPL/2.0/.
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*/
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export class _Mapping<T> {
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table: T[];
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map: Map<T, number>;
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constructor() {
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this.table = [];
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this.map = new Map();
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}
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add(item: T) {
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if (this.map.has(item)) {
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return;
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}
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const id = this.table.length;
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this.table.push(item);
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this.map.set(item, id);
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}
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get(item: T): number | undefined {
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return this.map.get(item);
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}
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}
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