44 lines
1.0 KiB
JavaScript
44 lines
1.0 KiB
JavaScript
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export class MapPolyfill {
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constructor() {
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this.size = 0;
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this._values = [];
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this._keys = [];
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}
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get(key) {
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const i = this._keys.indexOf(key);
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return i === -1 ? undefined : this._values[i];
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}
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set(key, value) {
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const i = this._keys.indexOf(key);
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if (i === -1) {
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this._keys.push(key);
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this._values.push(value);
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this.size++;
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}
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else {
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this._values[i] = value;
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}
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return this;
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}
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delete(key) {
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const i = this._keys.indexOf(key);
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if (i === -1) {
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return false;
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}
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this._values.splice(i, 1);
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this._keys.splice(i, 1);
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this.size--;
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return true;
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}
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clear() {
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this._keys.length = 0;
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this._values.length = 0;
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this.size = 0;
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}
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forEach(cb, thisArg) {
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for (let i = 0; i < this.size; i++) {
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cb.call(thisArg, this._values[i], this._keys[i]);
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}
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}
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}
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//# sourceMappingURL=MapPolyfill.js.map
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