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54 lines
1.5 KiB
54 lines
1.5 KiB
4 months ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.InternMap = void 0;
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function internGet({ map, initKey }, value) {
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const key = initKey(value);
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return map.has(key) ? map.get(key) : value;
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}
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function internSet({ map, initKey }, value) {
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const key = initKey(value);
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if (map.has(key))
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return map.get(key);
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map.set(key, value);
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return value;
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}
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function internDelete({ map, initKey }, value) {
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const key = initKey(value);
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if (map.has(key)) {
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value = map.get(key);
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map.delete(key);
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}
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return value;
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}
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function keyof(value) {
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return typeof value === 'object' ? value.valueOf() : value;
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}
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/**
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* @see 参考 https://github.com/mbostock/internmap/blob/main/src/index.js
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*/
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class InternMap extends Map {
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constructor(entries) {
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super();
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this.map = new Map();
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this.initKey = keyof;
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if (entries !== null) {
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for (const [key, value] of entries) {
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this.set(key, value);
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}
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}
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}
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get(key) {
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return super.get(internGet({ map: this.map, initKey: this.initKey }, key));
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}
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has(key) {
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return super.has(internGet({ map: this.map, initKey: this.initKey }, key));
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}
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set(key, value) {
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return super.set(internSet({ map: this.map, initKey: this.initKey }, key), value);
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}
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delete(key) {
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return super.delete(internDelete({ map: this.map, initKey: this.initKey }, key));
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}
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}
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exports.InternMap = InternMap;
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//# sourceMappingURL=internMap.js.map
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