@antv/scale
Version:
Toolkit for mapping abstract data into visual representation.
54 lines • 1.56 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.InternMap = void 0;
function internGet({ map, initKey }, value) {
const key = initKey(value);
return map.has(key) ? map.get(key) : value;
}
function internSet({ map, initKey }, value) {
const key = initKey(value);
if (map.has(key))
return map.get(key);
map.set(key, value);
return value;
}
function internDelete({ map, initKey }, value) {
const key = initKey(value);
if (map.has(key)) {
value = map.get(key);
map.delete(key);
}
return value;
}
function keyof(value) {
return typeof value === 'object' ? value.valueOf() : value;
}
/**
* @see 参考 https://github.com/mbostock/internmap/blob/main/src/index.js
*/
class InternMap extends Map {
constructor(entries) {
super();
this.map = new Map();
this.initKey = keyof;
if (entries !== null) {
for (const [key, value] of entries) {
this.set(key, value);
}
}
}
get(key) {
return super.get(internGet({ map: this.map, initKey: this.initKey }, key));
}
has(key) {
return super.has(internGet({ map: this.map, initKey: this.initKey }, key));
}
set(key, value) {
return super.set(internSet({ map: this.map, initKey: this.initKey }, key), value);
}
delete(key) {
return super.delete(internDelete({ map: this.map, initKey: this.initKey }, key));
}
}
exports.InternMap = InternMap;
//# sourceMappingURL=internMap.js.map