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hydrogen-web/src/observable/map.js

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2019-02-21 04:18:16 +05:30
import BaseObservableMap from "./map/BaseObservableMap.js";
export default class ObservableMap extends BaseObservableMap {
constructor(initialValues) {
super();
this._values = new Map(initialValues);
}
update(key, params) {
const value = this._values.get(key);
if (value !== undefined) {
this._values.add(key, value);
this.emitChange(key, value, params);
return true;
}
return false; // or return existing value?
}
add(key, value) {
if (!this._values.has(key)) {
this._values.add(key, value);
this.emitAdd(key, value);
return true;
}
return false; // or return existing value?
}
remove(key) {
const value = this._values.get(key);
if (value !== undefined) {
this._values.delete(key);
this.emitRemove(key, value);
return true;
} else {
return false;
}
}
reset() {
this._values.clear();
this.emitReset();
}
get(key) {
return this._values.get(key);
}
get size() {
return this._values.size;
}
[Symbol.iterator]() {
return this._values.entries()[Symbol.iterator];
}
}