25 lines
506 B
TypeScript
25 lines
506 B
TypeScript
|
export class ChangeList<T>{
|
||
|
|
private set = new Set<T>;
|
||
|
|
|
||
|
|
public get changeCount() {
|
||
|
|
return this.set.size;
|
||
|
|
}
|
||
|
|
|
||
|
|
public get hasChanges() {
|
||
|
|
return this.changeCount > 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
public handleChange(item: T) {
|
||
|
|
if (!this.set.delete(item))
|
||
|
|
this.set.add(item);
|
||
|
|
}
|
||
|
|
|
||
|
|
public getChanges() {
|
||
|
|
return this.set.values();
|
||
|
|
}
|
||
|
|
|
||
|
|
public map<R>(mapper: (v: T, idx: number, arr: T[]) => R): R[] {
|
||
|
|
return [...this.getChanges()].map(mapper);
|
||
|
|
}
|
||
|
|
}
|