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