| 1 | import { IEnumerable } from "./interface/IEnumerable";
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| 2 | import IEnumerator from "./interface/IEnumerator";
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| 3 |
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| 4 | class CollectionEnumerator<T> implements IEnumerator<T>{
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| 5 | private index = 0;
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| 6 | constructor(private array: Array<T>){
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| 7 | }
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| 8 | next(): IEnumerator<T> {
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| 9 | this.index ++;
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| 10 | return this;
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| 11 | }
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| 12 | get Current() {
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| 13 | return {
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| 14 | value : this.array[this.index],
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| 15 | done : this.array.length > 0 ? this.index === this.array.length - 1 : true,
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| 16 | };
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| 17 | }
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| 18 | }
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| 19 |
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| 20 | export abstract class Collection<T> implements IEnumerable<T>{
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| 21 | getEnumerator(): IEnumerator<T> {
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| 22 | return new CollectionEnumerator(this.toArray());
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| 23 | }
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| 24 | public toArray(){
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| 25 | const arr: Array<T> = [];
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| 26 | this.__iterate((item, index) => {
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| 27 | arr[index] = item;
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| 28 | });
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| 29 | return arr;
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| 30 | }
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| 31 |
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| 32 | protected abstract __iterate(fn: (item: T, index: number) => void): void;
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| 33 | }
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