All files / data/src queue.ts

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import { isEmpty } from "@jga/arrays";
 
// FIFO implementation
// @src https://basarat.gitbook.io/algorithms/datastructures/queue
 
export class Queue<Element> {
    private readonly store: Element[] = [];
 
    public push(item: Element): number {
        return this.store.push(item);
    }
 
    public pop(): Element | undefined {
        return this.store.shift();
    }
 
    public size(): number {
        return this.store.length;
    }
 
    public peek(): Element | undefined {
        return isEmpty(this.store) ? undefined : this.store[0];
    }
}