@ndn/util/lib/reorder_node.js

NDNts: general utilities

/** Reorder items according to their index numbers. */
export class Reorder {
    next;
    buffer = new Map();
    constructor(first = 0) {
        this.next = first;
    }
    /** Return number of items in buffer. */
    get size() { return this.buffer.size; }
    /** Determine whether buffer is empty, i.e. all items emitted. */
    get empty() { return this.buffer.size === 0; }
    /** Add a new item. */
    push(index, obj) {
        if (index >= this.next) {
            this.buffer.set(index, obj);
        }
    }
    /** Return and remove in-order items. */
    shift() {
        const result = [];
        while (this.buffer.has(this.next)) {
            result.push(this.buffer.get(this.next));
            this.buffer.delete(this.next);
            ++this.next;
        }
        return result;
    }
}