@rxap/utilities/src/lib/range.js

A collection of utility functions, types and interfaces.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Range = exports.RangeIterator = void 0;
class RangeIterator {
    constructor(range, reverse) {
        this.range = range;
        this.reverse = reverse;
        this.position = 0;
    }
    next() {
        const value = this.reverse ? this.range.end - this.position : this.range.start + this.position;
        this.position++;
        const done = this.reverse ? this.range.start === value + 1 : this.range.end === value - 1;
        return {
            value,
            done,
        };
    }
}
exports.RangeIterator = RangeIterator;
class Range {
    constructor(start, end) {
        this.start = start;
        this.end = end;
        if (this.start > this.end) {
            throw new Error(`The range start '${this.start}' must be less then the range end '${this.end}'!`);
        }
    }
    static Create(start, end) {
        return new Range(start, end);
    }
    [Symbol.iterator]() {
        return new RangeIterator(this, false);
    }
    reverse() {
        return {
            [Symbol.iterator]: () => new RangeIterator(this, true),
        };
    }
    toArray() {
        return Array.from(this);
    }
}
exports.Range = Range;
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