simple-jsrange/dist/charRange.js

Simple range function for JavaScript

"use strict";

var chars = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];

var forwardCharRange = function forwardCharRange(start, end, options) {
    var step = options.step,
        inc = options.inc;

    var res = [];
    var startIdx = chars.indexOf(start);
    var endIdx = chars.indexOf(end);

    if (inc) {
        for (var i = startIdx; i <= endIdx; i += step) {
            res.push(chars[i]);
        }
    } else {
        for (var _i = startIdx; _i < endIdx; _i += step) {
            res.push(chars[_i]);
        }
    }

    return res;
};

var reverseCharRange = function reverseCharRange(start, end, options) {
    var step = options.step,
        inc = options.inc;

    var res = [];
    var startIdx = chars.indexOf(start);
    var endIdx = chars.indexOf(end);

    if (inc) {
        for (var i = startIdx; i >= endIdx; i -= step) {
            res.push(chars[i]);
        }
    } else {
        for (var _i2 = startIdx; _i2 > endIdx; _i2 -= step) {
            res.push(chars[_i2]);
        }
    }
    return res;
};

var charRange = function charRange(start, end, options) {
    if (start < end) {
        return forwardCharRange(start, end, options);
    }
    return reverseCharRange(start, end, options);
};

module.exports = { charRange: charRange };