@newdash/newdash/random.js

javascript/typescript utility library

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.random = void 0;
const isIterateeCall_1 = __importDefault(require("./.internal/isIterateeCall"));
const toFinite_1 = __importDefault(require("./toFinite"));
/**
 * Built-in method references without a dependency on `root`.
 * @internal
 * @ignore
 * @private
 */
const freeParseFloat = parseFloat;
/**
 * The base implementation of `random` without support for returning
 * floating-point numbers.
 *
 * @private
 * @ignore
 * @internal
 * @param lower The lower bound.
 * @param upper The upper bound.
 * @returns  Returns the random number.
 */
function baseRandom(lower, upper) {
    return lower + Math.floor(Math.random() * (upper - lower + 1));
}
function random(lower = 0, upper = 1, floating) {
    if (floating && typeof floating != "boolean" && (0, isIterateeCall_1.default)(lower, upper, floating)) {
        upper = floating = undefined;
    }
    if (floating === undefined) {
        if (typeof upper == "boolean") {
            floating = upper;
            upper = undefined;
        }
        else if (typeof lower == "boolean") {
            floating = lower;
            lower = undefined;
        }
    }
    if (lower === undefined && upper === undefined) {
        lower = 0;
        upper = 1;
    }
    else {
        lower = (0, toFinite_1.default)(lower);
        if (upper === undefined) {
            upper = lower;
            lower = 0;
        }
        else {
            upper = (0, toFinite_1.default)(upper);
        }
    }
    if (lower > upper) {
        const temp = lower;
        lower = upper;
        upper = temp;
    }
    if (floating || lower % 1 || upper % 1) {
        const rand = Math.random();
        return Math.min(lower + (rand * (upper - lower + freeParseFloat(`1e-${(`${rand}`).length - 1}`))), upper);
    }
    return baseRandom(lower, upper);
}
exports.random = random;
exports.default = random;