1 var baseRandom = require('./_baseRandom'),
2 isIterateeCall = require('./_isIterateeCall'),
3 toNumber = require('./toNumber');
5 /** Built-in method references without a dependency on `root`. */
6 var freeParseFloat = parseFloat;
8 /* Built-in method references for those with the same name as other `lodash` methods. */
9 var nativeMin = Math.min,
10 nativeRandom = Math.random;
13 * Produces a random number between the inclusive `lower` and `upper` bounds.
14 * If only one argument is provided a number between `0` and the given number
15 * is returned. If `floating` is `true`, or either `lower` or `upper` are floats,
16 * a floating-point number is returned instead of an integer.
18 * **Note:** JavaScript follows the IEEE-754 standard for resolving
19 * floating-point values which can produce unexpected results.
24 * @param {number} [lower=0] The lower bound.
25 * @param {number} [upper=1] The upper bound.
26 * @param {boolean} [floating] Specify returning a floating-point number.
27 * @returns {number} Returns the random number.
31 * // => an integer between 0 and 5
34 * // => also an integer between 0 and 5
37 * // => a floating-point number between 0 and 5
40 * // => a floating-point number between 1.2 and 5.2
42 function random(lower, upper, floating) {
43 if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
44 upper = floating = undefined;
46 if (floating === undefined) {
47 if (typeof upper == 'boolean') {
51 else if (typeof lower == 'boolean') {
56 if (lower === undefined && upper === undefined) {
61 lower = toNumber(lower) || 0;
62 if (upper === undefined) {
66 upper = toNumber(upper) || 0;
74 if (floating || lower % 1 || upper % 1) {
75 var rand = nativeRandom();
76 return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
78 return baseRandom(lower, upper);
81 module.exports = random;