diff options
Diffstat (limited to 'node_modules/lodash/random.js')
-rw-r--r-- | node_modules/lodash/random.js | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/node_modules/lodash/random.js b/node_modules/lodash/random.js new file mode 100644 index 0000000..8067711 --- /dev/null +++ b/node_modules/lodash/random.js @@ -0,0 +1,82 @@ +var baseRandom = require('./_baseRandom'), + isIterateeCall = require('./_isIterateeCall'), + toFinite = require('./toFinite'); + +/** Built-in method references without a dependency on `root`. */ +var freeParseFloat = parseFloat; + +/* Built-in method references for those with the same name as other `lodash` methods. */ +var nativeMin = Math.min, + nativeRandom = Math.random; + +/** + * Produces a random number between the inclusive `lower` and `upper` bounds. + * If only one argument is provided a number between `0` and the given number + * is returned. If `floating` is `true`, or either `lower` or `upper` are + * floats, a floating-point number is returned instead of an integer. + * + * **Note:** JavaScript follows the IEEE-754 standard for resolving + * floating-point values which can produce unexpected results. + * + * @static + * @memberOf _ + * @since 0.7.0 + * @category Number + * @param {number} [lower=0] The lower bound. + * @param {number} [upper=1] The upper bound. + * @param {boolean} [floating] Specify returning a floating-point number. + * @returns {number} Returns the random number. + * @example + * + * _.random(0, 5); + * // => an integer between 0 and 5 + * + * _.random(5); + * // => also an integer between 0 and 5 + * + * _.random(5, true); + * // => a floating-point number between 0 and 5 + * + * _.random(1.2, 5.2); + * // => a floating-point number between 1.2 and 5.2 + */ +function random(lower, upper, floating) { + if (floating && typeof floating != 'boolean' && isIterateeCall(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 = toFinite(lower); + if (upper === undefined) { + upper = lower; + lower = 0; + } else { + upper = toFinite(upper); + } + } + if (lower > upper) { + var temp = lower; + lower = upper; + upper = temp; + } + if (floating || lower % 1 || upper % 1) { + var rand = nativeRandom(); + return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper); + } + return baseRandom(lower, upper); +} + +module.exports = random; |