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Set default limit value

This commit is contained in:
pyoor 2018-08-27 18:57:39 -04:00
parent 942d9d89ba
commit ba33374c65
1 changed files with 2 additions and 6 deletions
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8
lib/random/random.js
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@ -12,22 +12,18 @@ class random {
*/ */
static init (seed = new Date().getTime()) { static init (seed = new Date().getTime()) {
random.twister = new MersenneTwister() random.twister = new MersenneTwister()
random.twister.seed(random.seed) random.twister.seed(seed)
} }
/** /**
* Returns an integer in [0, limit) (uniform distribution) * Returns an integer in [0, limit) (uniform distribution)
* @param {number} limit * @param {number} limit
*/ */
static number (limit) { static number (limit = 0xffffffff) {
if (!random.twister) { if (!random.twister) {
throw new Error('random.init must be called first.') throw new Error('random.init must be called first.')
} }
if (limit === null || limit === undefined) {
limit = 0xffffffff
}
let x = (0x100000000 / limit) >>> 0 let x = (0x100000000 / limit) >>> 0
let y = (x * limit) >>> 0 let y = (x * limit) >>> 0
let r let r