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rng class..

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Zutatensuppe 2020-12-21 18:34:57 +01:00
parent 3ff375dbb4
commit cbc2b88f47
12 changed files with 4762 additions and 25 deletions
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20
common/Util.js
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@ -1,11 +1,20 @@
import { Rng } from './Rng.js'
// get a unique id
export const uniqId = () => Date.now().toString(36) + Math.random().toString(36).substring(2)
// get a random int between min and max (inclusive)
export const randomInt = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min
export const randomInt = (
/** @type Rng */ rng,
min,
max
) => rng.random(min, max)
// get one random item from the given array
export const choice = (array) => array[randomInt(0, array.length - 1)]
export const choice = (
/** @type Rng */ rng,
array
) => array[randomInt(rng, 0, array.length - 1)]
export const throttle = (fn, delay) => {
let canCall = true
@ -21,11 +30,14 @@ export const throttle = (fn, delay) => {
}
// return a shuffled (shallow) copy of the given array
export const shuffle = (array) => {
export const shuffle = (
/** @type Rng */ rng,
array
) => {
let arr = array.slice()
for (let i = 0; i <= arr.length - 2; i++)
{
const j = randomInt(i, arr.length -1);
const j = randomInt(rng, i, arr.length -1);
const tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;