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Просмотр файла: Random.js
/**
* @file Adapted from https://github.com/purescript/purescript-random
*/
import { io } from './IO';
/**
* Returns a random number between 0 (inclusive) and 1 (exclusive). This is a direct wrapper around JavaScript's
* `Math.random()`.
*
* @since 2.0.0
*/
export var random = function () { return Math.random(); };
/**
* Takes a range specified by `low` (the first argument) and `high` (the second), and returns a random integer uniformly
* distributed in the closed interval `[low, high]`. It is unspecified what happens if `low > high`, or if either of
* `low` or `high` is not an integer.
*
* @since 2.0.0
*/
export function randomInt(low, high) {
return io.map(random, function (n) { return Math.floor((high - low + 1) * n + low); });
}
/**
* Returns a random number between a minimum value (inclusive) and a maximum value (exclusive). It is unspecified what
* happens if `maximum < minimum`.
*
* @since 2.0.0
*/
export function randomRange(min, max) {
return io.map(random, function (n) { return (max - min) * n + min; });
}
/**
* Returns a random boolean value with an equal chance of being `true` or `false`
*
* @since 2.0.0
*/
export var randomBool = io.map(random, function (n) { return n < 0.5; });
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