random-sum-float

create random float number array by size, sum, min, max

install

1npm install random-sum-float

API

1declare function randomSumFloat(size: number, sum?: number, min?: number, max?: number): number[];
2declare namespace randomSumFloat {
3    var create: (size: number, sum?: number, min?: number, max?: number, noUnique?: boolean, limit?: number) => () => number[];
4    var randomSumFloat: typeof randomSumFloat;
5    var default: typeof randomSumFloat;
6}
7export = randomSumFloat;

demo

1import randomSumFloat from 'random-sum-float';
2
3let size = 3;
4let sum = 10;
5let min = 1;
6let max = 10;
7
8/**
9 * recommend way, otherwise will slow
10 */
11let fn = randomSumFloat.create(size, sum, min, max);
12let v: number[];
13
14v = fn();
15
16console.log(v, array_sum(v));
17// => [ 2.828736460774711, 5.763831427698853, 1.407432111526436 ] 10
18
19/**
20 * will slow if not same [size, sum, min, max]
21 */
22v = randomSumFloat(size, sum, min, max);
23// => [ 1.0521188269862214, 4.661026586341693, 4.286854586672085 ] 10
24
25console.log(v, array_sum(v));
26
27/**
28 * auto create sum
29 */
30v = randomSumFloat(size, null, min, max);
31// => [ 3.9067266610605182, 4.259092854483752, 3.834180484455729 ] 12
32
33console.log(v, array_sum(v));
34
35/**
36 * auto create sum v2
37 */
38v = randomSumFloat(size);
39// => [ 0.3641343986242387, 0.4843074708676399, 0.1515581305081214 ] 1
40
41console.log(v, array_sum(v));
42
43v = randomSumFloat(size, 0, -5, 10);
44// => [ 2.879740922080848, -0.4913386492777585, -2.3884022728030896 ] 0
45
46console.log(v, array_sum(v));
47
48v = randomSumFloat(size, -10, -5, 10);
49// => [ -4.429865487852505, -3.5847740400416157, -1.9853604721058797 ] -10
50
51console.log(v, array_sum(v));
52
53export function array_sum(na: number[])
54{
55	return na.reduce((a, b) => a + b)
56}