@extra-map/subset v2.2.15

Picks an arbitrary subset. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Similar: subset, subsets, isSubset.

This is part of package extra-map.

map.subset(x, [n], [r]);
// x: a map
// n: number of entries (-1 => any)
// r: random seed 0->1

const map = require("extra-map");

var x = new Map([["a", 1], ["b", 2], ["c", 3], ["d", 4]]);
map.subset(x);
// Map(2) { "b" => 2, "c" => 3 }

map.subset(x, 3, 0.3);
// Map(3) { "a" => 1, "b" => 2, "d" => 4 }

map.subset(x, 2, 0.3);
// Map(2) { "b" => 2, "d" => 4 }

References

• shuffle: PHP
• shuffle-seed: @webcaetano
• shuffle-array: @pazguille
• Seeding the random number generator in Javascript