@extra-set/flat v2.2.11

Flattens nested set to given depth. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Alternatives: flat, flatMap.

This is part of package extra-set.

set.flat(x, [n], [fm], [ft]);
// x:  a nested set
// n:  maximum depth (-1 => all)
// fm: map function (v, v, x)
// ft: test function (v, v, x)

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

var x = new Set([
  new Set([1, 2]),
  new Set([3, new Set([4, new Set([5])])])
]);
set.flat(x);
// Set(5) { 1, 2, 3, 4, 5 }

set.flat(x, 1);
// Set(4) { 1, 2, 3, Set(2) { 4, Set(1) { 5 } } }

set.flat(x, 2);
// Set(5) { 1, 2, 3, 4, Set(1) { 5 } }

References

• Array.prototype.flat: MDN web docs
• _.flatten: lodash
• _.flattenDeep: lodash
• _.flattenDepth: lodash
• Array.flatten: sugarjs