@extra-set/count-as v2.2.11

Counts occurrences of values. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Alternatives: count, countAs.

This is part of package extra-set.

set.countAs(x, fm);
// x:  a set
// fm: map function (v, v, x)
// → Map {value => count}

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

var x = new Set([1, 2, 3, 4, 5]);
set.countAs(x, v => v % 3);
// Map(3) { 1 => 2, 2 => 2, 0 => 1 }

set.countAs(x, v => v % 2);
// Map(2) { 1 => 3, 0 => 2 }

References

• List-Extra.count: elm
• _.countBy: lodash
• count-iterable-values: @zeke