@extra-entries/count-as.min NPM

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

Alternatives: count, countAs.
This is part of package extra-entries.

This is browserified, minified version of @extra-entries/count-as. It is exported as global variable entries_countAs. CDN: unpkg, jsDelivr.

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

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

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

var x = [["a", 1], ["b", 2], ["c", 3], ["d", 4]];
entries.countAs(x, v => v % 2);
// Map(2) { 1 => 2, 0 => 2 }