count

Counts values which satisfy a test. 🏃 📼 📦 🌔

Alternatives: one, all.

array.count(x, fn, [ths]);
// x:   an array
// fn:  test function (v, i, x)
// ths: this argument

const array = require('extra-array');

var x = [1, 1, 2, 2, 4];
array.count(x, v => v % 2 === 1);
// 2

array.count(x, v => v % 2 === 0);
// 3

references

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