@extra-array/count

Counts values which satisfy a test. 📦 😺 🏃 📼 🌔 📜 📰 📘

Alternatives: count, countAs.
Similar: count, partition.

This is part of package extra-array.

array.count(x, ft);
// x:  an array
// ft: test function (v, i, x)

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
• Array.count: sugarjs
• count-iterable-values: @zeke