unique

Removes duplicate values. 🏃 📦 🌔

Alternatives: compare, map.

array.unique(x, [fn]);
// x:  an array
// fn: compare function (a, b)

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

var x = [1, 2, 3, 4, 2, 3];
array.unique(x);
// [1, 2, 3, 4]

var x = [1, 2, 3, 4, -2, -3];
array.unique(x, (a, b) => Math.abs(a) - Math.abs(b));
// [1, 2, 3, 4]

references

• _.uniq(): lodash
• Data.List.nub(): Haskell
• List-Extra.unique(): elm
• List-Extra.uniqueBy(): elm