head

Gets first value. 🏃 📼 📦 🌔 📒

Similar: head, tail.

set.head(x, [vd]);
// x:  a set
// vd: default value

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

var x = new Set([1, 2, 3]);
set.head(x);
// 1

var x = new Set();
set.head(x);
// undefined

references

• Data.List.head: Haskell
• _.head: lodash
• Array.first: sugarjs