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, -1);
// -1

References

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