head - nodef/extra-iterable GitHub Wiki

Get first value.

Similar: head, tail, init, last.

function head(x, vd?)
// x:  an iterable
// vd: default value

const xiterable = require('extra-iterable');

xiterable.head([1, 2, 3]);
// → 1

xiterable.head([], -1);
// → -1

References

• Data.List.head: Haskell