shift$ - nodef/extra-array GitHub Wiki
Remove first value!
Alternatives: shift, shift$. Similar: push, pop, shift, unshift.
function shift$(x)
// x: an array (updated!)
const xarray = require('extra-array');
var x = [1, 2, 3];
xarray.shift$(x);
// → [ 2, 3 ]
x;
// → [ 2, 3 ]
var x = [1, 2, 3, 4];
xarray.shift$(x);
// → [ 2, 3, 4 ]