Gets a part of array.
This is part of package extra-array.
array.slice(x, [i], [I]);
// x: an array
// i: start index (0)
// I: end index (X)
const array = require("extra-array");
var x = [1, 2, 3, 4, 5];
array.slice(x, 2);
// [ 3, 4, 5 ]
array.slice(x, 2, 4);
// [ 3, 4 ]
array.slice(x, -3, -1);
// [ 3, 4 ]