Gets index range of part of array. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Similar: index, indexRange, size, isEmpty.

This is part of package extra-array.

array.indexRange(x, [i], [I]);
// x: an array
// i: start index (-ve: from right) (0)
// I: end index (-ve: from right) (X)
// → [start index, end index]

const array = require("extra-array");

var x = [2, 4, 6, 8];
array.indexRange(x, 1);
// [1, 4]

array.indexRange(x, 1, -1);
// [1, 3]

array.indexRange(x, 1, -10);
// [1, 1]

References

• Array.prototype.slice: MDN web docs