The slice() method returns a copy of a portion of an array.
It takes two parameters, arr.slice([begin[, end]])
:
Zero-based index which is the beginning of extraction.
Zero-based index which is the end of extraction, slicing up to this index but it's not included.
If the end is a negative number,end = arr.length + end
.
// Let's say we have this Array of Alphabets
var arr = ["a", "b", "c", "d"...];
// I want an Array of the first two Alphabets
var newArr = arr.slice(0, 2); // newArr === ["a", "b"]
// Let's say we have this Array of Numbers
// and I don't know it's end
var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9...];
// I want to slice this Array starting from
// number 5 to its end
var newArr = arr.slice(4); // newArr === [5, 6, 7, 8, 9...]