js slice in place code example
Example 1: javascript slice array
// array.slice(start, end)
const FRUITS = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = FRUITS.slice(1, 3);
// citrus => [ 'Orange', 'Lemon' ]
// Negative values slice in the opposite direction
var fromTheEnd = FRUITS.slice(-3, -1);
// fromTheEnd => [ 'Lemon', 'Apple' ]
Example 2: use of slice and splice add elements array
function frankenSplice(arr1, arr2, n) {
// Create a copy of arr2.
let combinedArrays = arr2.slice()
// [4, 5, 6]
// Insert all the elements of arr1 into arr2 beginning
// at the index specified by n. We're using the spread
// operator "..." to insert each individual element of
// arr1 instead of the whole array.
combinedArrays.splice(n, 0, ...arr1)
// (1, 0, ...[1, 2, 3])
// [4, 1, 2, 3, 5, 6]
// Return the combined arrays.
return combinedArrays
}
frankenSplice([1, 2, 3], [4, 5, 6], 1);