Array slice

Using .slice()

Here is an example of using slice.

js

const books = [
  'Things Fall Apart',
  'Beloved',
  'One Hundred Years of Solitude',
  'The God of Small Things',
  'Persepolis'
]

console.log(books.slice(1, 4))

output

[
  'Beloved',
  'One Hundred Years of Solitude',
  'The God of Small Things'
]

TIP

When using .slice(a, b), the item at index a is included, but the item at index b is not.

With one argument

If slice is called with one argument, it slices to the end of the array.

js

const books = [
  'Things Fall Apart',
  'Beloved',
  'One Hundred Years of Solitude',
  'The God of Small Things',
  'Persepolis'
]

console.log(books.slice(2))

output

[
  'One Hundred Years of Solitude',
  'The God of Small Things',
  'Persepolis'
]

Negative indices

If we pass a negative index, the indices count from the end of the array, with -1 representing the index of the final item.

js

const books = [
  'Things Fall Apart',
  'Beloved',
  'One Hundred Years of Solitude',
  'The God of Small Things',
  'Persepolis'
]

console.log(books.slice(-2))

output

[ 'The God of Small Things', 'Persepolis' ]