JavaScript Array Type

Modification

We can replace an element at an index using the same syntax as when we extracted elements using their index.

Copy
identifier[index] = anotherElement

If we specify and index outside of the array's bounds, the array will expand to a length such that the newly given index is that last element. All elements between the previous last element and the new one will be undefined.

Code example

Copy
const quote = [
  "I",
  "write",
  "these",
  "words",
  "in",
  "steel,",
  "for",
  "anything",
  "not",
  "set",
  "in",
  "metal",
  "cannot",
  "be",
  "trusted.",
]

quote[5] = "wood,"
quote[11] = "wood"