Array.prototype.fill

Changes all array elements from start to end index to the given value and returns the modified array.

Syntax

fill(value, start?, end?)

Parameters

• value

  A value with which to fill the array.

• start optional

  An index at which to start filling. If negative, it is treated as length + start where length is the length of the array.

• end optional

  An index before which to stop filling. If negative, it is treated as length + end.

Return value

The original modified array.

Examples

Array(4).fill("Na")

[ "Na", "Na", "Na", "Na" ]

[1, 2, 3, 4, 5].fill(0, 1, 4)

[ 1, 0, 0, 0, 5 ]

["A", "B", "C"].fill("X", -2)

[ "A", "X", "X" ]