fill method
The fill method populates an array
with the given values. The desired value
is specified in the first parameter of the
method. In the second and third optional
parameters, we set the start and end
positions for filling, respectively.
Syntax
array.fill(element, [start position, [end position]]);
Example
Let's populate an array using this method:
let res = [1, 2, 3, 4].fill('!');
console.log(res);
The code execution result:
['!', '!', '!', '!']
Example
Now let's specify from what position we need to fill an array:
let res = ['a', 'b', 'c'].fill('!', 1);
console.log(res);
The code execution result:
['a', '!', '!']
Example
Let's fill an array by specifying, in addition to the initial, also the final position:
let res = ['a', 'b', 'c', 'e'].fill('!', 2, 3);
console.log(res);
The code execution result:
['a', 'b', '!', 'e']
Example
And now let's start filling an array
from the very end, specifying the index
-1 as the second parameter:
let res = ['a', 'b', 'c', 'e'].fill('!', -1);
console.log(res);
The code execution result:
['a', 'b', 'c', '!']
