_.fill

Fills elements of array with value from start up to, but not including, end.Note that fill is a mutable method in both native and Lodash/Underscore.

// Underscore/Lodash
var array = [1, 2, 3]
 
_.fill(array, 'a')
 
console.log(array)
// output: ['a', 'a', 'a']
 
_.fill(Array(3), 2)
// output: [2, 2, 2]
 
_.fill([4, 6, 8, 10], '*', 1, 3)
// output: [4, '*', '*', 10]
 
// Native
var array = [1, 2, 3]
 
array.fill('a')
 
console.log(array)
// output: ['a', 'a', 'a']
 
Array(3).fill(2)
// output: [2, 2, 2]
 
[4, 6, 8, 10].fill('*', 1, 3)
// output: [4, '*', '*', 10]

Browser Support for Array.prototype.fill()

45.0 ✔	✔	31.0 ✔	✖	32.0 ✔	8 ✔