JavaScript tips — Initialize an array with a given value using Array.fill

Need to create an array of a given size where all the entries in it have been initialized to a given number or string value? Just use the new Array constructor and the fill method:

new Array(size).fill(initialValue)

This also works for typed arrays, such as Uint8Array. It is much more concise (and faster) than doing this with a for loop yourself

#javascript