One-Liner Puzzle - Fill Array with indices

#javascript #puzzles #array #fundamentals

Premise

Write a function f, that receives an integer n and returns a new Array of size n and which contains in each entry the index i. For example:

f(0) => []
f(3) => [0, 1, 2]
f(5) => [0, 1, 2, 3, 4]

Constraints

all code in one line
max allowed bytes/characters is 36
no underscore/lodash/libraries, just vanilla JS
ES6 is recommended
assume all inputs of n to be greater or equal 0 and lower than Number.MAX_SAFE_INTEGER
no performance considerations for this puzzle

Spoiler alert

If you like to solve on your own, please avoid the comment section until you solved it or (hopefully not) give up.

Hints

you should not target for "clean" code
omit variable declarations
remove any whitespace where you can
start with a working implementation and narrow down
if you are totally new to this appraoch, try my introduction to one-liners

Have fun!

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