Write a function that takes a random number as input and converts it into an array with the digits of that number appearing in reverse order.
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Top comments (16)
It checks if it's a positive number, then turns it into a string, separate the characters and reverse them. If the parameter is not valid, it returns null.
This will process numbers that some people may not consider valid as they contain characters different than digits (e.g.
Also having those
||like that is not pretty... don't do it :P
The result should be an array of numbers but this yields an array of strings.
Maybe consider adding
Assuming the input should be a positive integer as in the test cases.
Using modulo and division should make it an O(n) solution, n being the number of digits in the number.
We could also have used the
toStringmethod from the
Number.prototypeand then use a spread operator into an array, and then use the
Array.prototype.reversemethod to reverse each one of its digits, but that would have made the function run in O(n³) space I believe.
Python one liner
dude, I don't think the input to the function is a string.
Whoops, looks like someone didn't specify the base of the number :o
Rust one liner: