Groovy Translation

Fair enough. I completely overlooked that

From the kata's description:

but do not begin or end the string with a dash mark.

Not a kata issue.

One of the weird sample tests uses 1 and expects 1, not -1-.

1 is an odd number and so the test should have dashes

Edit: forgot to mention this is the JavaScript version

for Java, I change parameter in function from int to long. There is a test where num = -2147483648

Approved

Approved

C translation (author gone)

Nice Kata

Nice challenge to solve and to figure out by the way.

Done in JS, TS, Ruby and Crystal

Done in latest fork

Some languages do not generate negative numbers in random tests

JS, TS: random tests may generate NaN (when the initial value of randNum == 0).

All current languages fixed.