Codewars CSV representation of array

Описание

Create a function that returns the CSV representation of a two-dimensional numeric array.

Example:

input:
[[ 0, 1, 2, 3, 4 ],
[ 10,11,12,13,14 ],
[ 20,21,22,23,24 ],
[ 30,31,32,33,34 ]]

output:
'0,1,2,3,4\n'
+'10,11,12,13,14\n'
+'20,21,22,23,24\n'
+'30,31,32,33,34'

Array's length more then 2.


More details here: https://en.wikipedia.org/wiki/Comma-separated_values
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