Technical Interview: Create a function that inserts a dot (".") between each character of a string. There shouldn't be a dot at the beginning or the end of the string, just in between characters.

Question

Nicu Listana · Accepted Answer

Straightforward 1-liner solution using ruby array library:

def insertDots(str)
	if (str != '')
		str[0] + str.split('')[1..-2].map{|a| a.to_s + '.'}.join('') + str[-1];
	end
end

insertDots('adddots');

Cheers!

Some Random Guy · Answer

def insert_dots(str)
  str.chars.join('.')
end

insert_dots('hello')
=> "h.e.l.l.o"

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