HackerRank Ruby - Strings - Methods I problem solution

In this HackerRank Ruby - Strings - Methods I problem solution In this challenge, your task is to code a process_text method, which takes an array of strings as input and returns a single joined string with all flanking whitespace and new lines removed. Each string has to be separated by a single space.

> process_text(["Hi, \n", " Are you having fun?    "])

"Hi, Are you having fun?"

Problem solution.

# Enter your code here. Read input from STDIN. Print output to STDOUT

def process_text arr
    clean_arr = []
    arr.each do | l |
      l = l.chomp
      l = l.strip
      clean_arr << l
    end
    clean_arr.join( " " )
end

Second solution.

# Enter your code here. Read input from STDIN. Print output to STDOUT
def process_text(arr)
    new_arr = arr.map { |x| x.strip }.join(" ")
end

Third solution.

# Enter your code here. Read input from STDIN. Print output to STDOUT

def process_text(arr = [])
    arr.map(&:chomp).map(&:strip).join(' ')
end