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rubypalindrome

RubyMonk, Palindrome

Learning Ruby, currently doing the palindrome method creator on Ruby Monk.

Basically, write a method that returns true if a string is indeed a palindrome.

This is my code.

def palindrome?(sentence)

sentence.downcase!


array_1 = sentence.split("")

array_2 = sentence.reverse.split("")

if array_1 == array_2
    true
else
    false
end
end

p palindrome?("NeverOddOrEven")

It works, but only if there are no spaces between each word.

So if you check "Never Odd Or Even" (as opposed to "NeverOddOrEven") it fails.

How should I fix this?

Thanks!

Solution

  • Add:

    sentence.gsub!/\W/, ''

    just after sentence.downcase!

    Also note, that your method has a side effect:

    string = 'NeverOddOrEven'
p palindrome?(string)   #=> true
p string                #=> neveroddoreven

    To fix this, change first two lines to:

    sentence = sentence.downcase.gsub /\W/, ''