Strings & Text

Ruby Palindrome Checker (Words & Phrases)

Check if a string is a palindrome in Ruby using clean standard methods and regular expressions.

Ruby Source Code

Editable code sample with line numbers

Ruby

Expected Output

When this program is compiled and executed, the terminal outputs:

'Madam' => PALINDROME
'Racecar' => PALINDROME
'ZenCompiler' => NOT A PALINDROME
'Was it a car or a cat I saw?' => PALINDROME

How the Code Works

Ruby provides expressive string methods like downcase, gsub with regex, and reverse. Comparing the sanitized string with its reverse tests palindrome equality cleanly.

Time Complexity

O(N)

Space Complexity

O(N)

Key Takeaways & Best Practices

Ruby method names ending in ? conventionally return boolean values.
gsub(/[^a-z0-9]/, "") strips non-alphanumeric characters.

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