CoffeeScript function: Check whether a passed string is a palindrome or not
CoffeeScript Function : Exercise-10 with Solution
Write a CoffeeScript function that checks whether a passed string is a palindrome or not?
Note: A palindrome is a word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run.
HTML Code :
<!DOCTYPE html> <html> <head> <meta charset="utf-8">+ <script src="//jashkenas.github.io/coffee-script/extras/coffee-script.js"></script> <title>Check whether a passed string is a palindrome or not</title> </head> <body> </body> </html>
CoffeeScript Code :
check_Palindrome = (str_entry) -> # Change the string into lower case and remove all non-alphanumeric characters cstr = str_entry.toLowerCase().replace(/[^a-zA-Z0-9]+/g, '') ccount = 0 # Check whether the string is empty or not if cstr == '' console.log 'Nothing found!' return false # Check if the length of the string is even or odd if cstr.length % 2 == 0 ccount = cstr.length / 2 else # If the length of the string is 1 then it becomes a palindrome if cstr.length == 1 console.log 'Entry is a palindrome.' return true else # If the length of the string is odd ignore middle character ccount = (cstr.length - 1) / 2 # Loop through to check the first character to the last character and then move next x = 0 while x < ccount # Compare characters and drop them if they do not match if cstr[x] != cstr.slice(-1 - x) alert 'Entry is not a palindrome.' return false x++ console.log 'The entry is a palindrome.' true check_Palindrome 'madam' check_Palindrome 'nurses run' check_Palindrome 'fox'
"The entry is a palindrome." "The entry is a palindrome." "Entry is not a palindrome."
Live Demo :
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