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Update Check_for_palindrome.md

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Angelos Chalaris
2017-12-12 16:22:50 +02:00
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### Check For Palindrome ### Check for palindrome
Steps : Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
1. First Converted to form in which no non-alphanumeric character is present i.e. string which is to be compared Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
2. Then Converted to palindrome form in which characters will be reversed and will be compared to non-alphanumeric string
``` ```
palindrome = str => (str.toLowerCase().replace(/[\W_]/g,'').split('').reverse().join('')==str.toLowerCase().replace(/[\W_]/g,'')); palindrome = str => (str.toLowerCase().replace(/[\W_]/g,'').split('').reverse().join('')==str.toLowerCase().replace(/[\W_]/g,''));