Write a recursive version of the palindrome function. It should ignore non-letters and case. (Hint: use isalpha() .)
The function signature is:
def is_palindrome(s): """ ------------------------------------------------------- Recursively determines if s is a palindrome. Ignores non-letters and case. Use: palindrome = is_palindrome(s) ------------------------------------------------------- Parameters: s - a string (str) Returns: palindrome - True if s is a palindrome, False otherwise (boolean) ------------------------------------------------------- """
def is_palindrome(s): """ ------------------------------------------------------- Recursively determines if s is a palindrome. Ignores non-letters and case. Use: palindrome = is_palindrome(s) ------------------------------------------------------- Parameters: s - a string (str) Returns: palindrome - True if s is a palindrome, False otherwise (boolean) ------------------------------------------------------- """ if len(s) <= 1: return True else: if not s[0].isalpha(): return is_palindrome(s[1:]) elif not s[-1].isalpha(): return is_palindrome(s[:-1]) if s[0].lower() != s[len(s) - 1].lower(): return False else: return is_palindrome(s[1:-1])
Write a recursive version of the palindrome function. It should ignore non-letters and case. (Hint: use...
Please read the problem carefully and answer the 2 questions
below
code:
/*****************************************************************
* Program: palindrome.c
*
* Purpose: implements a recursive function for determining
* if a string is a palindrome
*
* Authors: Steven R. Vegdahl, Tammy VanDeGrift, Martin Cenek
*
*****************************************************************/
#include
#include
#include
/*****************************************************************
* is_palindrome - determines whether a string of characters is a
palindrome
*
* calling sequence:
* result = is_palindrome(str, first_index,
last_index)
*
* parameters -
* str - the string to test
* first_index -...
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