Challenge 288 solutions by Packy Anderson

  * Raku that maybe looks like Raku, but mostly like Perl
  * Perl
  * Python that definitely looks like Perl
  * Elixir solution for Task 1 (for now)

1 Blog post

1 files changed, 39 insertions, 0 deletions

diff --git a/challenge-288/packy-anderson/python/ch-1.py b/challenge-288/packy-anderson/python/ch-1.py
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+#!/usr/bin/env python
+
+def isPalindrome(num):
+  # convert numerics to Strings, then reverse one of them
+  return str(num) == str(num)[::-1]
+
+def closestPalindrome(string):
+  num = int(string)
+  distance = 1
+  while True:
+    # is the smaller number at this distance a palindrome?
+    if isPalindrome(num - distance):
+      return str(num - distance)
+
+    # is the larger number at this distance a palindrome?
+    if isPalindrome(num + distance):
+      return str(num + distance)
+
+    # step 1 number futher away
+    distance += 1
+
+def solution(string):
+    print(f'Input: $str = "{string}"')
+    print(f'Output: "{closestPalindrome(string)}"')
+
+print('Example 1:')
+solution("123")
+
+print('\nExample 2:')
+solution("2")
+
+print('\nExample 3:')
+solution("1400")
+
+print('\nExample 4:')
+solution("1001")
+
+print('\nExample 5: (it doesn\'t say the input is a POSITIVE int)')
+solution("-1")