Challenge 242 solutions by Packy Anderson

 * Raku
 * Perl
 * Python

1 Blog post

1 files changed, 53 insertions, 0 deletions

diff --git a/challenge-242/packy-anderson/python/ch-1.py b/challenge-242/packy-anderson/python/ch-1.py
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+++ b/challenge-242/packy-anderson/python/ch-1.py
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+#!/usr/bin/env python
+
+def comma_join(arr):
+    return ', '.join(map(lambda i: str(i), arr))
+
+def findMissing(source, target, output, explanation):
+    # convert the target into a map with each element as keys
+    targetMap = { x: 1 for x in target }
+
+    # see which elements in the source are not in the target
+    missing = []
+    for elem in source:
+        if not elem in targetMap:
+            missing.append(elem)
+
+    # format output explaining what we found
+    explanation += "\n(" + comma_join(source) + ") has "
+    explanation += str(len(missing))
+    explanation += ' member ' if len(missing) == 1 \
+                              else ' members '
+    if (len(missing) > 0):
+        explanation += '(' + comma_join(missing) + ') '
+        output.append(set(missing))
+    explanation += 'missing from the array '
+    explanation += '(' + comma_join(target) + ')'
+    return explanation
+
+
+def findSolution(arr1, arr2, output):
+    explanation = ''
+    explanation = findMissing(arr1, arr2, output, explanation)
+    explanation = findMissing(arr2, arr1, output, explanation)
+    return explanation
+
+
+def solution(arr1, arr2):
+    print(f'Input: @arr1 = ({comma_join(arr1)})')
+    print(f'       @arr2 = ({comma_join(arr2)})')
+
+    output = []
+    explanation = findSolution(arr1, arr2, output)
+    formatted_subarray = []
+    for subarray in output:
+        formatted_subarray.append('[' + comma_join(subarray) + ']')
+    print(f'Output: ({comma_join(formatted_subarray)})')
+    print(explanation)
+
+
+print('Example 1:')
+solution([1, 2, 3], [2, 4, 6])
+
+print('\nExample 2:')
+solution([1, 2, 3, 3], [1, 1, 2, 2])
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