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+#!/usr/bin/python3
+# https://theweeklychallenge.org/blog/perl-weekly-challenge-245/#TASK1
+#
+# Task 1: Sort Language
+# =====================
+#
+# You are given two array of languages and its popularity.
+#
+# Write a script to sort the language based on popularity.
+# Example 1
+#
+# Input: @lang = ('perl', 'c', 'python')
+#        @popularity = (2, 1, 3)
+# Output: ('c', 'perl', 'python')
+#
+# Example 2
+#
+# Input: @lang = ('c++', 'haskell', 'java')
+#        @popularity = (1, 3, 2)
+# Output: ('c++', 'java', 'haskell')
+#
+############################################################
+##
+## discussion
+##
+############################################################
+#
+# The solution that jumps right into my face is to fill the data
+# into a hash table, using lang as the key and popularity as the
+# value. Then sort the keys by their values and put the result into
+# the output.
+
+def sort_language(lang: list, popularity: list):
+    print("Input: (", ", ".join(str(x) for x in lang), "), (", ", ".join(str(x) for x in popularity), ")")
+    hash = {}
+    for i in range(len(lang)):
+        hash[lang[i]] = popularity[i]
+    print("Output: (", ", ".join(str(x) for x in sorted(hash, key=hash.get)), ")")
+
+sort_language( ['perl', 'c', 'python'], [2, 1, 3] );
+sort_language( ['c++', 'haskell', 'java'], [1, 3, 2] );
+