Merge pull request #9885 from simongreen-net/master

sgreen solutions to challenge 263

7 files changed, 143 insertions, 2 deletions

diff --git a/challenge-263/sgreen/README.md b/challenge-263/sgreen/README.md
index 9a3b6396b1..933fe5f90e 100644
--- a/challenge-263/sgreen/README.md
+++ b/challenge-263/sgreen/README.md
@@ -1,3 +1,3 @@
-# The Weekly Challenge 262
+# The Weekly Challenge 263
 
-Blog: [The maximum divisible](https://dev.to/simongreennet/the-maximum-divisible-4mm6)
+Blog: [Finding the target](https://dev.to/simongreennet/finding-the-target-26em)
diff --git a/challenge-263/sgreen/blog.txt b/challenge-263/sgreen/blog.txt
new file mode 100644
index 0000000000..bc7351d593
--- /dev/null
+++ b/challenge-263/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/finding-the-target-26em
\ No newline at end of file
diff --git a/challenge-263/sgreen/perl/ch-1.pl b/challenge-263/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..a73bc61e89
--- /dev/null
+++ b/challenge-263/sgreen/perl/ch-1.pl
@@ -0,0 +1,21 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+sub main (@ints) {
+    # The last value is $k
+    my $k = pop(@ints);
+
+    # Sort the rest of the array
+    @ints = sort { $a <=> $b } @ints;
+
+    # Return the indexes where the item is 'k'
+    my @result = grep { $ints[$_] == $k } ( 0 .. $#ints );
+
+    say '(', join( ', ', @result ), ')';
+}
+
+main(@ARGV);
\ No newline at end of file
diff --git a/challenge-263/sgreen/perl/ch-2.pl b/challenge-263/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..491df1cd59
--- /dev/null
+++ b/challenge-263/sgreen/perl/ch-2.pl
@@ -0,0 +1,36 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+use JSON qw(decode_json encode_json);
+
+sub merge_items(@arrays) {
+    # Calculate the total of each items
+    my %totals = ();
+    foreach my $array (@arrays) {
+        foreach my $item (@$array) {
+            my ( $item_id, $item_qty ) = @$item;
+            $totals{$item_id} += $item_qty;
+        }
+    }
+
+    # Turn this into a sorted list of item_id and item_qty pairs
+    return [ map { [ $_, $totals{$_} ] } ( sort { $a <=> $b } keys(%totals) ) ];
+}
+
+sub main (@array) {
+    # Convert each input into a list of lists
+    my @inputs = ();
+    foreach my $json_str (@array) {
+        push @inputs, decode_json($json_str);
+    }
+
+    # Do the challenge
+    my $result = merge_items(@inputs);
+    say encode_json($result);
+}
+
+main(@ARGV);
\ No newline at end of file
diff --git a/challenge-263/sgreen/python/ch-1.py b/challenge-263/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..5f1e0be8fb
--- /dev/null
+++ b/challenge-263/sgreen/python/ch-1.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def target_index(ints: list, k: int) -> list:
+    # Sort the array
+    ints = sorted(ints)
+
+    # Return the indexes where the item is 'k'
+    return [pos for pos, value in enumerate(ints) if value == k]
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    k = array.pop()
+    result = target_index(array, k)
+    print('(' + ', '.join(map(str, result)) + ')')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-263/sgreen/python/ch-2.py b/challenge-263/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..a3a6d6a181
--- /dev/null
+++ b/challenge-263/sgreen/python/ch-2.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+from collections import defaultdict
+import json
+import sys
+
+
+def merge_items(*arrays) -> list:
+    # Calculate the total of each items
+    totals = defaultdict(int)
+    for array in arrays:
+        for item in array:
+            item_id, item_qty = item
+            totals[item_id] += item_qty
+
+    # Turn this into a sorted list of item_id and item_qty pairs
+    return [[item, totals[item]] for item in sorted(totals)]
+
+
+def main():
+    # Convert each input into a list of lists
+    arrays = []
+    for json_str in sys.argv[1:]:
+        arrays.append(json.loads(json_str))
+    result = merge_items(*arrays)
+    print(json.dumps(result))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-263/sgreen/python/test.py b/challenge-263/sgreen/python/test.py
new file mode 100755
index 0000000000..46adb6e558
--- /dev/null
+++ b/challenge-263/sgreen/python/test.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+import unittest
+ch_1 = __import__('ch-1')
+ch_2 = __import__('ch-2')
+
+
+class TestClass(unittest.TestCase):
+    def test_ch_1(self):
+        self.assertEqual(ch_1.target_index([1, 5, 3, 2, 4, 2], 2), [1, 2])
+        self.assertEqual(ch_1.target_index([1, 2, 4, 3, 5], 6), [])
+        self.assertEqual(ch_1.target_index([5, 3, 2, 4, 2, 1], 4), [4])
+
+    def test_ch_2(self):
+        self.assertEqual(
+            ch_2.merge_items([[1, 1], [2, 1], [3, 2]], [[2, 2], [1, 3]]),
+            [[1, 4], [2, 3], [3, 2]]
+        )
+        self.assertEqual(
+            ch_2.merge_items([[1, 2], [2, 3], [1, 3], [3, 2]], [[3, 1], [1, 3]]),
+            [[1, 8], [2, 3], [3, 3]]
+        )
+        self.assertEqual(
+            ch_2.merge_items([[1, 1], [2, 2], [3, 3]], [[2, 3], [2, 4]]),
+            [[1, 1], [2, 9], [3, 3]]
+        )
+
+
+if __name__ == '__main__':
+    unittest.main()