sgreen solutions to challenge 283

7 files changed, 140 insertions, 2 deletions

diff --git a/challenge-283/sgreen/README.md b/challenge-283/sgreen/README.md
index eff69133e3..a1791d3a25 100644
--- a/challenge-283/sgreen/README.md
+++ b/challenge-283/sgreen/README.md
@@ -1,3 +1,3 @@
-# The Weekly Challenge 282
+# The Weekly Challenge 283
 
-Blog: [Good keys](https://dev.to/simongreennet/good-keys-2elk)
+Blog: [Weekly Challenge 283](https://dev.to/simongreennet/weekly-challenge-283-102h)
diff --git a/challenge-283/sgreen/blog.txt b/challenge-283/sgreen/blog.txt
new file mode 100644
index 0000000000..883e2d2ae4
--- /dev/null
+++ b/challenge-283/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/weekly-challenge-283-102h
\ No newline at end of file
diff --git a/challenge-283/sgreen/perl/ch-1.pl b/challenge-283/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..7a69bc8d06
--- /dev/null
+++ b/challenge-283/sgreen/perl/ch-1.pl
@@ -0,0 +1,29 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+sub main (@ints) {
+    # Calculate the frequency of each integer
+    my %freq = ();
+    foreach my $int (@ints) {
+        $freq{$int}++;
+    }
+
+    # Get the integers that appear only once
+    my @only_once = grep { $freq{$_} == 1 } keys %freq;
+
+    if ( $#only_once == 0 ) {
+        say $only_once[0];
+    }
+    elsif ( $#only_once == -1 ) {
+        say 'No values only appear once';
+    }
+    else {
+        say 'More than one value appears once';
+    }
+}
+
+main(@ARGV);
\ No newline at end of file
diff --git a/challenge-283/sgreen/perl/ch-2.pl b/challenge-283/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..709644de65
--- /dev/null
+++ b/challenge-283/sgreen/perl/ch-2.pl
@@ -0,0 +1,28 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+sub main (@ints) {
+    # Calculate the frequency of each integer
+    my %freq = ();
+    foreach my $int (@ints) {
+        $freq{$int}++;
+    }
+
+    while ( my ( $idx, $value ) = each(@ints) ) {
+        # Check the index only appear value number of times
+        if ( ( $freq{$idx} // 0 ) != $value ) {
+            say 'false';
+            return;
+        }
+    }
+
+    # Checks pass
+    say 'true';
+
+}
+
+main(@ARGV);
\ No newline at end of file
diff --git a/challenge-283/sgreen/python/ch-1.py b/challenge-283/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..7f5ed66cd7
--- /dev/null
+++ b/challenge-283/sgreen/python/ch-1.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+from collections import Counter
+import sys
+
+
+def unique_number(ints: list) -> int:
+    # Calculate the frequency of each integer
+    freq = Counter(ints)
+
+    # Get the integers that appear only once
+    only_once = [i for i in freq if freq[i] == 1]
+
+    if len(only_once) == 1:
+        return only_once[0]
+
+    if len(only_once) == 0:
+        raise ValueError('No values only appear once')
+
+    raise ValueError('More than one value appears once')
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    result = unique_number(array)
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-283/sgreen/python/ch-2.py b/challenge-283/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..978ad41f6d
--- /dev/null
+++ b/challenge-283/sgreen/python/ch-2.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+from collections import Counter
+import sys
+
+
+def digit_count_value(ints: list) -> bool:
+    # Calculate the frequency of each integer
+    freq = Counter(ints)
+
+    for idx, value in enumerate(ints):
+        # Check the index only appear value number of times
+        if freq[idx] != value:
+            return False
+
+    # Checks pass
+    return True
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    result = digit_count_value(array)
+    print('true' if result else 'false')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-283/sgreen/python/test.py b/challenge-283/sgreen/python/test.py
new file mode 100755
index 0000000000..9073c9d954
--- /dev/null
+++ b/challenge-283/sgreen/python/test.py
@@ -0,0 +1,21 @@
+#!/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.unique_number([3, 3, 1]), 1)
+        self.assertEqual(ch_1.unique_number([3, 2, 4, 2, 4]), 3)
+        self.assertEqual(ch_1.unique_number([1]), 1)
+        self.assertEqual(ch_1.unique_number([4, 3, 1, 1, 1, 4]), 3)
+
+    def test_ch_2(self):
+        self.assertTrue(ch_2.digit_count_value([1, 2, 1, 0]))
+        self.assertFalse(ch_2.digit_count_value([0, 3, 0]))
+
+
+if __name__ == '__main__':
+    unittest.main()