From b896a71040c1e32394257fcb53f3e0c5a845829a Mon Sep 17 00:00:00 2001
From: Paulo Custodio <pauloscustodio@gmail.com>
Date: Fri, 2 Apr 2021 23:50:36 +0100
Subject: Add Perl solution to challenge 106

---
 challenge-106/paulo-custodio/perl/ch-1.pl  | 40 +++++++++++++++++++++++++++
 challenge-106/paulo-custodio/perl/ch-2.pl  | 44 ++++++++++++++++++++++++++++++
 challenge-106/paulo-custodio/t/test-1.yaml | 30 ++++++++++++++++++++
 challenge-106/paulo-custodio/t/test-2.yaml | 20 ++++++++++++++
 challenge-106/paulo-custodio/test.pl       |  7 +++++
 5 files changed, 141 insertions(+)
 create mode 100644 challenge-106/paulo-custodio/perl/ch-1.pl
 create mode 100644 challenge-106/paulo-custodio/perl/ch-2.pl
 create mode 100644 challenge-106/paulo-custodio/t/test-1.yaml
 create mode 100644 challenge-106/paulo-custodio/t/test-2.yaml
 create mode 100644 challenge-106/paulo-custodio/test.pl

diff --git a/challenge-106/paulo-custodio/perl/ch-1.pl b/challenge-106/paulo-custodio/perl/ch-1.pl
new file mode 100644
index 0000000000..3ffc4020ff
--- /dev/null
+++ b/challenge-106/paulo-custodio/perl/ch-1.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/perl
+
+# Challenge 106
+#
+# TASK #1 › Maximum Gap
+# Submitted by: Mohammad S Anwar
+# You are given an array of integers @N.
+# 
+# Write a script to display the maximum difference between two successive
+# elements once the array is sorted.
+# 
+# If the array contains only 1 element then display 0.
+# 
+# Example
+# Input: @N = (2, 9, 3, 5)
+# Output: 4
+# 
+# Input: @N = (1, 3, 8, 2, 0)
+# Output: 5
+# 
+# Input: @N = (5)
+# Output: 0
+
+use Modern::Perl;
+
+my @N = @ARGV;
+say max_gap(@N);
+
+sub max_gap {
+    my(@n) = @_;
+    return 0 if @n < 2;
+    @n = sort @n;
+    
+    my $max_gap = 0;
+    for my $i (0..$#n-1) {
+        my $gap = $n[$i+1] - $n[$i];
+        $max_gap = $gap if $gap > $max_gap;
+    }
+    return $max_gap;
+}
diff --git a/challenge-106/paulo-custodio/perl/ch-2.pl b/challenge-106/paulo-custodio/perl/ch-2.pl
new file mode 100644
index 0000000000..020663f23f
--- /dev/null
+++ b/challenge-106/paulo-custodio/perl/ch-2.pl
@@ -0,0 +1,44 @@
+#!/usr/bin/perl
+
+# TASK #2 › Decimal String
+# Submitted by: Mohammad S Anwar
+# You are given numerator and denominator i.e. $N and $D.
+# 
+# Write a script to convert the fraction into decimal string. If the fractional
+# part is recurring then put it in parenthesis.
+# 
+# Example
+# Input: $N = 1, $D = 3
+# Output: "0.(3)"
+# 
+# Input: $N = 1, $D = 2
+# Output: "0.5"
+# 
+# Input: $N = 5, $D = 66
+# Output: "0.0(75)"
+
+use Modern::Perl;
+use Math::BigFloat;
+
+my($N, $D) = @ARGV;
+say decimal($N, $D);
+
+sub decimal {
+    my($n,$d) = @_;
+
+    Math::BigFloat->round_mode('trunc');    # so that 1/6=0.16666
+    Math::BigFloat->accuracy(1000);         # very long list of digits
+    
+    my $N = Math::BigFloat->new($n);
+    my $D = Math::BigFloat->new($d);
+    my $Q = $N->copy()->bdiv($D);
+    $Q =~ s/(\.\d+?)0+$/$1/;                # remove 00000 from 2.30000
+    
+    # naive solution: finds repetitions by string match
+    for my $rept (1..100) {
+        my $code = "return \$Q if \$Q =~ s/((\\d{$rept})\\2+)\\d*?\$/\\(\$2\\)/;";
+        eval $code;
+    }
+    # no repetitions
+    return $Q;
+}
diff --git a/challenge-106/paulo-custodio/t/test-1.yaml b/challenge-106/paulo-custodio/t/test-1.yaml
new file mode 100644
index 0000000000..7f4993223e
--- /dev/null
+++ b/challenge-106/paulo-custodio/t/test-1.yaml
@@ -0,0 +1,30 @@
+- setup:
+  cleanup:
+  args:     
+  input:
+  output:   0
+- setup:
+  cleanup:
+  args:     2
+  input:
+  output:   0
+- setup:
+  cleanup:
+  args:     2 9
+  input:
+  output:   7
+- setup:
+  cleanup:
+  args:     2 9 3
+  input:
+  output:   6
+- setup:
+  cleanup:
+  args:     2 9 3 5
+  input:
+  output:   4
+- setup:
+  cleanup:
+  args:     1 3 8 2 0
+  input:
+  output:   5
diff --git a/challenge-106/paulo-custodio/t/test-2.yaml b/challenge-106/paulo-custodio/t/test-2.yaml
new file mode 100644
index 0000000000..ae19b9024d
--- /dev/null
+++ b/challenge-106/paulo-custodio/t/test-2.yaml
@@ -0,0 +1,20 @@
+- setup:
+  cleanup:
+  args:     1 3
+  input:
+  output:   0.(3)
+- setup:
+  cleanup:
+  args:     1 2
+  input:
+  output:   0.5
+- setup:
+  cleanup:
+  args:     5 66
+  input:
+  output:   0.0(75)
+- setup:
+  cleanup:
+  args:     89 7
+  input:
+  output:   12.(714285)
diff --git a/challenge-106/paulo-custodio/test.pl b/challenge-106/paulo-custodio/test.pl
new file mode 100644
index 0000000000..01ed2b83cd
--- /dev/null
+++ b/challenge-106/paulo-custodio/test.pl
@@ -0,0 +1,7 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use 5.030;
+
+require '../../challenge-001/paulo-custodio/test.pl';
-- 
cgit