- Added solutions by Javier Luque.

15 files changed, 1106 insertions, 988 deletions

diff --git a/challenge-042/javier-luque/blog.txt b/challenge-042/javier-luque/blog.txt
new file mode 100644
index 0000000000..b23134bfd4
--- /dev/null
+++ b/challenge-042/javier-luque/blog.txt
@@ -0,0 +1 @@
+https://perlchallenges.wordpress.com/2020/01/06/perl-weekly-challenge-042/
diff --git a/challenge-042/javier-luque/perl/ch-1.pl b/challenge-042/javier-luque/perl/ch-1.pl
new file mode 100644
index 0000000000..5a58151aa2
--- /dev/null
+++ b/challenge-042/javier-luque/perl/ch-1.pl
@@ -0,0 +1,14 @@
+#!/usr/bin/perl
+# Test: ./ch-1.pl
+use strict;
+use warnings;
+use feature qw /say/;
+
+for my $i (1..50) {
+    say 'Decimal '  . $i .
+        ' = Octal ' . to_octal($i);
+}
+
+sub to_octal {
+    return sprintf('%o', shift);
+}
diff --git a/challenge-042/javier-luque/perl/ch-2.pl b/challenge-042/javier-luque/perl/ch-2.pl
new file mode 100644
index 0000000000..04a6078fd6
--- /dev/null
+++ b/challenge-042/javier-luque/perl/ch-2.pl
@@ -0,0 +1,38 @@
+#!/usr/bin/perl
+# test: ./ch2.pl
+use strict;
+use warnings;
+use feature qw /say/;
+use constant {
+    MAX_STRING_LENGTH => 4
+};
+
+for my $i ( 1 .. 20 ) {
+    my $string = generate_random_string();
+    my $ok = (validate_string($string)) ? 'OK ' : 'NOT OK';
+    say $string . ' - ' . $ok;
+}
+
+sub generate_random_string {
+    my $length = int(rand(MAX_STRING_LENGTH - 1) + 2);
+    my $string;
+
+    for my $i (1 .. $length ) {
+        $string .= (int(rand(2))) ? '(' : ')';
+    }
+
+    return $string;
+}
+
+sub validate_string {
+    my $open_p;
+
+    for my $char (split('', shift)) {
+        $open_p++ if ($char eq '(');
+        $open_p-- if ($char eq ')');
+
+        return 0 if ($open_p < 0);
+    }
+
+    return ($open_p == 0);
+}
diff --git a/challenge-042/javier-luque/raku/ch-1.p6 b/challenge-042/javier-luque/raku/ch-1.p6
new file mode 100644
index 0000000000..97022c1f81
--- /dev/null
+++ b/challenge-042/javier-luque/raku/ch-1.p6
@@ -0,0 +1,13 @@
+# Test: perl6 ch-1.p6
+use v6.d;
+
+sub MAIN() {
+    for (1..50) -> $i {
+        say 'Decimal '  ~ $i ~
+            ' = Octal ' ~ to-octal($i);
+    }
+}
+
+sub to-octal(Int $i) {
+    return sprintf('%o', $i);
+}
diff --git a/challenge-042/javier-luque/raku/ch-2.p6 b/challenge-042/javier-luque/raku/ch-2.p6
new file mode 100644
index 0000000000..8d19010e59
--- /dev/null
+++ b/challenge-042/javier-luque/raku/ch-2.p6
@@ -0,0 +1,29 @@
+# Test: perl6 ./ch-2.p6
+use v6.d;
+constant $MAX_STRING_LENGTH = 4;
+
+sub MAIN () {
+    for ( 1 .. 20 ) {
+        my $string = generate-random-string();
+        my $ok = (validate-string($string)) ?? 'OK ' !! 'NOT OK';
+        say $string ~ ' - ' ~ $ok;
+    }
+}
+
+sub generate-random-string {
+    return <( )>.roll(
+        Int((2 .. $MAX_STRING_LENGTH + 1).rand)
+    ).join;
+}
+
+sub validate-string(Str $word) {
+    my $open_p;
+
+    for $word.comb -> $letter {
+        $open_p++ if ($letter eq '(');
+        $open_p-- if ($letter eq ')');
+        return 0 if ($open_p < 0);
+    }
+
+    return ($open_p == 0);
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 164640bb48..cdd8f453e8 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,22 +1,34 @@
 {
-   "title" : {
-      "text" : "Perl Weekly Challenge - 042"
-   },
-   "subtitle" : {
-      "text" : "[Champions: 2] Last updated at 2020-01-06 15:28:32 GMT"
-   },
    "plotOptions" : {
       "series" : {
+         "borderWidth" : 0,
          "dataLabels" : {
             "enabled" : 1,
             "format" : "{point.y}"
-         },
-         "borderWidth" : 0
+         }
       }
    },
    "drilldown" : {
       "series" : [
          {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Javier Luque",
+            "name" : "Javier Luque"
+         },
+         {
             "id" : "Kivanc Yazan",
             "name" : "Kivanc Yazan",
             "data" : [
@@ -27,47 +39,58 @@
             ]
          },
          {
-            "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Simon Proctor"
+            "name" : "Simon Proctor",
+            "id" : "Simon Proctor"
          }
       ]
    },
-   "tooltip" : {
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
-      "followPointer" : 1,
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "xAxis" : {
+      "type" : "category"
    },
    "series" : [
       {
+         "name" : "Perl Weekly Challenge - 042",
          "data" : [
             {
-               "name" : "Kivanc Yazan",
+               "y" : 5,
+               "name" : "Javier Luque",
+               "drilldown" : "Javier Luque"
+            },
+            {
                "y" : 2,
+               "name" : "Kivanc Yazan",
                "drilldown" : "Kivanc Yazan"
             },
             {
-               "name" : "Simon Proctor",
                "y" : 2,
-               "drilldown" : "Simon Proctor"
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor"
             }
          ],
-         "name" : "Perl Weekly Challenge - 042",
          "colorByPoint" : 1
       }
    ],
-   "xAxis" : {
-      "type" : "category"
+   "subtitle" : {
+      "text" : "[Champions: 3] Last updated at 2020-01-06 16:21:07 GMT"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 042"
+   },
+   "tooltip" : {
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : 1
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
    "legend" : {
       "enabled" : 0
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 730a99bdde..678a429aaa 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,35 +1,4 @@
 {
-   "series" : [
-      {
-         "name" : "Contributions",
-         "data" : [
-            [
-               "Blog",
-               444
-            ],
-            [
-               "Perl",
-               1690
-            ],
-            [
-               "Raku",
-               1020
-            ]
-         ],
-         "dataLabels" : {
-            "y" : 10,
-            "rotation" : -90,
-            "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
-            },
-            "enabled" : "true",
-            "format" : "{point.y:.0f}",
-            "color" : "#FFFFFF",
-            "align" : "right"
-         }
-      }
-   ],
    "yAxis" : {
       "title" : {
          "text" : null
@@ -39,6 +8,9 @@
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
    },
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
    "legend" : {
       "enabled" : "false"
    },
@@ -48,16 +20,44 @@
    "xAxis" : {
       "labels" : {
          "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
          }
       },
       "type" : "category"
    },
    "subtitle" : {
-      "text" : "Last updated at 2020-01-06 15:28:32 GMT"
+      "text" : "Last updated at 2020-01-06 16:21:07 GMT"
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
-   }
+   "series" : [
+      {
+         "data" : [
+            [
+               "Blog",
+               445
+            ],
+            [
+               "Perl",
+               1692
+            ],
+            [
+               "Raku",
+               1022
+            ]
+         ],
+         "dataLabels" : {
+            "format" : "{point.y:.0f}",
+            "y" : 10,
+            "align" : "right",
+            "enabled" : "true",
+            "rotation" : -90,
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "color" : "#FFFFFF"
+         },
+         "name" : "Contributions"
+      }
+   ]
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index c8903b4c3e..b353bf32f7 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,244 +1,30 @@
 {
-   "chart" : {
-      "type" : "column"
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "series" : [
-      {
-         "data" : [
-            {
-               "drilldown" : "001",
-               "y" : 140,
-               "name" : "#001"
-            },
-            {
-               "drilldown" : "002",
-               "y" : 109,
-               "name" : "#002"
-            },
-            {
-               "name" : "#003",
-               "drilldown" : "003",
-               "y" : 71
-            },
-            {
-               "name" : "#004",
-               "y" : 91,
-               "drilldown" : "004"
-            },
-            {
-               "drilldown" : "005",
-               "y" : 71,
-               "name" : "#005"
-            },
-            {
-               "y" : 48,
-               "drilldown" : "006",
-               "name" : "#006"
-            },
-            {
-               "name" : "#007",
-               "drilldown" : "007",
-               "y" : 56
-            },
-            {
-               "drilldown" : "008",
-               "y" : 70,
-               "name" : "#008"
-            },
-            {
-               "name" : "#009",
-               "y" : 68,
-               "drilldown" : "009"
-            },
-            {
-               "drilldown" : "010",
-               "y" : 60,
-               "name" : "#010"
-            },
-            {
-               "name" : "#011",
-               "drilldown" : "011",
-               "y" : 79
-            },
-            {
-               "y" : 83,
-               "drilldown" : "012",
-               "name" : "#012"
-            },
-            {
-               "y" : 76,
-               "drilldown" : "013",
-               "name" : "#013"
-            },
-            {
-               "name" : "#014",
-               "y" : 96,
-               "drilldown" : "014"
-            },
-            {
-               "name" : "#015",
-               "y" : 93,
-               "drilldown" : "015"
-            },
-            {
-               "name" : "#016",
-               "y" : 66,
-               "drilldown" : "016"
-            },
-            {
-               "drilldown" : "017",
-               "y" : 79,
-               "name" : "#017"
-            },
-            {
-               "drilldown" : "018",
-               "y" : 76,
-               "name" : "#018"
-            },
-            {
-               "drilldown" : "019",
-               "y" : 95,
-               "name" : "#019"
-            },
-            {
-               "name" : "#020",
-               "drilldown" : "020",
-               "y" : 95
-            },
-            {
-               "name" : "#021",
-               "y" : 67,
-               "drilldown" : "021"
-            },
-            {
-               "name" : "#022",
-               "y" : 63,
-               "drilldown" : "022"
-            },
-            {
-               "name" : "#023",
-               "drilldown" : "023",
-               "y" : 91
-            },
-            {
-               "name" : "#024",
-               "y" : 70,
-               "drilldown" : "024"
-            },
-            {
-               "y" : 55,
-               "drilldown" : "025",
-               "name" : "#025"
-            },
-            {
-               "name" : "#026",
-               "drilldown" : "026",
-               "y" : 70
-            },
-            {
-               "name" : "#027",
-               "drilldown" : "027",
-               "y" : 58
-            },
-            {
-               "name" : "#028",
-               "drilldown" : "028",
-               "y" : 78
-            },
-            {
-               "drilldown" : "029",
-               "y" : 77,
-               "name" : "#029"
-            },
-            {
-               "name" : "#030",
-               "drilldown" : "030",
-               "y" : 115
-            },
-            {
-               "drilldown" : "031",
-               "y" : 87,
-               "name" : "#031"
-            },
-            {
-               "name" : "#032",
-               "drilldown" : "032",
-               "y" : 92
-            },
-            {
-               "y" : 108,
-               "drilldown" : "033",
-               "name" : "#033"
-            },
-            {
-               "name" : "#034",
-               "drilldown" : "034",
-               "y" : 60
-            },
-            {
-               "name" : "#035",
-               "drilldown" : "035",
-               "y" : 60
-            },
-            {
-               "y" : 61,
-               "drilldown" : "036",
-               "name" : "#036"
-            },
-            {
-               "name" : "#037",
-               "drilldown" : "037",
-               "y" : 63
-            },
-            {
-               "name" : "#038",
-               "y" : 60,
-               "drilldown" : "038"
-            },
-            {
-               "name" : "#039",
-               "y" : 60,
-               "drilldown" : "039"
-            },
-            {
-               "y" : 66,
-               "drilldown" : "040",
-               "name" : "#040"
-            },
-            {
-               "name" : "#041",
-               "y" : 67,
-               "drilldown" : "041"
-            },
-            {
-               "drilldown" : "042",
-               "y" : 4,
-               "name" : "#042"
-            }
-         ],
-         "name" : "Perl Weekly Challenge Languages",
-         "colorByPoint" : "true"
-      }
-   ],
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
    "tooltip" : {
-      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
       "headerFormat" : "<span style=\"font-size:11px\"></span>",
-      "followPointer" : "true"
+      "followPointer" : "true",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Language"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "xAxis" : {
+      "type" : "category"
    },
    "drilldown" : {
       "series" : [
          {
+            "name" : "001",
             "id" : "001",
             "data" : [
                [
@@ -253,12 +39,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "001"
+            ]
          },
          {
-            "id" : "002",
-            "name" : "002",
             "data" : [
                [
                   "Perl",
@@ -272,11 +55,13 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "002",
+            "name" : "002"
          },
          {
-            "id" : "003",
             "name" : "003",
+            "id" : "003",
             "data" : [
                [
                   "Perl",
@@ -293,8 +78,8 @@
             ]
          },
          {
-            "id" : "004",
             "name" : "004",
+            "id" : "004",
             "data" : [
                [
                   "Perl",
@@ -329,7 +114,6 @@
             ]
          },
          {
-            "id" : "006",
             "data" : [
                [
                   "Perl",
@@ -344,10 +128,10 @@
                   7
                ]
             ],
-            "name" : "006"
+            "name" : "006",
+            "id" : "006"
          },
          {
-            "id" : "007",
             "data" : [
                [
                   "Perl",
@@ -362,10 +146,10 @@
                   10
                ]
             ],
-            "name" : "007"
+            "name" : "007",
+            "id" : "007"
          },
          {
-            "id" : "008",
             "data" : [
                [
                   "Perl",
@@ -380,10 +164,12 @@
                   12
                ]
             ],
-            "name" : "008"
+            "name" : "008",
+            "id" : "008"
          },
          {
             "name" : "009",
+            "id" : "009",
             "data" : [
                [
                   "Perl",
@@ -397,10 +183,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "009"
+            ]
          },
          {
+            "name" : "010",
             "id" : "010",
             "data" : [
                [
@@ -415,11 +201,11 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "010"
+            ]
          },
          {
             "name" : "011",
+            "id" : "011",
             "data" : [
                [
                   "Perl",
@@ -433,11 +219,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "011"
+            ]
          },
          {
-            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -452,10 +236,10 @@
                   11
                ]
             ],
-            "name" : "012"
+            "name" : "012",
+            "id" : "012"
          },
          {
-            "id" : "013",
             "data" : [
                [
                   "Perl",
@@ -470,11 +254,12 @@
                   13
                ]
             ],
+            "id" : "013",
             "name" : "013"
          },
          {
-            "id" : "014",
             "name" : "014",
+            "id" : "014",
             "data" : [
                [
                   "Perl",
@@ -491,7 +276,6 @@
             ]
          },
          {
-            "id" : "015",
             "data" : [
                [
                   "Perl",
@@ -506,6 +290,7 @@
                   15
                ]
             ],
+            "id" : "015",
             "name" : "015"
          },
          {
@@ -527,6 +312,7 @@
             ]
          },
          {
+            "id" : "017",
             "name" : "017",
             "data" : [
                [
@@ -541,12 +327,11 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "017"
+            ]
          },
          {
-            "id" : "018",
             "name" : "018",
+            "id" : "018",
             "data" : [
                [
                   "Perl",
@@ -563,7 +348,6 @@
             ]
          },
          {
-            "id" : "019",
             "data" : [
                [
                   "Perl",
@@ -578,10 +362,12 @@
                   13
                ]
             ],
+            "id" : "019",
             "name" : "019"
          },
          {
             "name" : "020",
+            "id" : "020",
             "data" : [
                [
                   "Perl",
@@ -595,11 +381,11 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "020"
+            ]
          },
          {
             "name" : "021",
+            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -613,8 +399,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "021"
+            ]
          },
          {
             "data" : [
@@ -635,6 +420,8 @@
             "id" : "022"
          },
          {
+            "id" : "023",
+            "name" : "023",
             "data" : [
                [
                   "Perl",
@@ -648,11 +435,10 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "023",
-            "id" : "023"
+            ]
          },
          {
+            "id" : "024",
             "name" : "024",
             "data" : [
                [
@@ -667,11 +453,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "024"
+            ]
          },
          {
-            "name" : "025",
             "data" : [
                [
                   "Perl",
@@ -686,10 +470,10 @@
                   12
                ]
             ],
-            "id" : "025"
+            "id" : "025",
+            "name" : "025"
          },
          {
-            "id" : "026",
             "data" : [
                [
                   "Perl",
@@ -704,9 +488,11 @@
                   10
                ]
             ],
+            "id" : "026",
             "name" : "026"
          },
          {
+            "name" : "027",
             "id" : "027",
             "data" : [
                [
@@ -721,10 +507,11 @@
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@@ -738,9 +525,7 @@
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@@ -757,12 +542,10 @@
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@@ -776,10 +559,11 @@
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@@ -794,9 +578,12 @@
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@@ -810,11 +597,11 @@
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@@ -828,9 +615,7 @@
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@@ -851,6 +636,7 @@
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@@ -865,12 +651,11 @@
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@@ -923,8 +708,8 @@
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@@ -941,7 +726,6 @@
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@@ -956,11 +740,10 @@
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@@ -974,7 +757,9 @@
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@@ -982,23 +767,20 @@
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@@ -1008,7 +790,225 @@
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