- Added solutions by Laurent Rosenfeld.

15 files changed, 952 insertions, 792 deletions

diff --git a/challenge-006/laurent-rosenfeld/blog.txt b/challenge-006/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..54d90dc3a7
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+http://blogs.perl.org/users/laurent_r/2019/05/perl-weekly-challenge-6-compact-number-ranges.html
diff --git a/challenge-006/laurent-rosenfeld/perl5/ch-1.pl b/challenge-006/laurent-rosenfeld/perl5/ch-1.pl
new file mode 100644
index 0000000000..43773de58d
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl5/ch-1.pl
@@ -0,0 +1,15 @@
+use strict;
+use warnings;
+use feature 'say';
+
+my @input = @ARGV > 0 ? @ARGV : (1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9);
+my $prev = my $start = shift @input;
+for my $num (@input) {
+    if ( $prev == $num - 1 ) {
+        $prev = $num;
+    } else {
+        print $prev == $start ? "$prev," : "$start-$prev,";
+        $start = $prev = $num;
+    }
+}
+say $prev == $start ? $prev : "$start-$prev";
diff --git a/challenge-006/laurent-rosenfeld/perl5/ch-1a.pl b/challenge-006/laurent-rosenfeld/perl5/ch-1a.pl
new file mode 100644
index 0000000000..cd1d9d66f1
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl5/ch-1a.pl
@@ -0,0 +1,16 @@
+use strict;
+use warnings;
+use feature 'say';
+
+my @input = @ARGV > 0 ? @ARGV : (1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9);
+my $prev = my $start = shift @input;
+for my $num (sort { $a <=> $b } @input) {
+    next if $num == $prev;
+    if ( $prev == $num - 1 ) {
+        $prev = $num;
+    } else {
+        print $prev == $start ? "$prev," : "$start-$prev,";
+        $start = $prev = $num;
+    }
+}
+say $prev == $start ? $prev : "$start-$prev";
diff --git a/challenge-006/laurent-rosenfeld/perl5/ch-1b.pl b/challenge-006/laurent-rosenfeld/perl5/ch-1b.pl
new file mode 100644
index 0000000000..deb1b6cd3f
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl5/ch-1b.pl
@@ -0,0 +1,27 @@
+use strict;
+use warnings;
+use feature 'say';
+
+sub compare {
+    my ($prev, $start) = @_;
+    if ($prev > $start + 1) {
+        return "$start-$prev";
+    } elsif  ($prev > $start) {
+        return "$start,$prev";
+    } else {
+        return "$prev";
+    }
+}
+
+my @input = @ARGV > 0 ? @ARGV : (1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9);
+my $prev_val = my $start_val = shift @input;
+my $output = "";
+for my $num (@input) {
+    if ($num != $prev_val + 1) {
+        $output .= compare ($prev_val, $start_val) . ",";
+        $start_val = $num;
+    }
+    $prev_val = $num;
+}
+$output .= compare ($prev_val, $start_val);
+say $output;
diff --git a/challenge-006/laurent-rosenfeld/perl5/ch-1c.pl b/challenge-006/laurent-rosenfeld/perl5/ch-1c.pl
new file mode 100644
index 0000000000..9de0e3f3f0
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl5/ch-1c.pl
@@ -0,0 +1,23 @@
+use strict;
+use warnings;
+use feature 'say';
+
+sub compare {
+    my ($prev, $start) = @_;
+    return $prev > $start + 1 ? "$start-$prev"
+         : $prev > $start     ? "$start,$prev"
+         : "$prev";
+}
+
+my @input = @ARGV > 0 ? @ARGV : (1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9);
+my $prev_val = my $start_val = shift @input;
+my $output = "";
+for my $num (@input) {
+    if ($num != $prev_val + 1) {
+        $output .= compare ($prev_val, $start_val) . ",";
+        $start_val = $num;
+    }
+    $prev_val = $num;
+}
+$output .= compare ($prev_val, $start_val);
+say $output;
diff --git a/challenge-006/laurent-rosenfeld/perl5/ch-1d.pl b/challenge-006/laurent-rosenfeld/perl5/ch-1d.pl
new file mode 100644
index 0000000000..65368e5871
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl5/ch-1d.pl
@@ -0,0 +1,24 @@
+use strict;
+use warnings;
+use feature 'say';
+
+my @input = @ARGV > 0 ? @ARGV : (1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9);
+
+sub process_input {
+    my ($range, $input, $output) = @_;
+    my $curr_val = shift @$input;
+    if ($curr_val == $range->[1] + 1) {
+        $range->[1] = $curr_val;
+    } else {
+        my $sep = $range->[1] > $range->[0] + 1 ? "-" : ",";
+        $output .= (join $sep, @$range) . ",";
+        $range = [$curr_val, $curr_val];
+    }
+    return $output if @$input == 0;
+    process_input ($range, $input, $output);
+}
+
+my $first = shift @input;
+my $output = process_input([($first) x 2], \@input, "");
+chop $output;
+say $output;
diff --git a/challenge-006/laurent-rosenfeld/perl6/ch-1.p6 b/challenge-006/laurent-rosenfeld/perl6/ch-1.p6
new file mode 100644
index 0000000000..a57a0af39a
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl6/ch-1.p6
@@ -0,0 +1,20 @@
+use v6;
+sub compare (Int $prev, Int $start) {
+    return $prev > $start + 1 ?? "$start-$prev"
+        !! $prev > $start     ?? "$start,$prev"
+        !! "$prev";
+}
+
+my @input = @*ARGS.elems > 0 ?? @*ARGS !! 1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9;
+my $prev_val = my $start_val = shift @input;
+
+my $output = "";
+for @input -> $num {
+    if ($num != $prev_val + 1) {
+        $output ~= compare($prev_val, $start_val) ~ ",";
+        $start_val = $num;
+    }
+    $prev_val = $num;
+}
+$output ~= compare $prev_val, $start_val;
+say $output;
diff --git a/challenge-006/laurent-rosenfeld/perl6/ch-1a.p6 b/challenge-006/laurent-rosenfeld/perl6/ch-1a.p6
new file mode 100644
index 0000000000..98fa613908
--- /dev/null
+++ b/challenge-006/laurent-rosenfeld/perl6/ch-1a.p6
@@ -0,0 +1,15 @@
+use v6;
+my @input = @*ARGS.elems > 0 ?? @*ARGS !! 1,2,3,4,9,10,14,15,16,3,4,5,6,4,5,6,7,9,9;
+my $prev = my $start = shift @input;
+my @result = gather {
+    for @input -> $num {
+        if $num != $prev + 1 {
+            take $prev > $start + 1 ?? "$start-$prev"
+              !! $prev > $start     ?? "$start,$prev"
+              !! "$prev";
+            $start = $num;
+        }
+        $prev = $num;
+    }
+}
+say @result.append($prev).join(",");
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index e1555f8308..13549e7383 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,15 +1,90 @@
 {
+   "chart" : {
+      "type" : "column"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "tooltip" : {
+      "followPointer" : 1,
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "pointerFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 006"
+   },
+   "series" : [
+      {
+         "name" : "Champions",
+         "data" : [
+            {
+               "y" : 1,
+               "drilldown" : "Alicia Bielsa",
+               "name" : "Alicia Bielsa"
+            },
+            {
+               "drilldown" : "Andrezgz",
+               "y" : 2,
+               "name" : "Andrezgz"
+            },
+            {
+               "name" : "Athanasius",
+               "y" : 2,
+               "drilldown" : "Athanasius"
+            },
+            {
+               "drilldown" : "Gustavo Chaves",
+               "y" : 2,
+               "name" : "Gustavo Chaves"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Joelle Maslak",
+               "name" : "Joelle Maslak"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 2,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "drilldown" : "Maxim Kolodyazhny",
+               "y" : 1,
+               "name" : "Maxim Kolodyazhny"
+            },
+            {
+               "y" : 1,
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Tim Smith",
+               "name" : "Tim Smith"
+            }
+         ],
+         "colorByPoint" : 1
+      }
+   ],
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "legend" : {
+      "enabled" : 0
+   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Alicia Bielsa",
+            "name" : "Alicia Bielsa",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ],
-            "name" : "Alicia Bielsa",
-            "id" : "Alicia Bielsa"
+            ]
          },
          {
             "data" : [
@@ -22,24 +97,24 @@
             "id" : "Andrezgz"
          },
          {
-            "id" : "Athanasius",
             "name" : "Athanasius",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "Athanasius"
          },
          {
-            "id" : "Gustavo Chaves",
-            "name" : "Gustavo Chaves",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Gustavo Chaves",
+            "id" : "Gustavo Chaves"
          },
          {
             "data" : [
@@ -52,32 +127,46 @@
                   2
                ]
             ],
-            "id" : "Joelle Maslak",
-            "name" : "Joelle Maslak"
+            "name" : "Joelle Maslak",
+            "id" : "Joelle Maslak"
          },
          {
+            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl 5",
                   1
+               ],
+               [
+                  "Perl 6",
+                  1
                ]
             ],
+            "id" : "Laurent Rosenfeld"
+         },
+         {
             "id" : "Maxim Kolodyazhny",
-            "name" : "Maxim Kolodyazhny"
+            "name" : "Maxim Kolodyazhny",
+            "data" : [
+               [
+                  "Perl 5",
+                  1
+               ]
+            ]
          },
          {
+            "id" : "Simon Proctor",
             "data" : [
                [
                   "Perl 6",
                   1
                ]
             ],
-            "id" : "Simon Proctor",
             "name" : "Simon Proctor"
          },
          {
-            "name" : "Tim Smith",
             "id" : "Tim Smith",
+            "name" : "Tim Smith",
             "data" : [
                [
                   "Perl 6",
@@ -87,78 +176,8 @@
          }
       ]
    },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "series" : [
-      {
-         "data" : [
-            {
-               "y" : 1,
-               "name" : "Alicia Bielsa",
-               "drilldown" : "Alicia Bielsa"
-            },
-            {
-               "y" : 2,
-               "name" : "Andrezgz",
-               "drilldown" : "Andrezgz"
-            },
-            {
-               "y" : 2,
-               "name" : "Athanasius",
-               "drilldown" : "Athanasius"
-            },
-            {
-               "name" : "Gustavo Chaves",
-               "y" : 2,
-               "drilldown" : "Gustavo Chaves"
-            },
-            {
-               "drilldown" : "Joelle Maslak",
-               "name" : "Joelle Maslak",
-               "y" : 4
-            },
-            {
-               "name" : "Maxim Kolodyazhny",
-               "y" : 1,
-               "drilldown" : "Maxim Kolodyazhny"
-            },
-            {
-               "name" : "Simon Proctor",
-               "y" : 1,
-               "drilldown" : "Simon Proctor"
-            },
-            {
-               "name" : "Tim Smith",
-               "y" : 2,
-               "drilldown" : "Tim Smith"
-            }
-         ],
-         "colorByPoint" : 1,
-         "name" : "Champions"
-      }
-   ],
-   "legend" : {
-      "enabled" : 0
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 006"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "tooltip" : {
-      "pointerFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "followPointer" : 1,
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
-   },
    "subtitle" : {
-      "text" : "[Champions: 8] Last updated at 2019-05-02 09:52:35 GMT"
-   },
-   "chart" : {
-      "type" : "column"
+      "text" : "[Champions: 9] Last updated at 2019-05-02 13:28:30 GMT"
    },
    "plotOptions" : {
       "series" : {
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 42bb23798e..03dd071924 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,30 +1,21 @@
 {
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         }
-      }
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "xAxis" : {
+      "type" : "category"
    },
    "series" : [
       {
+         "name" : "Perl Weekly Challenge Languages",
+         "colorByPoint" : "true",
          "data" : [
             {
-               "y" : 113,
                "drilldown" : "001",
-               "name" : "#001 [P5=76 P6=37]"
+               "name" : "#001 [P5=76 P6=37]",
+               "y" : 113
             },
             {
                "name" : "#002 [P5=63 P6=32]",
-               "y" : 95,
-               "drilldown" : "002"
+               "drilldown" : "002",
+               "y" : 95
             },
             {
                "name" : "#003 [P5=32 P6=26]",
@@ -38,33 +29,39 @@
             },
             {
                "name" : "#005 [P5=31 P6=22]",
-               "y" : 53,
-               "drilldown" : "005"
+               "drilldown" : "005",
+               "y" : 53
             },
             {
-               "name" : "#006 [P5=10 P6=5]",
-               "y" : 15,
-               "drilldown" : "006"
+               "y" : 17,
+               "drilldown" : "006",
+               "name" : "#006 [P5=11 P6=6]"
             }
-         ],
-         "colorByPoint" : "true",
-         "name" : "Perl Weekly Challenge Languages"
+         ]
       }
    ],
-   "xAxis" : {
-      "type" : "category"
-   },
    "chart" : {
       "type" : "column"
    },
+   "legend" : {
+      "enabled" : "false"
+   },
    "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2019-05-02 09:52:46 GMT"
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2019-05-02 13:28:44 GMT"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Language"
    },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
             "name" : "001",
+            "id" : "001",
             "data" : [
                [
                   "Perl 5",
@@ -77,6 +74,8 @@
             ]
          },
          {
+            "name" : "002",
+            "id" : "002",
             "data" : [
                [
                   "Perl 5",
@@ -86,9 +85,7 @@
                   "Perl 6",
                   32
                ]
-            ],
-            "name" : "002",
-            "id" : "002"
+            ]
          },
          {
             "name" : "003",
@@ -105,7 +102,6 @@
             ]
          },
          {
-            "name" : "004",
             "id" : "004",
             "data" : [
                [
@@ -116,10 +112,10 @@
                   "Perl 6",
                   29
                ]
-            ]
+            ],
+            "name" : "004"
          },
          {
-            "id" : "005",
             "name" : "005",
             "data" : [
                [
@@ -130,33 +126,37 @@
                   "Perl 6",
                   22
                ]
-            ]
+            ],
+            "id" : "005"
          },
          {
             "data" : [
                [
                   "Perl 5",
-                  10
+                  11
                ],
                [
                   "Perl 6",
-                  5
+                  6
                ]
             ],
-            "name" : "006",
-            "id" : "006"
+            "id" : "006",
+            "name" : "006"
          }
       ]
    },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
+   },
    "tooltip" : {
       "followPointer" : "true",
       "pointFormat" : "<span style=\"color:{point.color}\">{point.name}</span>: <b>{point.y:f}</b><br/>",
       "headerFormat" : "<span style=\"font-size:11px\"></span>"
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
    }
 }
diff --git a/stats/pwc-leaders.json b/stats/pwc-leaders.json
index cdb0976a6e..91cb819951 100644
--- a/stats/pwc-leaders.json
+++ b/stats/pwc-leaders.json
@@ -1,107 +1,370 @@
 {
+   "series" : [
+      {
+         "data" : [
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "#1: Laurent Rosenfeld",
+               "y" : 54
+            },
+            {
+               "y" : 50,
+               "name" : "#2: Joelle Maslak",
+               "drilldown" : "Joelle Maslak"
+            },
+            {
+               "y" : 40,
+               "drilldown" : "Jaldhar H. Vyas",
+               "name" : "#3: Jaldhar H. Vyas"
+            },
+            {
+               "y" : 38,
+               "drilldown" : "Simon Proctor",
+               "name" : "#4: Simon Proctor"
+            },
+            {
+               "name" : "#5: Dr James A. Smith",
+               "drilldown" : "Dr James A. Smith",
+               "y" : 36
+            },
+            {
+               "y" : 36,
+               "name" : "#6: Jo Christian Oterhals",
+               "drilldown" : "Jo Christian Oterhals"
+            },
+            {
+               "name" : "#7: Nick Logan",
+               "drilldown" : "Nick Logan",
+               "y" : 32
+            },
+            {
+               "name" : "#8: Ruben Westerberg",
+               "drilldown" : "Ruben Westerberg",
+               "y" : 32
+            },
+            {
+               "name" : "#9: Adam Russell",
+               "drilldown" : "Adam Russell",
+               "y" : 30
+            },
+            {
+               "y" : 28,
+               "name" : "#10: Lars Balker",
+               "drilldown" : "Lars Balker"
+            },
+            {
+               "y" : 26,
+               "drilldown" : "Gustavo Chaves",
+               "name" : "#11: Gustavo Chaves"
+            },
+            {
+               "y" : 26,
+               "name" : "#12: Mark Senn",
+               "drilldown" : "Mark Senn"
+            },
+            {
+               "y" : 24,
+               "name" : "#13: Andrezgz",
+               "drilldown" : "Andrezgz"
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "name" : "#14: Arne Sommer",
+               "y" : 24
+            },
+            {
+               "y" : 24,
+               "drilldown" : "Athanasius",
+               "name" : "#15: Athanasius"
+            },
+            {
+               "name" : "#16: Kian-Meng Ang",
+               "drilldown" : "Kian-Meng Ang",
+               "y" : 24
+            },
+            {
+               "name" : "#17: Doug Schrag",
+               "drilldown" : "Doug Schrag",
+               "y" : 20
+            },
+            {
+               "drilldown" : "Francis Whittle",
+               "name" : "#18: Francis Whittle",
+               "y" : 18
+            },
+            {
+               "drilldown" : "Duncan C. White",
+               "name" : "#19: Duncan C. White",
+               "y" : 16
+            },
+            {
+               "y" : 16,
+               "drilldown" : "Robert Gratza",
+               "name" : "#20: Robert Gratza"
+            },
+            {
+               "name" : "#21: John Barrett",
+               "drilldown" : "John Barrett",
+               "y" : 14
+            },
+            {
+               "y" : 12,
+               "drilldown" : "Daniel Mantovani",
+               "name" : "#22: Daniel Mantovani"
+            },
+            {
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