- Added solutions by Laurent Rosenfeld.

18 files changed, 1527 insertions, 1430 deletions

diff --git a/challenge-099/laurent-rosenfeld/blog.txt b/challenge-099/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..061b21b81d
--- /dev/null
+++ b/challenge-099/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+http://blogs.perl.org/users/laurent_r/2021/02/perl-weekly-challenge-99-pattern-match-and-unique-subsequence.html
diff --git a/challenge-099/laurent-rosenfeld/perl/ch-1.pl b/challenge-099/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..dbd4ff781b
--- /dev/null
+++ b/challenge-099/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,17 @@
+use strict;
+use warnings;
+use feature "say";
+
+my $input = "abcde";
+my @test_patterns = qw/a*e a*d ?b*d a*c?e/;
+for my $pat (@test_patterns) {
+    say "$pat: ", match($input, $pat)
+}
+
+sub match {
+    my ($in, $pattern) = @_;
+    $pattern =~ s/\*/.*/g;
+    $pattern =~ s/\?/./g;
+    $pattern = "^$pattern\$";
+    return $in =~ /$pattern/ ? 1 : 0;
+}
diff --git a/challenge-099/laurent-rosenfeld/perl/ch-2.pl b/challenge-099/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..3f446f1853
--- /dev/null
+++ b/challenge-099/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,23 @@
+use strict;
+use warnings;
+use feature "say";
+
+my @input_tests = ( [ "littleit", "lit"], ["london", "lon"], ["aaaa", "aa"]);
+my $count;
+for my $in (@input_tests) {
+    $count = 0;
+    search_substr (@$in);
+    say "@$in: $count";
+}
+sub search_substr {
+    my ($in, $searched) = @_;
+    my $start = substr $searched, 0, 1;
+    my $index = 0;
+    while (1) {
+        $index = index $in, $start, $index;
+        return if $index < 0;
+        $index++;
+        ++$count and next  if length $searched == 1;
+        search_substr (substr($in, $index), substr($searched, 1));
+    }
+}
diff --git a/challenge-099/laurent-rosenfeld/raku/ch-1.raku b/challenge-099/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..881b11b7ab
--- /dev/null
+++ b/challenge-099/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,21 @@
+use v6;
+
+my $in = "abcde";
+my @test-patterns = <a*e a*d ?b*d a*c?e>;
+for @test-patterns -> $test {
+    say "$test: ", match $test, $in;
+}
+
+sub match (Str $pattern, Str $in) {
+    my $regex =
+        join "", gather {
+            take '^';
+            for $pattern.comb {
+                when '*' { take '.*' }
+                when '?' { take '.'  }
+                default  { take $_   }
+            }
+            take '$';
+    }
+    return  $in ~~ /<$regex>/ ?? 1 !! 0;
+}
diff --git a/challenge-099/laurent-rosenfeld/raku/ch-2.raku b/challenge-099/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..a7b7ab274a
--- /dev/null
+++ b/challenge-099/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,12 @@
+use v6;
+
+my @input-tests = [ "littleit", "lit"], ["london", "lon"];
+
+for @input-tests -> $test {
+    my ($in, $substr) = $test[0..1];
+    say "$test: ", search-substr $in, $substr;
+}
+sub search-substr (Str $in, Str $substr) {
+    my @results = $in.comb.combinations($substr.\
+        chars)>>.join("").grep({$_ eq $substr}).elems;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index c368438d63..b2b9a91f1e 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -2,70 +2,72 @@
    "title" : {
       "text" : "Perl Weekly Challenge - 099"
    },
-   "legend" : {
-      "enabled" : 0
-   },
    "series" : [
       {
          "data" : [
             {
-               "name" : "Arne Sommer",
                "y" : 5,
+               "name" : "Arne Sommer",
                "drilldown" : "Arne Sommer"
             },
             {
-               "drilldown" : "Dave Jacoby",
                "y" : 3,
-               "name" : "Dave Jacoby"
+               "name" : "Dave Jacoby",
+               "drilldown" : "Dave Jacoby"
             },
             {
+               "name" : "E. Choroba",
                "drilldown" : "E. Choroba",
-               "y" : 2,
-               "name" : "E. Choroba"
+               "y" : 2
             },
             {
-               "drilldown" : "Flavio Poletti",
+               "y" : 4,
                "name" : "Flavio Poletti",
-               "y" : 4
+               "drilldown" : "Flavio Poletti"
             },
             {
                "name" : "Gustavo Chaves",
-               "y" : 2,
-               "drilldown" : "Gustavo Chaves"
+               "drilldown" : "Gustavo Chaves",
+               "y" : 2
             },
             {
-               "drilldown" : "James Smith",
                "y" : 3,
+               "drilldown" : "James Smith",
                "name" : "James Smith"
             },
             {
-               "drilldown" : "Jan Krnavek",
+               "y" : 2,
                "name" : "Jan Krnavek",
-               "y" : 2
+               "drilldown" : "Jan Krnavek"
             },
             {
-               "drilldown" : "Luca Ferrari",
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld",
+               "y" : 5
+            },
+            {
+               "y" : 4,
                "name" : "Luca Ferrari",
-               "y" : 4
+               "drilldown" : "Luca Ferrari"
             },
             {
-               "name" : "Mark Anderson",
                "y" : 2,
+               "name" : "Mark Anderson",
                "drilldown" : "Mark Anderson"
             },
             {
+               "y" : 2,
                "drilldown" : "Nuno Vieira",
-               "name" : "Nuno Vieira",
-               "y" : 2
+               "name" : "Nuno Vieira"
             },
             {
                "name" : "Paulo Custodio",
-               "y" : 2,
-               "drilldown" : "Paulo Custodio"
+               "drilldown" : "Paulo Custodio",
+               "y" : 2
             },
             {
-               "name" : "Pete Houston",
                "y" : 2,
+               "name" : "Pete Houston",
                "drilldown" : "Pete Houston"
             },
             {
@@ -79,13 +81,13 @@
                "y" : 3
             },
             {
+               "y" : 2,
                "drilldown" : "Simon Proctor",
-               "name" : "Simon Proctor",
-               "y" : 2
+               "name" : "Simon Proctor"
             },
             {
-               "drilldown" : "Stuart Little",
                "y" : 4,
+               "drilldown" : "Stuart Little",
                "name" : "Stuart Little"
             },
             {
@@ -99,13 +101,45 @@
                "drilldown" : "W. Luis Mochan"
             }
          ],
-         "colorByPoint" : 1,
-         "name" : "Perl Weekly Challenge - 099"
+         "name" : "Perl Weekly Challenge - 099",
+         "colorByPoint" : 1
       }
    ],
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 19] Last updated at 2021-02-13 00:17:14 GMT"
+   },
+   "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"
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Arne Sommer",
             "name" : "Arne Sommer",
             "data" : [
                [
@@ -120,8 +154,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Arne Sommer"
+            ]
          },
          {
             "data" : [
@@ -134,8 +167,8 @@
                   1
                ]
             ],
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby"
+            "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby"
          },
          {
             "id" : "E. Choroba",
@@ -148,6 +181,7 @@
             "name" : "E. Choroba"
          },
          {
+            "name" : "Flavio Poletti",
             "data" : [
                [
                   "Perl",
@@ -158,21 +192,19 @@
                   2
                ]
             ],
-            "id" : "Flavio Poletti",
-            "name" : "Flavio Poletti"
+            "id" : "Flavio Poletti"
          },
          {
-            "id" : "Gustavo Chaves",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Gustavo Chaves"
+            "name" : "Gustavo Chaves",
+            "id" : "Gustavo Chaves"
          },
          {
-            "id" : "James Smith",
             "data" : [
                [
                   "Perl",
@@ -183,16 +215,35 @@
                   1
                ]
             ],
-            "name" : "James Smith"
+            "name" : "James Smith",
+            "id" : "James Smith"
          },
          {
             "name" : "Jan Krnavek",
-            "id" : "Jan Krnavek",
             "data" : [
                [
                   "Raku",
                   2
                ]
+            ],
+            "id" : "Jan Krnavek"
+         },
+         {
+            "id" : "Laurent Rosenfeld",
+            "name" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
             ]
          },
          {
@@ -210,8 +261,8 @@
             "id" : "Luca Ferrari"
          },
          {
-            "name" : "Mark Anderson",
             "id" : "Mark Anderson",
+            "name" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
@@ -220,36 +271,37 @@
             ]
          },
          {
+            "name" : "Nuno Vieira",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Nuno Vieira",
-            "name" : "Nuno Vieira"
+            "id" : "Nuno Vieira"
          },
          {
-            "name" : "Paulo Custodio",
+            "id" : "Paulo Custodio",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Paulo Custodio"
+            "name" : "Paulo Custodio"
          },
          {
+            "name" : "Pete Houston",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Pete Houston",
-            "name" : "Pete Houston"
+            "id" : "Pete Houston"
          },
          {
+            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -264,10 +316,10 @@
                   1
                ]
             ],
-            "id" : "Roger Bell_West",
             "name" : "Roger Bell_West"
          },
          {
+            "name" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -278,20 +330,20 @@
                   1
                ]
             ],
-            "id" : "Simon Green",
-            "name" : "Simon Green"
+            "id" : "Simon Green"
          },
          {
-            "id" : "Simon Proctor",
+            "name" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Simon Proctor"
+            "id" : "Simon Proctor"
          },
          {
+            "id" : "Stuart Little",
             "data" : [
                [
                   "Perl",
@@ -302,21 +354,19 @@
                   2
                ]
             ],
-            "id" : "Stuart Little",
             "name" : "Stuart Little"
          },
          {
-            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Ulrich Rieke"
+            "name" : "Ulrich Rieke"
          },
          {
-            "name" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -327,36 +377,9 @@
                   1
                ]
             ],
+            "name" : "W. Luis Mochan",
             "id" : "W. Luis Mochan"
          }
       ]
-   },
-   "subtitle" : {
-      "text" : "[Champions: 18] Last updated at 2021-02-13 00:08:58 GMT"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         }
-      }
-   },
-   "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
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 1bef88606c..8f2544ddb6 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,63 +1,63 @@
 {
-   "subtitle" : {
-      "text" : "Last updated at 2021-02-13 00:08:58 GMT"
-   },
-   "legend" : {
-      "enabled" : "false"
+   "yAxis" : {
+      "title" : {
+         "text" : null
+      },
+      "min" : 0
    },
    "series" : [
       {
+         "dataLabels" : {
+            "rotation" : -90,
+            "color" : "#FFFFFF",
+            "format" : "{point.y:.0f}",
+            "align" : "right",
+            "style" : {
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
+            },
+            "y" : 10,
+            "enabled" : "true"
+         },
+         "name" : "Contributions",
          "data" : [
             [
                "Blog",
-               1326
+               1327
             ],
             [
                "Perl",
-               4616
+               4618
             ],
             [
                "Raku",
-               2982
+               2984
             ]
-         ],
-         "dataLabels" : {
-            "format" : "{point.y:.0f}",
-            "color" : "#FFFFFF",
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "rotation" : -90,
-            "align" : "right",
-            "y" : 10,
-            "enabled" : "true"
-         },
-         "name" : "Contributions"
+         ]
       }
    ],
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   "subtitle" : {
+      "text" : "Last updated at 2021-02-13 00:17:14 GMT"
+   },
+   "chart" : {
+      "type" : "column"
    },
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
    },
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
    "xAxis" : {
       "labels" : {
          "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
+            "fontFamily" : "Verdana, sans-serif",
+            "fontSize" : "13px"
          }
       },
       "type" : "category"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index ab16ec284f..d8e5e074a5 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,11 +1,13 @@
 {
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
+   "xAxis" : {
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : "false"
    },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -20,10 +22,10 @@
                   11
                ]
             ],
-            "name" : "001"
+            "name" : "001",
+            "id" : "001"
          },
          {
-            "id" : "002",
             "data" : [
                [
                   "Perl",
@@ -38,7 +40,8 @@
                   10
                ]
             ],
-            "name" : "002"
+            "name" : "002",
+            "id" : "002"
          },
          {
             "id" : "003",
@@ -59,7 +62,7 @@
             "name" : "003"
          },
          {
-            "id" : "004",
+            "name" : "004",
             "data" : [
                [
                   "Perl",
@@ -74,10 +77,11 @@
                   10
                ]
             ],
-            "name" : "004"
+            "id" : "004"
          },
          {
             "id" : "005",
+            "name" : "005",
             "data" : [
                [
                   "Perl",
@@ -91,10 +95,10 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "005"
+            ]
          },
          {
+            "id" : "006",
             "data" : [
                [
                   "Perl",
@@ -109,11 +113,9 @@
                   7
                ]
             ],
-            "id" : "006",
             "name" : "006"
          },
          {
-            "id" : "007",
             "data" : [
                [
                   "Perl",
@@ -128,11 +130,11 @@
                   10
                ]
             ],
-            "name" : "007"
+            "name" : "007",
+            "id" : "007"
          },
          {
             "name" : "008",
-            "id" : "008",
             "data" : [
                [
                   "Perl",
@@ -146,10 +148,10 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "008"
          },
          {
-            "name" : "009",
             "id" : "009",
             "data" : [
                [
@@ -164,10 +166,10 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "009"
          },
          {
-            "id" : "010",
             "data" : [
                [
                   "Perl",
@@ -182,9 +184,12 @@
                   11
                ]
             ],
-            "name" : "010"
+            "name" : "010",
+            "id" : "010"
          },
          {
+            "id" : "011",
+            "name" : "011",
             "data" : [
                [
                   "Perl",
@@ -198,12 +203,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "011",
-            "name" : "011"
+            ]
          },
          {
-            "id" : "012",
+            "name" : "012",
             "data" : [
                [
                   "Perl",
@@ -218,10 +221,9 @@
                   11
                ]
             ],
-            "name" : "012"
+            "id" : "012"
          },
          {
-            "name" : "013",
             "id" : "013",
             "data" : [
                [
@@ -236,11 +238,11 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "013"
          },
          {
             "name" : "014",
-            "id" : "014",
             "data" : [
                [
                   "Perl",
@@ -254,10 +256,12 @@
                   "Blog",
                   15
                ]
-            ]
+            ],
+            "id" : "014"
          },
          {
             "id" : "015",
+            "name" : "015",
             "data" : [
                [
                   "Perl",
@@ -271,11 +275,9 @@
                   "Blog",
                   15
                ]
-            ],
-            "name" : "015"
+            ]
          },
          {
-            "id" : "016",
             "data" : [
                [
                   "Perl",
@@ -290,7 +292,8 @@
                   12
                ]
             ],
-            "name" : "016"
+            "name" : "016",
+            "id" : "016"
          },
          {
             "id" : "017",
@@ -311,7 +314,7 @@
             "name" : "017"
          },
          {
-            "name" : "018",
+            "id" : "018",
             "data" : [
                [
                   "Perl",
@@ -326,9 +329,10 @@
                   14
                ]
             ],
-            "id" : "018"
+            "name" : "018"
          },
          {
+            "id" : "019",
             "name" : "019",
             "data" : [
                [
@@ -343,10 +347,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "019"
+            ]
          },
          {
+            "id" : "020",
             "data" : [
                [
                   "Perl",
@@ -361,7 +365,6 @@
                   13
                ]
             ],
-            "id" : "020",
             "name" : "020"
          },
          {
@@ -401,7 +404,6 @@
             "name" : "022"
          },
          {
-            "id" : "023",
             "data" : [
                [
                   "Perl",
@@ -416,10 +418,11 @@
                   12
                ]
             ],
-            "name" : "023"
+            "name" : "023",
+            "id" : "023"
          },
          {
-            "id" : "024",
+            "name" : "024",
             "data" : [
                [
                   "Perl",
@@ -434,11 +437,9 @@
                   11
                ]
             ],
-            "name" : "024"
+            "id" : "024"
          },
          {
-            "name" : "025",
-            "id" : "025",
             "data" : [
                [
                   "Perl",
@@ -452,7 +453,9 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "025",
+            "id" : "025"
          },
          {
             "id" : "026",
@@ -473,7 +476,7 @@
             "name" : "026"
          },
          {
-            "name" : "027",
+            "id" : "027",
             "data" : [
                [
                   "Perl",
@@ -488,7 +491,7 @@
                   9
                ]
             ],
-            "id" : "027"
+            "name" : "027"
          },
          {
             "name" : "028",
@@ -509,7 +512,6 @@
             "id" : "028"
          },
          {
-            "name" : "029",
             "id" : "029",
             "data" : [
                [
@@ -524,10 +526,12 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "029"
          },
          {
             "id" : "030",
+            "name" : "030",
             "data" : [
                [
                   "Perl",
@@ -541,12 +545,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "030"
+            ]
          },
          {
             "name" : "031",
-            "id" : "031",
             "data" : [
                [
                   "Perl",
@@ -560,10 +562,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "id" : "031"
          },
          {
-            "id" : "032",
+            "name" : "032",
             "data" : [
                [
                   "Perl",
@@ -578,10 +581,9 @@
                   10
                ]
             ],
-            "name" : "032"
+            "id" : "032"
          },
          {
-            "name" : "033",
             "id" : "033",
             "data" : [
                [
@@ -596,10 +598,10 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "033"
          },
          {
-            "name" : "034",
             "id" : "034",
             "data" : [
                [
@@ -614,11 +616,10 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "034"
          },
          {
-            "name" : "035",
-            "id" : "035",
             "data" : [
                [
                   "Perl",
@@ -632,10 +633,13 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "035",
+            "id" : "035"
          },
          {
             "id" : "036",
+            "name" : "036",
             "data" : [
                [
                   "Perl",
@@ -649,11 +653,11 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "036"
+            ]
          },
          {
             "id" : "037",
+            "name" : "037",
             "data" : [
                [
                   "Perl",
@@ -667,11 +671,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "037"
+            ]
          },
          {
-            "name" : "038",
+            "id" : "038",
             "data" : [
                [
                   "Perl",
@@ -686,10 +689,9 @@
                   12
                ]
             ],