- Added contributions by Laurent Rosenfeld.

20 files changed, 1379 insertions, 1307 deletions

diff --git a/challenge-153/laurent-rosenfeld/blog.txt b/challenge-153/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..b6c4b5e993
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+http://blogs.perl.org/users/laurent_r/2022/02/perl-weekly-challenge-153-left-factorials-and-factorions.html
diff --git a/challenge-153/laurent-rosenfeld/julia/ch-1.jl b/challenge-153/laurent-rosenfeld/julia/ch-1.jl
new file mode 100644
index 0000000000..631ebf5ae6
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/julia/ch-1.jl
@@ -0,0 +1,6 @@
+a = [1, 2] # Julia arrays start with index 1
+
+for n in 3:10
+    push!(a, n * a[n - 1] - (n - 1) * a[n - 2])
+end
+println(a)
diff --git a/challenge-153/laurent-rosenfeld/perl/ch-1.pl b/challenge-153/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..dad7d97ef5
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,9 @@
+use strict;
+use warnings;
+use feature "say";
+
+my @a = (0, 1);
+for my $n (2..10) {
+    $a[$n] = $n * $a[$n -1] - ($n - 1) * $a[$n - 2];
+}
+say "@a[1..10]";
diff --git a/challenge-153/laurent-rosenfeld/perl/ch-2.pl b/challenge-153/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..f9c6932b38
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,23 @@
+use strict;
+use warnings;
+use feature "say";
+
+sub fact {
+    my $i = shift;
+    my $prod = 1;
+    $prod *= $_ for 2..$i;
+    return $prod;
+}
+
+my @digit_fact = map {fact $_} 0..9;
+
+sub is_factorion {
+    my $in = shift;
+    my $sum = 0;
+    $sum += $_ for map { $digit_fact[$_] } split //, $in;
+    return $sum == $in;
+    #say $sum;
+}
+for (1..50000) {
+    say $_ if is_factorion($_)
+}
diff --git a/challenge-153/laurent-rosenfeld/raku/ch-1.raku b/challenge-153/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..0e6049ad42
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,5 @@
+my @a = 0, 1, 2;
+for 3..10 -> $n {
+    @a[$n] = $n * @a[$n -1] - ($n - 1) * @a[$n - 2];
+}
+say @a[1..10];
diff --git a/challenge-153/laurent-rosenfeld/raku/ch-2.raku b/challenge-153/laurent-rosenfeld/raku/ch-2.raku
new file mode 100644
index 0000000000..338f9f0f65
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/raku/ch-2.raku
@@ -0,0 +1,5 @@
+sub is_factorion (Int $in) {
+    my $sum = [+] map { [*] 1..$_ }, $in.comb;
+    return $sum == $in;
+}
+say $_ if is_factorion $_ for 1..50000;
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index fbb55a7467..f02179f78c 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,17 +1,21 @@
 {
+   "chart" : {
+      "type" : "column"
+   },
    "series" : [
       {
+         "colorByPoint" : 1,
          "name" : "The Weekly Challenge - 153",
          "data" : [
             {
+               "drilldown" : "Abigail",
                "name" : "Abigail",
-               "y" : 2,
-               "drilldown" : "Abigail"
+               "y" : 2
             },
             {
-               "drilldown" : "Dave Jacoby",
                "name" : "Dave Jacoby",
-               "y" : 3
+               "y" : 3,
+               "drilldown" : "Dave Jacoby"
             },
             {
                "y" : 2,
@@ -19,8 +23,13 @@
                "drilldown" : "E. Choroba"
             },
             {
-               "name" : "Luca Ferrari",
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld",
+               "y" : 5
+            },
+            {
                "y" : 4,
+               "name" : "Luca Ferrari",
                "drilldown" : "Luca Ferrari"
             },
             {
@@ -29,19 +38,19 @@
                "y" : 2
             },
             {
-               "name" : "Marton Polgar",
                "y" : 2,
+               "name" : "Marton Polgar",
                "drilldown" : "Marton Polgar"
             },
             {
-               "name" : "Matthew Neleigh",
                "y" : 2,
+               "name" : "Matthew Neleigh",
                "drilldown" : "Matthew Neleigh"
             },
             {
+               "drilldown" : "Olivier Delouya",
                "y" : 1,
-               "name" : "Olivier Delouya",
-               "drilldown" : "Olivier Delouya"
+               "name" : "Olivier Delouya"
             },
             {
                "drilldown" : "Peter Campbell Smith",
@@ -49,9 +58,9 @@
                "y" : 3
             },
             {
-               "name" : "PokGoPun",
+               "drilldown" : "PokGoPun",
                "y" : 2,
-               "drilldown" : "PokGoPun"
+               "name" : "PokGoPun"
             },
             {
                "drilldown" : "Robert DiCicco",
@@ -59,58 +68,23 @@
                "y" : 4
             },
             {
-               "drilldown" : "Roger Bell_West",
+               "y" : 4,
                "name" : "Roger Bell_West",
-               "y" : 4
+               "drilldown" : "Roger Bell_West"
             },
             {
-               "drilldown" : "Ulrich Rieke",
                "y" : 4,
-               "name" : "Ulrich Rieke"
+               "name" : "Ulrich Rieke",
+               "drilldown" : "Ulrich Rieke"
             },
             {
-               "drilldown" : "W. Luis Mochan",
                "y" : 3,
-               "name" : "W. Luis Mochan"
+               "name" : "W. Luis Mochan",
+               "drilldown" : "W. Luis Mochan"
             }
-         ],
-         "colorByPoint" : 1
+         ]
       }
    ],
-   "title" : {
-      "text" : "The Weekly Challenge - 153"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "tooltip" : {
-      "followPointer" : 1,
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
-   },
-   "legend" : {
-      "enabled" : 0
-   },
-   "subtitle" : {
-      "text" : "[Champions: 14] Last updated at 2022-02-23 08:06:33 GMT"
-   },
    "drilldown" : {
       "series" : [
          {
@@ -138,17 +112,35 @@
             "name" : "Dave Jacoby"
          },
          {
-            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "id" : "E. Choroba",
             "name" : "E. Choroba"
          },
          {
-            "id" : "Luca Ferrari",
+            "name" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "id" : "Laurent Rosenfeld"
+         },
+         {
+            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -159,7 +151,7 @@
                   2
                ]
             ],
-            "name" : "Luca Ferrari"
+            "id" : "Luca Ferrari"
          },
          {
             "name" : "Mark Anderson",
@@ -172,37 +164,36 @@
             "id" : "Mark Anderson"
          },
          {
+            "name" : "Marton Polgar",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Marton Polgar",
             "id" : "Marton Polgar"
          },
          {
-            "id" : "Matthew Neleigh",
             "name" : "Matthew Neleigh",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Matthew Neleigh"
          },
          {
-            "id" : "Olivier Delouya",
-            "name" : "Olivier Delouya",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "id" : "Olivier Delouya",
+            "name" : "Olivier Delouya"
          },
          {
-            "id" : "Peter Campbell Smith",
             "name" : "Peter Campbell Smith",
             "data" : [
                [
@@ -213,20 +204,20 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Peter Campbell Smith"
          },
          {
-            "id" : "PokGoPun",
+            "name" : "PokGoPun",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "PokGoPun"
+            "id" : "PokGoPun"
          },
          {
-            "name" : "Robert DiCicco",
             "data" : [
                [
                   "Perl",
@@ -237,10 +228,10 @@
                   2
                ]
             ],
-            "id" : "Robert DiCicco"
+            "id" : "Robert DiCicco",
+            "name" : "Robert DiCicco"
          },
          {
-            "id" : "Roger Bell_West",
             "name" : "Roger Bell_West",
             "data" : [
                [
@@ -251,10 +242,10 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Roger Bell_West"
          },
          {
-            "id" : "Ulrich Rieke",
             "name" : "Ulrich Rieke",
             "data" : [
                [
@@ -265,11 +256,12 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Ulrich Rieke"
          },
          {
-            "id" : "W. Luis Mochan",
             "name" : "W. Luis Mochan",
+            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -282,5 +274,36 @@
             ]
          }
       ]
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "subtitle" : {
+      "text" : "[Champions: 15] Last updated at 2022-02-23 08:24:39 GMT"
+   },
+   "tooltip" : {
+      "followPointer" : 1,
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 153"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 4889391264..c4a8976010 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,63 +1,63 @@
 {
-   "chart" : {
-      "type" : "column"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
    "yAxis" : {
+      "min" : 0,
       "title" : {
          "text" : null
-      },
-      "min" : 0
+      }
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2022-02-23 08:24:39 GMT"
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    },
    "xAxis" : {
-      "type" : "category",
       "labels" : {
          "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
          }
-      }
+      },
+      "type" : "category"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge Contributions [2019 - 2022]"
+   },
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
+         "name" : "Contributions",
          "data" : [
             [
                "Blog",
-               2291
+               2292
             ],
             [
                "Perl",
-               7347
+               7349
             ],
             [
                "Raku",
-               4414
+               4416
             ]
          ],
-         "name" : "Contributions",
          "dataLabels" : {
-            "align" : "right",
             "y" : 10,
-            "enabled" : "true",
-            "color" : "#FFFFFF",
             "style" : {
                "fontFamily" : "Verdana, sans-serif",
                "fontSize" : "13px"
             },
+            "align" : "right",
+            "enabled" : "true",
             "rotation" : -90,
-            "format" : "{point.y:.0f}"
+            "format" : "{point.y:.0f}",
+            "color" : "#FFFFFF"
          }
       }
-   ],
-   "title" : {
-      "text" : "The Weekly Challenge Contributions [2019 - 2022]"
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2022-02-23 08:06:33 GMT"
-   }
+   ]
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 206a006d7f..b3a449dd26 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,9 +1,40 @@
 {
+   "title" : {
+      "text" : "The Weekly Challenge Language"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "tooltip" : {
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "followPointer" : "true",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2022-02-23 08:24:39 GMT"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
             "name" : "001",
+            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -20,6 +51,7 @@
             ]
          },
          {
+            "name" : "002",
             "data" : [
                [
                   "Perl",
@@ -34,7 +66,6 @@
                   10
                ]
             ],
-            "name" : "002",
             "id" : "002"
          },
          {
@@ -56,7 +87,6 @@
             "name" : "003"
          },
          {
-            "id" : "004",
             "name" : "004",
             "data" : [
                [
@@ -71,11 +101,10 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "004"
          },
          {
-            "id" : "005",
-            "name" : "005",
             "data" : [
                [
                   "Perl",
@@ -89,10 +118,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "005",
+            "name" : "005"
          },
          {
-            "id" : "006",
             "data" : [
                [
                   "Perl",
@@ -107,11 +137,12 @@
                   7
                ]
             ],
+            "id" : "006",
             "name" : "006"
          },
          {
-            "id" : "007",
             "name" : "007",
+            "id" : "007",
             "data" : [
                [
                   "Perl",
@@ -128,6 +159,7 @@
             ]
          },
          {
+            "name" : "008",
             "data" : [
                [
                   "Perl",
@@ -142,11 +174,11 @@
                   12
                ]
             ],
-            "name" : "008",
             "id" : "008"
          },
          {
             "name" : "009",
+            "id" : "009",
             "data" : [
                [
                   "Perl",
@@ -160,10 +192,11 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "009"
+            ]
          },
          {
+            "name" : "010",
+            "id" : "010",
             "data" : [
                [
                   "Perl",
@@ -177,9 +210,7 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "010",
-            "id" : "010"
+            ]
          },
          {
             "id" : "011",
@@ -214,10 +245,12 @@
                   11
                ]
             ],
-            "name" : "012",
-            "id" : "012"
+            "id" : "012",
+            "name" : "012"
          },
          {
+            "name" : "013",
+            "id" : "013",
             "data" : [
                [
                   "Perl",
@@ -231,12 +264,9 @@
                   "Blog",
                   13
                ]
-            ],
-            "name" : "013",
-            "id" : "013"
+            ]
          },
          {
-            "id" : "014",
             "data" : [
                [
                   "Perl",
@@ -251,9 +281,11 @@
                   15
                ]
             ],
+            "id" : "014",
             "name" : "014"
          },
          {
+            "name" : "015",
             "data" : [
                [
                   "Perl",
@@ -268,10 +300,10 @@
                   15
                ]
             ],
-            "name" : "015",
             "id" : "015"
          },
          {
+            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -286,10 +318,11 @@
                   12
                ]
             ],
-            "name" : "016",
             "id" : "016"
          },
          {
+            "name" : "017",
+            "id" : "017",
             "data" : [
                [
                   "Perl",
@@ -303,12 +336,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "017",
-            "id" : "017"
+            ]
          },
          {
-            "id" : "018",
             "name" : "018",
             "data" : [
                [
@@ -323,7 +353,8 @@
                   "Blog",
                   14
                ]
-            ]
+            ],
+            "id" : "018"
          },
          {
             "id" : "019",
@@ -344,7 +375,6 @@
             "name" : "019"
          },
          {
-            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -359,9 +389,11 @@
                   13
                ]
             ],
-            "id" : "020"
+            "id" : "020",
+            "name" : "020"
          },
          {
+            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -376,11 +408,9 @@
                   10
                ]
             ],
-            "name" : "021",
-            "id" : "021"
+            "name" : "021"
          },
          {
-            "id" : "022",
             "data" : [
                [
                   "Perl",
@@ -395,9 +425,11 @@
                   10
                ]
             ],
+            "id" : "022",
             "name" : "022"
          },
          {
+            "id" : "023",
             "data" : [
                [
                   "Perl",
@@ -412,8 +444,7 @@
                   12
                ]
             ],
-            "name" : "023",
-            "id" : "023"
+            "name" : "023"
          },
          {
             "name" : "024",
@@ -448,11 +479,10 @@
                   12
                ]
             ],
-            "name" : "025",
-            "id" : "025"
+            "id" : "025",
+            "name" : "025"
          },
          {
-            "name" : "026",
             "data" : [
                [
                   "Perl",
@@ -467,9 +497,11 @@
                   10
                ]
             ],
-            "id" : "026"
+            "id" : "026",
+            "name" : "026"
          },
          {
+            "name" : "027",
             "data" : [
                [
                   "Perl",
@@ -484,11 +516,9 @@
                   9
                ]
             ],
-            "name" : "027",
             "id" : "027"
          },
          {
-            "name" : "028",
             "data" : [
                [
                   "Perl",
@@ -503,9 +533,11 @@
                   9
                ]
             ],
-            "id" : "028"
+            "id" : "028",
+            "name" : "028"
          },
          {
+            "name" : "029",
             "data" : [
                [
                   "Perl",
@@ -520,10 +552,10 @@
                   12
                ]
             ],
-            "name" : "029",
             "id" : "029"
          },
          {
+            "name" : "030",
             "id" : "030",
             "data" : [
                [
@@ -538,12 +570,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "030"
+            ]
          },
          {
             "id" : "031",
-            "name" : "031",
             "data" : [
                [
                   "Perl",
@@ -557,9 +587,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "031"
          },
          {
+            "name" : "032",
             "data" : [
                [
                   "Perl",
@@ -574,11 +606,11 @@
                   10
                ]
             ],
-            "name" : "032",
             "id" : "032"
          },
          {
             "name" : "033",
+            "id" : "033",
             "data" : [
                [
                   "Perl",
@@ -592,10 +624,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "033"
+            ]
          },
          {
+            "name" : "034",
             "data" : [
                [
                   "Perl",
@@ -610,12 +642,10 @@
                   11
                ]
             ],
-            "name" : "034",
             "id" : "034"
          },
          {
             "id" : "035",
-            "name" : "035",
             "data" : [
                [
                   "Perl",
@@ -629,10 +659,10 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "035"
          },
          {
-            "id" : "036",
             "data" : [
                [
                   "Perl",
@@ -647,10 +677,11 @@
                   11
                ]
             ],
+            "id" : "036",
             "name" : "036"
          },
          {
-            "name" : "037",
+            "id" : "037",
             "data" : [
                [
                   "Perl",
@@ -665,10 +696,9 @@
                   9
                ]
             ],
-            "id" : "037"
+            "name" : "037"
          },
          {
-            "id" : "038",
             "data" : [
                [
                   "Perl",
@@ -683,10 +713,12 @@
                   12
                ]
             ],
+            "id" : "038",
             "name" : "038"
          },
          {
             "name" : "039",
+            "id" : "039",
             "data" : [
                [
                   "Perl",
@@ -700,10 +732,10 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "039"
+            ]
          },
          {
+            "name" : "040",
             "id" : "040",
             "data" : [
                [
@@ -718,8 +750,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "040"
+            ]
          },
          {
             "name" : "041",
@@ -740,6 +771,8 @@
             "id" : "041"
          },
          {
+            "name" : "042",
+            "id" : "042",
             "data" : [
                [
                   "Perl",
@@ -753,12 +786,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "042",
-            "id" : "042"
+            ]
          },
          {
-            "id" : "043",
             "data" : [
                [
                   "Perl",
@@ -773,10 +803,12 @@
                   11
                ]
             ],
+            "id" : "043",
             "name" : "043"
          },
          {
             "name" : "044",
+            "id" : "044",
             "data" : [
                [
                   "Perl",
@@ -790,10 +822,10 @@