- Added solution by Peter Campbell Smith.

14 files changed, 1626 insertions, 1571 deletions

diff --git a/challenge-129/peter-campbell-smith/perl/ch-2.pl b/challenge-129/peter-campbell-smith/perl/ch-2.pl
new file mode 100755
index 0000000000..6b6837eec9
--- /dev/null
+++ b/challenge-129/peter-campbell-smith/perl/ch-2.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/perl
+
+# Peter Campbell Smith - 2021-09-06
+# Perl weekly challenge 129 task #2
+
+# You are given two linked list having single digit positive numbers.
+
+# Write a script to add the two linked list and create a new linked 
+# representing the sum of the two linked list numbers. The two linked 
+# lists may or may not have the same number of elements.
+
+use strict;
+use warnings;
+
+my ($L1, $L1_left, $L2, $L2_left, $L3, $one, $two, $carry, $sum, $units, $blanks1, $blanks2);
+
+# given lists
+$L1 = $L1_left =      '9 -> 2 -> 0 -> 0 -> 5 -> 0 -> 7 -> 0';
+$L2 = $L2_left = '7 -> 9 -> 9 -> 0 -> 8 -> 3 -> 9 -> 7 -> 0';
+
+# cycle back from the end of each list
+$carry = 0;
+$L3 = '';
+while ($L1_left =~ m|\d| or $L2_left =~ m|\d| or $carry) {   # not finished yet
+	$one = $two = 0;
+	($L1_left, $one) = ($1, $2) if $L1_left =~ m|(.*)(\d)|;  # strip off last (remaining) digit of each list
+	($L2_left, $two) = ($1, $2) if $L2_left =~ m|(.*)(\d)|;
+	$sum = $one + $two + $carry;                      # add the two digits and any carryover
+	$units = $sum % 10;                               # get new digit     
+	$L3 = "$units -> $L3";							  # add it to the start of L3
+	$carry = ($sum - $units) / 10;                    # and compute any carryover (can only be 0 or 1)
+}
+
+# line them up
+$L3 =~ s|....$||;     # remove final ' -> '
+$blanks1 = length($L3) - length($L1);
+$blanks2 = length($L3) - length($L2);
+print 'L1 = ' . (' ' x $blanks1) . $L1 . "\n" .
+	  'L2 = ' . (' ' x $blanks2) . $L2 . "\n" .
+	  "L3 = $L3\n";
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index c202914ea0..88d145d836 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,19 +1,71 @@
 {
+   "subtitle" : {
+      "text" : "[Champions: 5] Last updated at 2021-09-07 02:33:52 GMT"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 129"
+   },
    "plotOptions" : {
       "series" : {
          "borderWidth" : 0,
          "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
+            "format" : "{point.y}",
+            "enabled" : 1
          }
       }
    },
-   "title" : {
-      "text" : "The Weekly Challenge - 129"
+   "legend" : {
+      "enabled" : 0
    },
-   "subtitle" : {
-      "text" : "[Champions: 4] Last updated at 2021-09-07 02:21:59 GMT"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "tooltip" : {
+      "pointFormat" : "<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/>"
    },
+   "series" : [
+      {
+         "data" : [
+            {
+               "drilldown" : "Abigail",
+               "name" : "Abigail",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari"
+            },
+            {
+               "name" : "Peter Campbell Smith",
+               "drilldown" : "Peter Campbell Smith",
+               "y" : 1
+            },
+            {
+               "name" : "Roger Bell_West",
+               "drilldown" : "Roger Bell_West",
+               "y" : 3
+            }
+         ],
+         "colorByPoint" : 1,
+         "name" : "The Weekly Challenge - 129"
+      }
+   ],
    "drilldown" : {
       "series" : [
          {
@@ -28,6 +80,7 @@
          },
          {
             "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -37,11 +90,9 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Dave Jacoby"
+            ]
          },
          {
-            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -52,10 +103,20 @@
                   2
                ]
             ],
-            "id" : "Luca Ferrari"
+            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari"
+         },
+         {
+            "name" : "Peter Campbell Smith",
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ]
+            ],
+            "id" : "Peter Campbell Smith"
          },
          {
-            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -66,55 +127,9 @@
                   1
                ]
             ],
-            "id" : "Roger Bell_West"
+            "id" : "Roger Bell_West",
+            "name" : "Roger Bell_West"
          }
       ]
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "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
-   },
-   "series" : [
-      {
-         "name" : "The Weekly Challenge - 129",
-         "data" : [
-            {
-               "name" : "Abigail",
-               "y" : 2,
-               "drilldown" : "Abigail"
-            },
-            {
-               "drilldown" : "Dave Jacoby",
-               "y" : 3,
-               "name" : "Dave Jacoby"
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Luca Ferrari",
-               "name" : "Luca Ferrari"
-            },
-            {
-               "name" : "Roger Bell_West",
-               "drilldown" : "Roger Bell_West",
-               "y" : 3
-            }
-         ],
-         "colorByPoint" : 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 88d7b3b4a3..10a09a0724 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,41 +1,36 @@
 {
    "xAxis" : {
+      "type" : "category",
       "labels" : {
          "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
          }
+      }
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : null
       },
-      "type" : "category"
+      "min" : 0
    },
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
    },
-   "chart" : {
-      "type" : "column"
-   },
-   "title" : {
-      "text" : "The Weekly Challenge Contributions [2019 - 2021]"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2021-09-07 02:21:58 GMT"
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
    "series" : [
       {
+         "name" : "Contributions",
          "dataLabels" : {
+            "y" : 10,
+            "enabled" : "true",
             "format" : "{point.y:.0f}",
             "rotation" : -90,
-            "color" : "#FFFFFF",
             "style" : {
                "fontSize" : "13px",
                "fontFamily" : "Verdana, sans-serif"
             },
-            "align" : "right",
-            "enabled" : "true",
-            "y" : 10
+            "color" : "#FFFFFF",
+            "align" : "right"
          },
          "data" : [
             [
@@ -44,20 +39,25 @@
             ],
             [
                "Perl",
-               6151
+               6152
             ],
             [
                "Raku",
                3796
             ]
-         ],
-         "name" : "Contributions"
+         ]
       }
    ],
-   "yAxis" : {
-      "min" : 0,
-      "title" : {
-         "text" : null
-      }
+   "chart" : {
+      "type" : "column"
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2021-09-07 02:33:52 GMT"
+   },
+   "title" : {
+      "text" : "The Weekly Challenge Contributions [2019 - 2021]"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 9f0b19938b..1a7a992253 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,684 +1,16 @@
 {
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "series" : [
-      {
-         "colorByPoint" : "true",
-         "name" : "The Weekly Challenge Languages",
-         "data" : [
-            {
-               "name" : "#001",
-               "drilldown" : "001",
-               "y" : 161
-            },
-            {
-               "y" : 125,
-               "drilldown" : "002",
-               "name" : "#002"
-            },
-            {
-               "name" : "#003",
-               "y" : 81,
-               "drilldown" : "003"
-            },
-            {
-               "drilldown" : "004",
-               "y" : 99,
-               "name" : "#004"
-            },
-            {
-               "name" : "#005",
-               "y" : 78,
-               "drilldown" : "005"
-            },
-            {
-               "name" : "#006",
-               "drilldown" : "006",
-               "y" : 58
-            },
-            {
-               "name" : "#007",
-               "drilldown" : "007",
-               "y" : 64
-            },
-            {
-               "name" : "#008",
-               "drilldown" : "008",
-               "y" : 78
-            },
-            {
-               "name" : "#009",
-               "drilldown" : "009",
-               "y" : 76
-            },
-            {
-               "name" : "#010",
-               "drilldown" : "010",
-               "y" : 65
-            },
-            {
-               "name" : "#011",
-               "y" : 85,
-               "drilldown" : "011"
-            },
-            {
-               "name" : "#012",
-               "drilldown" : "012",
-               "y" : 89
-            },
-            {
-               "name" : "#013",
-               "drilldown" : "013",
-               "y" : 85
-            },
-            {
-               "y" : 101,
-               "drilldown" : "014",
-               "name" : "#014"
-            },
-            {
-               "name" : "#015",
-               "drilldown" : "015",
-               "y" : 99
-            },
-            {
-               "name" : "#016",
-               "drilldown" : "016",
-               "y" : 71
-            },
-            {
-               "name" : "#017",
-               "drilldown" : "017",
-               "y" : 84
-            },
-            {
-               "drilldown" : "018",
-               "y" : 81,
-               "name" : "#018"
-            },
-            {
-               "name" : "#019",
-               "y" : 103,
-               "drilldown" : "019"
-            },
-            {
-               "name" : "#020",
-               "y" : 101,
-               "drilldown" : "020"
-            },
-            {
-               "y" : 72,
-               "drilldown" : "021",
-               "name" : "#021"
-            },
-            {
-               "name" : "#022",
-               "y" : 68,
-               "drilldown" : "022"
-            },
-            {
-               "drilldown" : "023",
-               "y" : 97,
-               "name" : "#023"
-            },
-            {
-               "name" : "#024",
-               "drilldown" : "024",
-               "y" : 75
-            },
-            {
-               "name" : "#025",
-               "y" : 59,
-               "drilldown" : "025"
-            },
-            {
-               "name" : "#026",
-               "drilldown" : "026",
-               "y" : 74
-            },
-            {
-               "name" : "#027",
-               "drilldown" : "027",
-               "y" : 60
-            },
-            {
-               "drilldown" : "028",
-               "y" : 80,
-               "name" : "#028"
-            },
-            {
-               "drilldown" : "029",
-               "y" : 79,
-               "name" : "#029"
-            },
-            {
-               "name" : "#030",
-               "drilldown" : "030",
-               "y" : 117
-            },
-            {
-               "drilldown" : "031",
-               "y" : 89,
-               "name" : "#031"
-            },
-            {
-               "drilldown" : "032",
-               "y" : 94,
-               "name" : "#032"
-            },
-            {
-               "y" : 110,
-               "drilldown" : "033",
-               "name" : "#033"
-            },
-            {
-               "name" : "#034",
-               "drilldown" : "034",
-               "y" : 64
-            },
-            {
-               "name" : "#035",
-               "y" : 64,
-               "drilldown" : "035"
-            },
-            {
-               "y" : 68,
-               "drilldown" : "036",
-               "name" : "#036"
-            },
-            {
-               "drilldown" : "037",
-               "y" : 67,
-               "name" : "#037"
-            },
-            {
-               "name" : "#038",
-               "drilldown" : "038",
-               "y" : 68
-            },
-            {
-               "name" : "#039",
-               "y" : 62,
-               "drilldown" : "039"
-            },
-            {
-               "name" : "#040",
-               "drilldown" : "040",
-               "y" : 73
-            },
-            {
-               "name" : "#041",
-               "drilldown" : "041",
-               "y" : 76
-            },
-            {
-               "name" : "#042",
-               "y" : 92,
-               "drilldown" : "042"
-            },
-            {
-               "name" : "#043",
-               "y" : 68,
-               "drilldown" : "043"
-            },
-            {
-               "drilldown" : "044",
-               "y" : 85,
-               "name" : "#044"
-            },
-            {
-               "name" : "#045",
-               "y" : 96,
-               "drilldown" : "045"
-            },
-            {
-               "name" : "#046",
-               "drilldown" : "046",
-               "y" : 87
-            },
-            {
-               "y" : 84,
-               "drilldown" : "047",
-               "name" : "#047"
-            },
-            {
-               "name" : "#048",
-               "drilldown" : "048",
-               "y" : 108
-            },
-            {
-               "drilldown" : "049",
-               "y" : 89,
-               "name" : "#049"
-            },
-            {
-               "name" : "#050",
-               "drilldown" : "050",
-               "y" : 98
-            },
-            {
-               "drilldown" : "051",
-               "y" : 89,
-               "name" : "#051"
-            },
-            {
-               "drilldown" : "052",
-               "y" : 91,
-               "name" : "#052"
-            },
-            {
-               "y" : 101,
-               "drilldown" : "053",
-               "name" : "#053"
-            },
-            {
-               "drilldown" : "054",
-               "y" : 103,
-               "name" : "#054"
-            },
-            {
-               "y" : 88,
-               "drilldown" : "055",
-               "name" : "#055"
-            },
-            {
-               "drilldown" : "056",
-               "y" : 95,
-               "name" : "#056"
-            },
-            {
-               "name" : "#057",
-               "drilldown" : "057",
-               "y" : 80
-            },
-            {
-               "drilldown" : "058",
-               "y" : 69,
-               "name" : "#058"
-            },
-            {
-               "name" : "#059",
-               "drilldown" : "059",
-               "y" : 89
-            },
-            {
-               "name" : "#060",
-               "drilldown" : "060",
-               "y" : 85
-            },
-            {
-               "name" : "#061",
-               "drilldown" : "061",
-               "y" : 81
-            },
-            {
-               "drilldown" : "062",
-               "y" : 58,
-               "name" : "#062"
-            },
-            {
-               "name" : "#063",
-               "drilldown" : "063",
-               "y" : 89
-            },
-            {
-               "name" : "#064",
-               "drilldown" : "064",
-               "y" : 80
-            },
-            {
-               "drilldown" : "065",
-               "y" : 73,
-               "name" : "#065"
-            },
-            {
-               "y" : 84,
-               "drilldown" : "066",
-               "name" : "#066"
-            },
-            {
-               "drilldown" : "067",
-               "y" : 90,
-               "name" : "#067"
-            },
-            {
-               "y" : 75,
-               "drilldown" : "068",
-               "name" : "#068"
-            },
-            {
-               "name" : "#069",
-               "drilldown" : "069",
-               "y" : 83
-            },
-            {
-               "name" : "#070",
-               "y" : 93,
-               "drilldown" : "070"
-            },
-            {
-               "name" : "#071",
-               "drilldown" : "071",
-               "y" : 78
-            },
-            {
-               "drilldown" : "072",
-               "y" : 112,
-               "name" : "#072"
-            },
-            {
-               "name" : "#073",
-               "drilldown" : "073",
-               "y" : 110
-            },
-            {
-               "y" : 115,
-               "drilldown" : "074",
-               "name" : "#074"
-            },
-            {
-               "drilldown" : "075",
-               "y" : 115,
-               "name" : "#075"
-            },
-            {
-               "drilldown" : "076",
-               "y" : 99,
-               "name" : "#076"
-            },
-            {
-               "y" : 98,
-               "drilldown" : "077",
-               "name" : "#077"
-            },
-            {
-               "drilldown" : "078",
-               "y" : 127,
-               "name" : "#078"
-            },
-            {
-               "name" : "#079",
-               "drilldown" : "079",
-               "y" : 122
-            },
-            {
-               "y" : 127,
-               "drilldown" : "080",
-               "name" : "#080"
-            },
-            {
-               "name" : "#081",
-               "drilldown" : "081",
-               "y" : 114
-            },
-            {
-               "y" : 114,
-               "drilldown" : "082",
-               "name" : "#082"
-            },
-            {
-               "drilldown" : "083",
-               "y" : 127,
-               "name" : "#083"
-            },
-            {
-               "drilldown" : "084",
-               "y" : 119,
-               "name" : "#084"
-            },
-            {
-               "drilldown" : "085",
-               "y" : 114,
-               "name" : "#085"
-            },
-            {
-               "drilldown" : "086",
-               "y" : 104,
-               "name" : "#086"
-            },
-            {
-               "name" : "#087",
-               "y" : 101,
-               "drilldown" : "087"
-            },
-            {
-               "y" : 121,
-               "drilldown" : "088",
-               "name" : "#088"
-            },
-            {
-               "drilldown" : "089",
-               "y" : 113,
-               "name" : "#089"
-            },
-            {
-               "drilldown" : "090",
-               "y" : 113,
-               "name" : "#090"
-            },
-            {
-               "name" : "#091",
-               "drilldown" : "091",
-               "y" : 108
-            },
-            {
-               "y" : 98,
-               "drilldown" : "092",
-               "name" : "#092"
-            },
-            {
-               "name" : "#093",
-               "y" : 87,
-               "drilldown" : "093"
-            },
-            {
-               "y" : 87,
-               "drilldown" : "094",
-               "name" : "#094"
-            },
-            {
-               "name" : "#095",
-               "y" : 108,
-               "drilldown" : "095"
-            },
-            {
-               "name" : "#096",
-               "drilldown" : "096",
-               "y" : 108
-            },
-            {
-               "drilldown" : "097",
-               "y" : 111,
-               "name" : "#097"
-            },
-            {
-               "name" : "#098",
-               "drilldown" : "098",
-               "y" : 108
-            },
-            {
-               "drilldown" : "099",
-               "y" : 97,
-               "name" : "#099"
-            },
-            {
-               "name" : "#100",
-               "drilldown" : "100",
-               "y" : 120
-            },
-            {
-               "name" : "#101",
-               "drilldown" : "101",
-               "y" : 83
-            },
-            {
-               "name" : "#102",
-               "drilldown" : "102",
-               "y" : 90
-            },
-            {
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-         "borderWidth" : 0
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+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2021-09-07 02:33:52 GMT"
    },
    "title" : {
       "text" : "The Weekly Challenge Language"
    },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2021-09-07 02:21:59 GMT"
+   "legend" : {
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             "data" : [
                [
@@ -693,10 +25,11 @@
                   "Blog",
                   11
                ]
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+            ],
+            "name" : "001"
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             "data" : [
                [
                   "Perl",
@@ -711,10 +44,9 @@
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                ]
             ],
-            "id" : "002"
+            "name" : "002"
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                   "Perl",
@@ -729,10 +61,10 @@
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@@ -747,10 +79,12 @@
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@@ -764,11 +98,9 @@
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@@ -783,10 +115,11 @@
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@@ -801,11 +134,9 @@
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