- Added APL solutions by Richard Park.

16 files changed, 1178 insertions, 1130 deletions

diff --git a/challenge-070/richard-park/apl/CharacterSwapping.aplf b/challenge-070/richard-park/apl/CharacterSwapping.aplf
new file mode 100644
index 0000000000..359f6a52c8
--- /dev/null
+++ b/challenge-070/richard-park/apl/CharacterSwapping.aplf
@@ -0,0 +1,10 @@
+ CharacterSwapping←{
+⍝ Swap elements of ⍺ from (1 to c) and (o+1 to o+c)
+     ⍺←'PerlWeeklyChallenge'
+     ⎕IO←0
+     n←≢⍺
+     (c o)←⍵
+     si←n|1+⍳c
+     ri←n|1+o+⍳c
+     s[ri]@si⊢s[si]@ri⊢⍺
+ }
diff --git a/challenge-070/richard-park/apl/GrayCodeSequence.aplf b/challenge-070/richard-park/apl/GrayCodeSequence.aplf
new file mode 100644
index 0000000000..54e9b87e0e
--- /dev/null
+++ b/challenge-070/richard-park/apl/GrayCodeSequence.aplf
@@ -0,0 +1,6 @@
+ GrayCodeSequence←{
+⍝ Generate ⍵-bit Gray Code Sequence
+⍝ ⍵ ≥ 2
+     ⍺←0 1 3 2
+     {2⊥(0∘⍪,1⍪⌽⍤⊢)2⊥⍣¯1⊢⍵}⍣(⍵-2)⊢⍺
+ }
diff --git a/challenge-070/richard-park/apl/ch-1.aplf b/challenge-070/richard-park/apl/ch-1.aplf
new file mode 100644
index 0000000000..359f6a52c8
--- /dev/null
+++ b/challenge-070/richard-park/apl/ch-1.aplf
@@ -0,0 +1,10 @@
+ CharacterSwapping←{
+⍝ Swap elements of ⍺ from (1 to c) and (o+1 to o+c)
+     ⍺←'PerlWeeklyChallenge'
+     ⎕IO←0
+     n←≢⍺
+     (c o)←⍵
+     si←n|1+⍳c
+     ri←n|1+o+⍳c
+     s[ri]@si⊢s[si]@ri⊢⍺
+ }
diff --git a/challenge-070/richard-park/apl/ch-2.aplf b/challenge-070/richard-park/apl/ch-2.aplf
new file mode 100644
index 0000000000..54e9b87e0e
--- /dev/null
+++ b/challenge-070/richard-park/apl/ch-2.aplf
@@ -0,0 +1,6 @@
+ GrayCodeSequence←{
+⍝ Generate ⍵-bit Gray Code Sequence
+⍝ ⍵ ≥ 2
+     ⍺←0 1 3 2
+     {2⊥(0∘⍪,1⍪⌽⍤⊢)2⊥⍣¯1⊢⍵}⍣(⍵-2)⊢⍺
+ }
diff --git a/challenge-070/richard-park/blog.txt b/challenge-070/richard-park/blog.txt
new file mode 100644
index 0000000000..63f45213fe
--- /dev/null
+++ b/challenge-070/richard-park/blog.txt
@@ -0,0 +1 @@
+https://www.youtube.com/watch?v=TNBQYxtVnx4
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 37de16db1f..46ad242e44 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,42 +1,41 @@
 {
    "subtitle" : {
-      "text" : "[Champions: 24] Last updated at 2020-07-26 21:04:13 GMT"
+      "text" : "[Champions: 25] Last updated at 2020-07-26 22:21:35 GMT"
    },
    "legend" : {
       "enabled" : 0
    },
-   "xAxis" : {
-      "type" : "category"
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
          "name" : "Perl Weekly Challenge - 070",
-         "colorByPoint" : 1,
          "data" : [
             {
-               "name" : "Andrew Shitov",
+               "y" : 4,
                "drilldown" : "Andrew Shitov",
-               "y" : 4
+               "name" : "Andrew Shitov"
             },
             {
                "name" : "Arne Sommer",
-               "drilldown" : "Arne Sommer",
-               "y" : 5
+               "y" : 5,
+               "drilldown" : "Arne Sommer"
             },
             {
                "y" : 4,
-               "name" : "Athanasius",
-               "drilldown" : "Athanasius"
+               "drilldown" : "Athanasius",
+               "name" : "Athanasius"
             },
             {
                "y" : 2,
-               "name" : "Cheok-Yin Fung",
-               "drilldown" : "Cheok-Yin Fung"
+               "drilldown" : "Cheok-Yin Fung",
+               "name" : "Cheok-Yin Fung"
             },
             {
+               "name" : "Csaba Simandi",
                "y" : 1,
-               "drilldown" : "Csaba Simandi",
-               "name" : "Csaba Simandi"
+               "drilldown" : "Csaba Simandi"
             },
             {
                "y" : 2,
@@ -45,8 +44,8 @@
             },
             {
                "drilldown" : "Duncan C. White",
-               "name" : "Duncan C. White",
-               "y" : 2
+               "y" : 2,
+               "name" : "Duncan C. White"
             },
             {
                "y" : 2,
@@ -54,39 +53,39 @@
                "name" : "E. Choroba"
             },
             {
-               "y" : 5,
                "name" : "Javier Luque",
-               "drilldown" : "Javier Luque"
+               "drilldown" : "Javier Luque",
+               "y" : 5
             },
             {
-               "y" : 2,
                "drilldown" : "Jorg Sommrey",
+               "y" : 2,
                "name" : "Jorg Sommrey"
             },
             {
                "y" : 4,
-               "name" : "Luca Ferrari",
-               "drilldown" : "Luca Ferrari"
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari"
             },
             {
                "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson",
-               "y" : 2
+               "y" : 2,
+               "name" : "Mark Anderson"
             },
             {
-               "y" : 7,
+               "name" : "Mohammad S Anwar",
                "drilldown" : "Mohammad S Anwar",
-               "name" : "Mohammad S Anwar"
+               "y" : 7
             },
             {
-               "y" : 4,
                "name" : "Myoungjin Jeon",
-               "drilldown" : "Myoungjin Jeon"
+               "drilldown" : "Myoungjin Jeon",
+               "y" : 4
             },
             {
+               "drilldown" : "Niels van Dijke",
                "y" : 2,
-               "name" : "Niels van Dijke",
-               "drilldown" : "Niels van Dijke"
+               "name" : "Niels van Dijke"
             },
             {
                "name" : "Noud Aldenhoven",
@@ -94,18 +93,23 @@
                "y" : 2
             },
             {
-               "y" : 2,
                "name" : "Pete Houston",
+               "y" : 2,
                "drilldown" : "Pete Houston"
             },
             {
-               "y" : 5,
+               "name" : "Richard Park",
+               "y" : 1,
+               "drilldown" : "Richard Park"
+            },
+            {
                "name" : "Roger Bell_West",
-               "drilldown" : "Roger Bell_West"
+               "drilldown" : "Roger Bell_West",
+               "y" : 5
             },
             {
-               "drilldown" : "Shahed Nooshmand",
                "name" : "Shahed Nooshmand",
+               "drilldown" : "Shahed Nooshmand",
                "y" : 3
             },
             {
@@ -114,26 +118,27 @@
                "y" : 3
             },
             {
-               "y" : 2,
+               "name" : "Simon Proctor",
                "drilldown" : "Simon Proctor",
-               "name" : "Simon Proctor"
+               "y" : 2
             },
             {
-               "name" : "Ulrich Rieke",
                "drilldown" : "Ulrich Rieke",
-               "y" : 4
+               "y" : 4,
+               "name" : "Ulrich Rieke"
             },
             {
-               "y" : 2,
+               "name" : "Walt Mankowski",
                "drilldown" : "Walt Mankowski",
-               "name" : "Walt Mankowski"
+               "y" : 2
             },
             {
-               "y" : 2,
                "drilldown" : "Wanderdoc",
+               "y" : 2,
                "name" : "Wanderdoc"
             }
-         ]
+         ],
+         "colorByPoint" : 1
       }
    ],
    "tooltip" : {
@@ -141,21 +146,25 @@
       "followPointer" : 1,
       "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
    },
+   "xAxis" : {
+      "type" : "category"
+   },
    "plotOptions" : {
       "series" : {
-         "borderWidth" : 0,
          "dataLabels" : {
             "enabled" : 1,
             "format" : "{point.y}"
-         }
+         },
+         "borderWidth" : 0
       }
    },
-   "chart" : {
-      "type" : "column"
+   "title" : {
+      "text" : "Perl Weekly Challenge - 070"
    },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Andrew Shitov",
             "data" : [
                [
                   "Raku",
@@ -166,8 +175,7 @@
                   2
                ]
             ],
-            "name" : "Andrew Shitov",
-            "id" : "Andrew Shitov"
+            "name" : "Andrew Shitov"
          },
          {
             "name" : "Arne Sommer",
@@ -188,6 +196,7 @@
             ]
          },
          {
+            "name" : "Athanasius",
             "data" : [
                [
                   "Perl",
@@ -198,12 +207,11 @@
                   2
                ]
             ],
-            "name" : "Athanasius",
             "id" : "Athanasius"
          },
          {
-            "id" : "Cheok-Yin Fung",
             "name" : "Cheok-Yin Fung",
+            "id" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
@@ -212,14 +220,14 @@
             ]
          },
          {
+            "id" : "Csaba Simandi",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
-            "name" : "Csaba Simandi",
-            "id" : "Csaba Simandi"
+            "name" : "Csaba Simandi"
          },
          {
             "name" : "Dave Jacoby",
@@ -232,26 +240,27 @@
             ]
          },
          {
-            "name" : "Duncan C. White",
             "id" : "Duncan C. White",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Duncan C. White"
          },
          {
-            "name" : "E. Choroba",
-            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "E. Choroba",
+            "name" : "E. Choroba"
          },
          {
+            "name" : "Javier Luque",
             "data" : [
                [
                   "Perl",
@@ -266,22 +275,21 @@
                   1
                ]
             ],
-            "name" : "Javier Luque",
             "id" : "Javier Luque"
          },
          {
+            "name" : "Jorg Sommrey",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Jorg Sommrey",
-            "name" : "Jorg Sommrey"
+            "id" : "Jorg Sommrey"
          },
          {
-            "id" : "Luca Ferrari",
             "name" : "Luca Ferrari",
+            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -294,16 +302,18 @@
             ]
          },
          {
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "name" : "Mark Anderson",
-            "id" : "Mark Anderson"
+            ]
          },
          {
+            "name" : "Mohammad S Anwar",
+            "id" : "Mohammad S Anwar",
             "data" : [
                [
                   "Perl",
@@ -317,13 +327,9 @@
                   "Blog",
                   3
                ]
-            ],
-            "id" : "Mohammad S Anwar",
-            "name" : "Mohammad S Anwar"
+            ]
          },
          {
-            "id" : "Myoungjin Jeon",
-            "name" : "Myoungjin Jeon",
             "data" : [
                [
                   "Perl",
@@ -333,37 +339,49 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Myoungjin Jeon",
+            "name" : "Myoungjin Jeon"
          },
          {
+            "id" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Niels van Dijke",
             "name" : "Niels van Dijke"
          },
          {
-            "name" : "Noud Aldenhoven",
-            "id" : "Noud Aldenhoven",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Noud Aldenhoven",
+            "name" : "Noud Aldenhoven"
          },
          {
+            "name" : "Pete Houston",
+            "id" : "Pete Houston",
             "data" : [
                [
                   "Perl",
                   2
                ]
+            ]
+         },
+         {
+            "id" : "Richard Park",
+            "data" : [
+               [
+                  "Blog",
+                  1
+               ]
             ],
-            "id" : "Pete Houston",
-            "name" : "Pete Houston"
+            "name" : "Richard Park"
          },
          {
             "data" : [
@@ -380,12 +398,10 @@
                   1
                ]
             ],
-            "name" : "Roger Bell_West",
-            "id" : "Roger Bell_West"
+            "id" : "Roger Bell_West",
+            "name" : "Roger Bell_West"
          },
          {
-            "id" : "Shahed Nooshmand",
-            "name" : "Shahed Nooshmand",
             "data" : [
                [
                   "Raku",
@@ -395,9 +411,12 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Shahed Nooshmand",
+            "name" : "Shahed Nooshmand"
          },
          {
+            "id" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -408,20 +427,20 @@
                   1
                ]
             ],
-            "id" : "Simon Green",
             "name" : "Simon Green"
          },
          {
+            "name" : "Simon Proctor",
+            "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "name" : "Simon Proctor",
-            "id" : "Simon Proctor"
+            ]
          },
          {
+            "name" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -432,8 +451,7 @@
                   2
                ]
             ],
-            "id" : "Ulrich Rieke",
-            "name" : "Ulrich Rieke"
+            "id" : "Ulrich Rieke"
          },
          {
             "data" : [
@@ -442,8 +460,8 @@
                   2
                ]
             ],
-            "name" : "Walt Mankowski",
-            "id" : "Walt Mankowski"
+            "id" : "Walt Mankowski",
+            "name" : "Walt Mankowski"
          },
          {
             "data" : [
@@ -461,8 +479,5 @@
       "title" : {
          "text" : "Total Solutions"
       }
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 070"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index abe44b4509..4cb9d44595 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,34 +1,28 @@
 {
-   "chart" : {
-      "type" : "column"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
    },
    "yAxis" : {
-      "min" : 0,
       "title" : {
          "text" : null
-      }
+      },
+      "min" : 0
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   "subtitle" : {
+      "text" : "Last updated at 2020-07-26 22:21:35 GMT"
    },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
-         }
-      }
+   "legend" : {
+      "enabled" : "false"
+   },
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
          "data" : [
             [
                "Blog",
-               833
+               834
             ],
             [
                "Perl",
@@ -41,23 +35,29 @@
          ],
          "name" : "Contributions",
          "dataLabels" : {
+            "align" : "right",
+            "color" : "#FFFFFF",
             "rotation" : -90,
-            "y" : 10,
             "format" : "{point.y:.0f}",
             "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
+               "fontFamily" : "Verdana, sans-serif",
+               "fontSize" : "13px"
             },
-            "color" : "#FFFFFF",
-            "align" : "right",
-            "enabled" : "true"
+            "enabled" : "true",
+            "y" : 10
          }
       }
    ],
-   "subtitle" : {
-      "text" : "Last updated at 2020-07-26 21:04:13 GMT"
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
    },
-   "legend" : {
-      "enabled" : "false"
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 8102cd10c0..a4e5ed506f 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,12 +1,400 @@
 {
+   "legend" : {
+      "enabled" : "false"
+   },
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-07-26 22:21:35 GMT"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "tooltip" : {
+      "followPointer" : "true",
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
    "chart" : {
       "type" : "column"
    },
+   "series" : [
+      {
+         "colorByPoint" : "true",
+         "name" : "Perl Weekly Challenge Languages",
+         "data" : [
+            {
+               "name" : "#001",
+               "drilldown" : "001",
+               "y" : 142
+            },
+            {
+               "y" : 109,
+               "drilldown" : "002",
+               "name" : "#002"
+            },
+            {
+               "name" : "#003",
+               "drilldown" : "003",
+               "y" : 71
+            },
+            {
+               "drilldown" : "004",
+               "y" : 91,
+               "name" : "#004"
+            },
+            {
+               "y" : 72,
+               "drilldown" : "005",
+               "name" : "#005"
+            },
+            {
+               "name" : "#006",
+               "y" : 52,
+               "drilldown" : "006"
+            },
+            {
+               "drilldown" : "007",
+               "y" : 59,
+               "name" : "#007"
+            },
+            {
+               "name" : "#008",
+               "y" : 72,
+               "drilldown" : "008"
+            },
+            {
+               "name" : "#009",
+               "y" : 68,
+               "drilldown" : "009"
+            },
+            {
+               "name" : "#010",
+               "drilldown" : "010",
+               "y" : 60
+            },
+            {
+               "name" : "#011",
+               "y" : 79,
+               "drilldown" : "011"
+            },
+            {
+               "y" : 83,
+               "drilldown" : "012",
+               "name" : "#012"
+            },
+            {
+               "name" : "#013",
+               "drilldown" : "013",
+               "y" : 76
+            },
+            {
+               "drilldown" : "014",
+               "y" : 96,
+               "name" : "#014"
+            },
+            {
+               "y" : 93,
+               "drilldown" : "015",
+               "name" : "#015"
+            },
+            {
+               "name" : "#016",
+               "drilldown" : "016",
+               "y" : 66
+            },
+            {
+               "y" : 79,
+               "drilldown" : "017",
+               "name" : "#017"
+            },
+            {
+               "name" : "#018",
+               "y" : 76,
+               "drilldown" : "018"
+            },
+            {
+               "name" : "#019",
+               "drilldown" : "019",
+               "y" : 97
+            },
+            {
+               "name" : "#020",
+               "drilldown" : "020",
+               "y" : 95
+            },
+            {
+               "name" : "#021",
+               "drilldown" : "021",
+               "y" : 67
+            },
+            {
+               "name" : "#022",
+               "y" : 63,
+               "drilldown" : "022"
+            },
+            {
+               "y" : 91,
+               "drilldown" : "023",
+               "name" : "#023"
+            },
+            {
+               "y" : 70,
+               "drilldown" : "024",
+               "name" : "#024"
+            },
+            {
+               "drilldown" : "025",
+               "y" : 55,
+               "name" : "#025"
+            },
+            {
+               "y" : 70,
+               "drilldown" : "026",
+               "name" : "#026"
+            },
+            {
+               "drilldown" : "027",
+               "y" : 58,
+               "name" : "#027"
+            },
+            {
+               "name" : "#028",
+               "y" : 78,
+               "drilldown" : "028"
+            },
+            {
+               "y" : 77,
+               "drilldown" : "029",
+               "name" : "#029"
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