- Added solutions by Feng Chang.

9 files changed, 710 insertions, 691 deletions

diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index a1c0e30d7a..ef870caaba 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,38 +1,106 @@
 {
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
+   "series" : [
+      {
+         "data" : [
+            {
+               "drilldown" : "Andrezgz",
+               "name" : "Andrezgz",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby",
+               "y" : 3
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Duane Powell",
+               "name" : "Duane Powell"
+            },
+            {
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba",
+               "y" : 3
+            },
+            {
+               "name" : "Feng Chang",
+               "drilldown" : "Feng Chang",
+               "y" : 4
+            },
+            {
+               "y" : 2,
+               "name" : "Kevin Colyer",
+               "drilldown" : "Kevin Colyer"
+            },
+            {
+               "y" : 5,
+               "name" : "Laurent Rosenfeld",
+               "drilldown" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 2,
+               "name" : "Lubos Kolouch",
+               "drilldown" : "Lubos Kolouch"
+            },
+            {
+               "drilldown" : "Michael Hamlin",
+               "name" : "Michael Hamlin",
+               "y" : 1
+            },
+            {
+               "y" : 2,
+               "name" : "Noud",
+               "drilldown" : "Noud"
+            },
+            {
+               "name" : "Roger Bell West",
+               "drilldown" : "Roger Bell West",
+               "y" : 2
+            },
+            {
+               "y" : 1,
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor"
+            },
+            {
+               "name" : "Veesh Goldman",
+               "drilldown" : "Veesh Goldman",
+               "y" : 4
+            }
+         ],
+         "colorByPoint" : 1,
+         "name" : "Perl Weekly Challenge - 017"
       }
-   },
-   "subtitle" : {
-      "text" : "[Champions: 12] Last updated at 2019-07-20 18:45:14 GMT"
+   ],
+   "chart" : {
+      "type" : "column"
    },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "xAxis" : {
-      "type" : "category"
+   "subtitle" : {
+      "text" : "[Champions: 13] Last updated at 2019-07-20 20:00:07 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/>",
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             "data" : [
                [
                   "Perl 5",
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                ]
             ],
-            "name" : "Andrezgz",
-            "id" : "Andrezgz"
+            "name" : "Andrezgz"
          },
          {
-            "id" : "Dave Jacoby",
             "name" : "Dave Jacoby",
             "data" : [
                [
@@ -43,19 +111,22 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Dave Jacoby"
          },
          {
+            "id" : "Duane Powell",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
-            "name" : "Duane Powell",
-            "id" : "Duane Powell"
+            "name" : "Duane Powell"
          },
          {
+            "id" : "E. Choroba",
+            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl 5",
@@ -65,21 +136,34 @@
                   "Blog",
                   1
                ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl 5",
+                  2
+               ],
+               [
+                  "Perl 6",
+                  2
+               ]
             ],
-            "id" : "E. Choroba",
-            "name" : "E. Choroba"
+            "name" : "Feng Chang",
+            "id" : "Feng Chang"
          },
          {
-            "name" : "Kevin Colyer",
-            "id" : "Kevin Colyer",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "name" : "Kevin Colyer",
+            "id" : "Kevin Colyer"
          },
          {
+            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl 5",
@@ -94,58 +178,57 @@
                   1
                ]
             ],
-            "name" : "Laurent Rosenfeld",
-            "id" : "Laurent Rosenfeld"
+            "name" : "Laurent Rosenfeld"
          },
          {
+            "name" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
-            "name" : "Lubos Kolouch",
             "id" : "Lubos Kolouch"
          },
          {
-            "id" : "Michael Hamlin",
             "name" : "Michael Hamlin",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ]
+            ],
+            "id" : "Michael Hamlin"
          },
          {
-            "name" : "Noud",
             "id" : "Noud",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "name" : "Noud"
          },
          {
+            "id" : "Roger Bell West",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
-            "name" : "Roger Bell West",
-            "id" : "Roger Bell West"
+            "name" : "Roger Bell West"
          },
          {
-            "id" : "Simon Proctor",
             "name" : "Simon Proctor",
             "data" : [
                [
                   "Perl 6",
                   1
                ]
-            ]
+            ],
+            "id" : "Simon Proctor"
          },
          {
             "data" : [
@@ -162,91 +245,27 @@
                   1
                ]
             ],
-            "id" : "Veesh Goldman",
-            "name" : "Veesh Goldman"
+            "name" : "Veesh Goldman",
+            "id" : "Veesh Goldman"
          }
       ]
    },
-   "tooltip" : {
-      "followPointer" : 1,
-      "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/>"
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-               "name" : "Andrezgz",
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-            {
-               "y" : 3,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Duane Powell",
-               "name" : "Duane Powell"
-            },
-            {
-               "y" : 3,
-               "drilldown" : "E. Choroba",
-               "name" : "E. Choroba"
-            },
-            {
-               "name" : "Kevin Colyer",
-               "drilldown" : "Kevin Colyer",
-               "y" : 2
-            },
-            {
-               "y" : 5,
-               "name" : "Laurent Rosenfeld",
-               "drilldown" : "Laurent Rosenfeld"
-            },
-            {
-               "drilldown" : "Lubos Kolouch",
-               "name" : "Lubos Kolouch",
-               "y" : 2
-            },
-            {
-               "y" : 1,
-               "name" : "Michael Hamlin",
-               "drilldown" : "Michael Hamlin"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Noud",
-               "name" : "Noud"
-            },
-            {
-               "y" : 2,
-               "name" : "Roger Bell West",
-               "drilldown" : "Roger Bell West"
-            },
-            {
-               "name" : "Simon Proctor",
-               "drilldown" : "Simon Proctor",
-               "y" : 1
-            },
-            {
-               "name" : "Veesh Goldman",
-               "drilldown" : "Veesh Goldman",
-               "y" : 4
-            }
-         ],
-         "colorByPoint" : 1,
-         "name" : "Perl Weekly Challenge - 017"
-      }
-   ],
-   "chart" : {
-      "type" : "column"
-   },
    "legend" : {
       "enabled" : 0
    },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
    "title" : {
       "text" : "Perl Weekly Challenge - 017"
+   },
+   "xAxis" : {
+      "type" : "category"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 719ab10868..6043288574 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,6 +1,9 @@
 {
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions - 2019"
+   },
    "subtitle" : {
-      "text" : "Last updated at 2019-07-20 18:45:38 GMT"
+      "text" : "Last updated at 2019-07-20 20:00:19 GMT"
    },
    "yAxis" : {
       "min" : 0,
@@ -8,8 +11,20 @@
          "text" : null
       }
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions - 2019"
+   "legend" : {
+      "enabled" : "false"
+   },
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontFamily" : "Verdana, sans-serif",
+            "fontSize" : "13px"
+         }
+      },
+      "type" : "category"
+   },
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
@@ -20,44 +35,29 @@
             ],
             [
                "Perl 5",
-               692
+               694
             ],
             [
                "Perl 6",
-               394
+               396
             ]
          ],
-         "name" : "Contributions",
          "dataLabels" : {
+            "enabled" : "true",
+            "y" : 10,
+            "format" : "{point.y:.0f}",
+            "align" : "right",
             "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
             },
-            "format" : "{point.y:.0f}",
             "color" : "#FFFFFF",
-            "align" : "right",
-            "y" : 10,
-            "enabled" : "true",
             "rotation" : -90
-         }
+         },
+         "name" : "Contributions"
       }
    ],
    "tooltip" : {
       "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
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-            "fontSize" : "13px"
-         }
-      }
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "chart" : {
-      "type" : "column"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index f437f63fc3..99c5eeb759 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,125 +1,9 @@
 {
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2019-07-20 18:45:38 GMT"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
-   },
-   "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/>"
-   },
-   "xAxis" : {
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-   },
-   "legend" : {
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-   },
-   "series" : [
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-         "name" : "Perl Weekly Challenge Languages",
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-               "y" : 123,
-               "name" : "#001",
-               "drilldown" : "001"
-            },
-            {
-               "drilldown" : "002",
-               "name" : "#002",
-               "y" : 104
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-               "drilldown" : "010"
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-               "drilldown" : "016"
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-               "name" : "#017",
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-         ]
-      }
-   ],
-   "chart" : {
-      "type" : "column"
-   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "001",
+            "name" : "001",
             "data" : [
                [
                   "Perl 5",
@@ -133,9 +17,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "001",
-            "name" : "001"
+            ]
          },
          {
             "data" : [
@@ -152,11 +34,10 @@
                   9
                ]
             ],
-            "id" : "002",
-            "name" : "002"
+            "name" : "002",
+            "id" : "002"
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-            "name" : "003",
             "data" : [
                [
                   "Perl 5",
@@ -171,10 +52,12 @@
                   8
                ]
             ],
+            "name" : "003",
             "id" : "003"
          },
          {
             "id" : "004",
+            "name" : "004",
             "data" : [
                [
                   "Perl 5",
@@ -188,11 +71,9 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "004"
+            ]
          },
          {
-            "name" : "005",
             "data" : [
                [
                   "Perl 5",
@@ -207,10 +88,10 @@
                   11
                ]
             ],
-            "id" : "005"
+            "id" : "005",
+            "name" : "005"
          },
          {
-            "name" : "006",
             "data" : [
                [
                   "Perl 5",
@@ -225,10 +106,10 @@
                   6
                ]
             ],
+            "name" : "006",
             "id" : "006"
          },
          {
-            "name" : "007",
             "data" : [
                [
                   "Perl 5",
@@ -243,10 +124,10 @@
                   8
                ]
             ],
-            "id" : "007"
+            "id" : "007",
+            "name" : "007"
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-            "name" : "008",
             "data" : [
                [
                   "Perl 5",
@@ -261,9 +142,12 @@
                   9
                ]
             ],
-            "id" : "008"
+            "id" : "008",
+            "name" : "008"
          },
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+            "id" : "009",
+            "name" : "009",
             "data" : [
                [
                   "Perl 5",
@@ -277,11 +161,10 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "009",
-            "name" : "009"
+            ]
          },
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+            "name" : "010",
             "id" : "010",
             "data" : [
                [
@@ -296,11 +179,11 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "010"
+            ]
          },
          {
             "id" : "011",
+            "name" : "011",
             "data" : [
                [
                   "Perl 5",
@@ -314,10 +197,10 @@
                   "Blog",
                   8
                ]
-            ],
-            "name" : "011"
+            ]
          },
          {
+            "name" : "012",
             "id" : "012",
             "data" : [
                [
@@ -332,11 +215,9 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "012"
+            ]
          },
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-            "id" : "013",
             "data" : [
                [
                   "Perl 5",
@@ -351,10 +232,10 @@
                   11
                ]
             ],
-            "name" : "013"
+            "name" : "013",
+            "id" : "013"
          },
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-            "name" : "014",
             "data" : [
                [
                   "Perl 5",
@@ -369,9 +250,12 @@
                   13
                ]
             ],
-            "id" : "014"
+            "id" : "014",
+            "name" : "014"
          },
          {
+            "id" : "015",
+            "name" : "015",
             "data" : [
                [
                   "Perl 5",
@@ -385,12 +269,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "015",
-            "name" : "015"
+            ]
          },
          {
-            "name" : "016",
             "data" : [
                [
                   "Perl 5",
@@ -405,6 +286,7 @@
                   10
                ]
             ],
+            "name" : "016",
             "id" : "016"
          },
          {
@@ -413,11 +295,11 @@
             "data" : [
                [
                   "Perl 5",
-                  17
+                  19
                ],
                [
                   "Perl 6",
-                  8
+                  10
                ],
                [
                   "Blog",
@@ -427,13 +309,131 @@
          }
       ]
    },
+   "title" : {
+      "text" : "Perl Weekly Challenge Language"
+   },
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2019-07-20 20:00:19 GMT"
+   },
    "plotOptions" : {
       "series" : {
+         "borderWidth" : 0,
          "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
+   "tooltip" : {
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "followPointer" : "true"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "series" : [
+      {
+         "colorByPoint" : "true",
+         "data" : [
+            {
+               "y" : 123,
+               "name" : "#001",
+               "drilldown" : "001"
+            },
+            {
+               "name" : "#002",
+               "y" : 104,
+               "drilldown" : "002"
+            },
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+               "drilldown" : "003",
+               "y" : 66,
+               "name" : "#003"
+            },
+            {
+               "y" : 84,
+               "name" : "#004",
+               "drilldown" : "004"
+            },
+            {
+               "drilldown" : "005",
+               "name" : "#005",
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+            },
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+               "name" : "#006",
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+               "name" : "#007",
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+               "name" : "#008",
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+               "drilldown" : "009",
+               "name" : "#009",
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+            },
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+               "name" : "#010",
+               "drilldown" : "010"
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+               "y" : 77,
+               "name" : "#011"
+            },
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+               "y" : 81,
+               "name" : "#012",
+               "drilldown" : "012"
+            },
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+               "y" : 74,
+               "name" : "#013",
+               "drilldown" : "013"
+            },
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+               "name" : "#014",
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+               "drilldown" : "015"
+            },
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+               "drilldown" : "016"
+            },
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+               "drilldown" : "017"
+            }
+         ],
+         "name" : "Perl Weekly Challenge Languages"
+      }
+   ],
+   "legend" : {
+      "enabled" : "false"
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
       }
    }
 }
diff --git a/stats/pwc-leaders.json b/stats/pwc-leaders.json
index 1aa54b4c26..e6eb1027e0 100644
--- a/stats/pwc-leaders.json
+++ b/stats/pwc-leaders.json
@@ -1,29 +1,47 @@
 {
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         },
+         "borderWidth" : 0
+      }
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
    "subtitle" : {
-      "text" : "Click the columns to drilldown the score breakdown. Last updated at 2019-07-20 18:45:33 GMT"
+      "text" : "Click the columns to drilldown the score breakdown. Last updated at 2019-07-20 20:00:12 GMT"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "xAxis" : {
+      "type" : "category"
    },
    "drilldown" : {
       "series" : [
          {
-            "id" : "Laurent Rosenfeld",
             "data" : [
                [
+                  "Perl 6",
+                  33
+               ],
+               [
                   "Blog",
                   21
                ],
                [
                   "Perl 5",
                   34
-               ],
-               [
-                  "Perl 6",
-                  33
                ]
             ],
+            "id" : "Laurent Rosenfeld",
             "name" : "Laurent Rosenfeld"
          },
          {
-            "name" : "Joelle Maslak",
+            "id" : "Joelle Maslak",
             "data" : [
                [
                   "Blog",
@@ -38,25 +56,25 @@
                   40
                ]
             ],
-            "id" : "Joelle Maslak"
+            "name" : "Joelle Maslak"
          },
          {
             "name" : "Jaldhar H. Vyas",
+            "id" : "Jaldhar H. Vyas",
             "data" : [
                [
-                  "Blog",
-                  3
+                  "Perl 5",
+                  31
                ],
                [
                   "Perl 6",
                   31
                ],
                [
-                  "Perl 5",
-                  31
+                  "Blog",
+                  3
                ]
-            ],
-            "id" : "Jaldhar H. Vyas"
+            ]
          },
          {
             "id" : "Ruben Westerberg",
@@ -73,38 +91,40 @@
             "name" : "Ruben Westerberg"
          },
          {
-            "id" : "Athanasius",
+            "name" : "Athanasius",
             "data" : [
                [
+                  "Perl 6",
+                  11
+               ],
+               [
                   "Blog",
                   3
                ],
                [
                   "Perl 5",
                   35
-               ],
-               [
-                  "Perl 6",
-                  11
                ]
             ],
-            "name" : "Athanasius"
+            "id" : "Athanasius"
          },
          {
+            "name" : "Adam Russell",
+            "id" : "Adam Russell",
             "data" : [
                [
-                  "Blog",
-                  16
-               ],
-               [
                   "Perl 5",
                   32
+               ],
+               [
+                  "Blog",
+                  16
                ]
-            ],
-            "id" : "Adam Russell",
-            "name" : "Adam Russell"
+            ]
          },
          {
+            "name" : "Arne Sommer",
+            "id" : "Arne Sommer",
             "data" : [
                [
                   "Blog",
@@ -114,12 +134,11 @@
                   "Perl 6",
                   29
                ]
-            ],
-            "id" : "Arne Sommer",
-            "name" : "Arne Sommer"
+            ]
          },
          {
             "name" : "E. Choroba",
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Blog",
@@ -129,47 +148,45 @@
                   "Perl 5",
                   26
                ]
-            ],
-            "id" : "E. Choroba"
+            ]
          },
          {
-            "name" : "Simon Proctor",
-            "id" : "Simon Proctor",
             "data" : [
                [
-                  "Perl 5",
-                  4
+                  "Blog",
+                  7
                ],
                [
                   "Perl 6",
                   27
                ],
                [
-                  "Blog",
-                  7
+                  "Perl 5",
+                  4
                ]
-            ]
+            ],
+            "id" : "Simon Proctor",
+            "name" : "Simon Proctor"
          },
          {
             "id" : "Dave Jacoby",
             "data" : [
                [
-                  "Blog",
-                  15
+                  "Perl 5",
+                  21
                ],
                [
                   "Perl 6",
                   1
                ],
                [
-                  "Perl 5",
-                  21
+                  "Blog",
+                  15
                ]
             ],
             "name" : "Dave Jacoby"
          },
          {
-            "name" : "Kian-Meng Ang",
             "id" : "Kian-Meng Ang",
             "data" : [
                [
@@ -180,31 +197,32 @@
                   "Blog",