- Added solutions by Colin Crain.

16 files changed, 1321 insertions, 1094 deletions

diff --git a/challenge-059/colin-crain/blog.txt b/challenge-059/colin-crain/blog.txt
new file mode 100644
index 0000000000..196a8bde29
--- /dev/null
+++ b/challenge-059/colin-crain/blog.txt
@@ -0,0 +1 @@
+https://colincrain.wordpress.com/2020/05/08/sorting-a-linked-list-and-summing-binary-bits/
diff --git a/challenge-059/colin-crain/perl/ch-1.pl b/challenge-059/colin-crain/perl/ch-1.pl
new file mode 100644
index 0000000000..ee71fb31ae
--- /dev/null
+++ b/challenge-059/colin-crain/perl/ch-1.pl
@@ -0,0 +1,88 @@
+use warnings;
+use strict;
+use feature ":5.26";
+
+## ## ## ## ## MAIN:
+
+## acquire the locus value and the array representation
+## of the linked list
+my ($locus, @input) = @ARGV;
+my $next = undef;
+my $node;
+
+## 1. convert the input commandline array into a linked list
+while (scalar @input > 0) {
+    my $value =  pop @input;
+    $node = new Node($value, $next);
+    $next = $node
+}
+## $node currently points to beginning of the list
+
+my $prelist_first;
+my $prelist_last;
+my $postlist_first;
+my $postlist_last;
+
+while (defined $node) {
+    ## 2a. if it is less than the given value, add it to
+    ##     the end of the pre list
+    if ($node->value < $locus) {
+        defined $prelist_last ? $prelist_last->next($node)
+                              : ($prelist_first = $node);
+        $prelist_last = $node;
+    }
+    ## 2b. if it is more than or equal to the given value
+    ##     add it to the end of the post list
+    else {
+        defined $postlist_last ? $postlist_last->next($node)
+                               : ($postlist_first = $node);
+        $postlist_last = $node;
+    }
+
+    $node = $node->next;
+}
+
+## 3. link the pre list to the post list:
+
+## 3a. point the last element of the pre list to
+##     the first element of the post
+$prelist_last->next($postlist_first) if (defined $prelist_last);
+
+## 3b. point the last element of the post list to null
+$postlist_last->{'next'} = undef;
+
+## ## ## output
+
+## if prelist never got made, start with the postlist
+$node = $prelist_first || $postlist_first;
+my @output;
+while (defined $node) {
+    push @output, $node->value;
+    $node = $node->next;
+}
+say join ' → ', @output;
+
+
+## ## ## ## ## NODE PACKAGE
+
+package Node;
+
+sub new {
+    my ($class, $value, $next)  = @_;
+    my $self     = { "value"    => $value,
+                     "next"     => $next    };
+    bless $self, $class;
+    return $self;
+}
+
+sub value {
+    my ($self, $value ) = @_;
+    $self->{value} = $value if defined $value;
+    return $self->{value}
+}
+
+sub next {
+    my ($self, $next ) = @_;
+    $self->{next} = $next if defined $next;
+    return $self->{next}
+}
diff --git a/challenge-059/colin-crain/perl/ch-2.pl b/challenge-059/colin-crain/perl/ch-2.pl
new file mode 100644
index 0000000000..7f9768a6f2
--- /dev/null
+++ b/challenge-059/colin-crain/perl/ch-2.pl
@@ -0,0 +1,35 @@
+use warnings;
+use strict;
+use feature ":5.26";
+
+use List::Util qw(sum);
+
+## ## ## ## ## MAIN:
+
+my @array = @ARGV;
+my @sets = choose_2_sets( @array );
+
+my $sum;
+for my $set ( @sets ) {
+    $sum += bit_difference($set->[0], $set->[1]);
+}
+
+say $sum;
+
+
+## ## ## ## ## SUBS:
+
+sub bit_difference {
+    return sum( split //, sprintf "%b", 0+$_[0] ^ 0+$_[1] );
+}
+
+sub choose_2_sets {
+    my @array = @_;
+     my @out;
+    for my $i (0..(scalar @array - 1)) {
+    	for my $j ($i+1..(scalar @array - 1)) {
+    		push @out, [ $array[$i], $array[$j] ];
+    	}
+    }
+    return @out;
+}
diff --git a/challenge-059/colin-crain/raku/ch-1.p6 b/challenge-059/colin-crain/raku/ch-1.p6
new file mode 100644
index 0000000000..b6c5975aee
--- /dev/null
+++ b/challenge-059/colin-crain/raku/ch-1.p6
@@ -0,0 +1,65 @@
+class Node {
+    has Int  $.value is rw;
+    has Node $.next  is rw;
+}
+
+class LinkedList {
+    has Node $.first is rw;
+    has Node $.last  is rw;
+
+    method populate_from_array ( @array ) {
+        my $node;
+        my $next;
+        while @array.elems > 0 {
+            $node = Node.new(value => @array.pop.Int);
+            $node.next = $next if $next.defined;
+            $next = $node;
+        }
+        $.first = $node;
+    }
+
+    method arrow_print () {
+        my @output;
+        my $node = $.first;
+        while (defined $node) {
+            push @output, $node.value;
+            $node = $node.next;
+        }
+        @output.join(' → ').say;
+    }
+}
+
+
+sub MAIN (Int:D $locus, *@input) {
+
+    ## 1. convert the input commandline array into a linked list
+    my $list = LinkedList.new();
+    $list.populate_from_array( @input );
+
+    my $before = LinkedList.new();
+    my $after  = LinkedList.new();
+    my $node   = $list.first;
+
+    ## 2a. if it is less than the given value, add it to
+    ##     the end of the before list
+    ## 2b. if it is more than or equal to the given value
+    ##     add it to the end of the after list
+    ## if a sublist isn't started, start it with the node
+    while $node.defined {
+        my $sublist = $node.value < $locus ?? $before !! $after;
+        $sublist.last.defined ?? $sublist.last.next
+                              !! $sublist.first       = $node;
+        $sublist.last = $node;
+        $node = $node.next;
+    }
+
+    ## 3. link the pre list to the post list:
+    ## 3a. point the last element of the pre list to
+    ##     the first element of the post
+    ## 3b. point the last element of the post list to null
+    $before.last.next = $after.first if defined $before.last;
+    $after.last.next  = Nil if defined $after.last;
+
+    # output
+    $list.arrow_print();
+}
diff --git a/challenge-059/colin-crain/raku/ch-2.p6 b/challenge-059/colin-crain/raku/ch-2.p6
new file mode 100644
index 0000000000..6a9add0bfe
--- /dev/null
+++ b/challenge-059/colin-crain/raku/ch-2.p6
@@ -0,0 +1,11 @@
+sub MAIN ( *@input ) {
+
+    my @sets = @input.combinations: 2;
+    my $sum = [+] @sets.map({bit_difference($_)});
+
+    $sum.say;
+}
+
+sub bit_difference ($array) {
+    return ([+^] |$array).base(2).comb.sum;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 60bef10ec5..6db261e8ba 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,12 +1,6 @@
 {
-   "chart" : {
-      "type" : "column"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 059"
+   "legend" : {
+      "enabled" : 0
    },
    "drilldown" : {
       "series" : [
@@ -25,8 +19,6 @@
             ]
          },
          {
-            "id" : "Cheok-Yin Fung",
-            "name" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
@@ -36,7 +28,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Cheok-Yin Fung",
+            "id" : "Cheok-Yin Fung"
          },
          {
             "data" : [
@@ -45,16 +39,32 @@
                   2
                ],
                [
-                  "Blog",
+                  "Raku",
                   2
+               ],
+               [
+                  "Blog",
+                  1
                ]
             ],
+            "name" : "Colin Crain",
+            "id" : "Colin Crain"
+         },
+         {
+            "id" : "Dave Jacoby",
             "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby"
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Blog",
+                  2
+               ]
+            ]
          },
          {
-            "id" : "E. Choroba",
-            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
@@ -64,7 +74,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "E. Choroba",
+            "id" : "E. Choroba"
          },
          {
             "name" : "Javier Luque",
@@ -95,18 +107,16 @@
             "name" : "Jorg Sommrey"
          },
          {
-            "name" : "Leo Manfredi",
-            "id" : "Leo Manfredi",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "id" : "Leo Manfredi",
+            "name" : "Leo Manfredi"
          },
          {
-            "id" : "Luca Ferrari",
-            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -116,7 +126,9 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari"
          },
          {
             "data" : [
@@ -129,22 +141,22 @@
                   1
                ]
             ],
-            "id" : "Mark Anderson",
-            "name" : "Mark Anderson"
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson"
          },
          {
-            "name" : "Markus Holzer",
-            "id" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Markus Holzer",
+            "name" : "Markus Holzer"
          },
          {
-            "id" : "Mohammad S Anwar",
             "name" : "Mohammad S Anwar",
+            "id" : "Mohammad S Anwar",
             "data" : [
                [
                   "Perl",
@@ -157,8 +169,6 @@
             ]
          },
          {
-            "name" : "Roger Bell_West",
-            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -168,41 +178,41 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Roger Bell_West",
+            "name" : "Roger Bell_West"
          },
          {
+            "name" : "Saif Ahmed",
+            "id" : "Saif Ahmed",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Saif Ahmed",
-            "name" : "Saif Ahmed"
+            ]
          },
          {
+            "name" : "Sangeet Kar",
+            "id" : "Sangeet Kar",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "Sangeet Kar",
-            "id" : "Sangeet Kar"
+            ]
          },
          {
+            "name" : "Simon Proctor",
+            "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "name" : "Simon Proctor",
-            "id" : "Simon Proctor"
+            ]
          },
          {
-            "id" : "Ulrich Rieke",
-            "name" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -212,7 +222,9 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke"
          },
          {
             "name" : "Wanderdoc",
@@ -236,13 +248,18 @@
          }
       ]
    },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
    "series" : [
       {
          "data" : [
             {
-               "drilldown" : "Arne Sommer",
+               "y" : 3,
                "name" : "Arne Sommer",
-               "y" : 3
+               "drilldown" : "Arne Sommer"
             },
             {
                "y" : 3,
@@ -250,6 +267,11 @@
                "drilldown" : "Cheok-Yin Fung"
             },
             {
+               "y" : 5,
+               "drilldown" : "Colin Crain",
+               "name" : "Colin Crain"
+            },
+            {
                "y" : 4,
                "drilldown" : "Dave Jacoby",
                "name" : "Dave Jacoby"
@@ -260,19 +282,19 @@
                "drilldown" : "E. Choroba"
             },
             {
+               "y" : 5,
                "name" : "Javier Luque",
-               "drilldown" : "Javier Luque",
-               "y" : 5
+               "drilldown" : "Javier Luque"
             },
             {
                "y" : 2,
-               "name" : "Jorg Sommrey",
-               "drilldown" : "Jorg Sommrey"
+               "drilldown" : "Jorg Sommrey",
+               "name" : "Jorg Sommrey"
             },
             {
-               "y" : 1,
                "name" : "Leo Manfredi",
-               "drilldown" : "Leo Manfredi"
+               "drilldown" : "Leo Manfredi",
+               "y" : 1
             },
             {
                "name" : "Luca Ferrari",
@@ -280,23 +302,23 @@
                "y" : 4
             },
             {
+               "y" : 2,
                "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson",
-               "y" : 2
+               "name" : "Mark Anderson"
             },
             {
-               "drilldown" : "Markus Holzer",
                "name" : "Markus Holzer",
+               "drilldown" : "Markus Holzer",
                "y" : 2
             },
             {
-               "y" : 4,
+               "drilldown" : "Mohammad S Anwar",
                "name" : "Mohammad S Anwar",
-               "drilldown" : "Mohammad S Anwar"
+               "y" : 4
             },
             {
-               "name" : "Roger Bell_West",
                "drilldown" : "Roger Bell_West",
+               "name" : "Roger Bell_West",
                "y" : 4
             },
             {
@@ -310,19 +332,19 @@
                "name" : "Sangeet Kar"
             },
             {
+               "y" : 2,
                "name" : "Simon Proctor",
-               "drilldown" : "Simon Proctor",
-               "y" : 2
+               "drilldown" : "Simon Proctor"
             },
             {
-               "y" : 3,
+               "name" : "Ulrich Rieke",
                "drilldown" : "Ulrich Rieke",
-               "name" : "Ulrich Rieke"
+               "y" : 3
             },
             {
                "y" : 2,
-               "name" : "Wanderdoc",
-               "drilldown" : "Wanderdoc"
+               "drilldown" : "Wanderdoc",
+               "name" : "Wanderdoc"
             },
             {
                "y" : 1,
@@ -334,29 +356,30 @@
          "colorByPoint" : 1
       }
    ],
-   "legend" : {
-      "enabled" : 0
+   "xAxis" : {
+      "type" : "category"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 19] Last updated at 2020-05-09 08:03:05 GMT"
+   },
+   "tooltip" : {
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : 1
    },
    "plotOptions" : {
       "series" : {
+         "borderWidth" : 0,
          "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
       }
    },
-   "subtitle" : {
-      "text" : "[Champions: 18] Last updated at 2020-05-09 02:41:32 GMT"
+   "chart" : {
+      "type" : "column"
    },
-   "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/>"
+   "title" : {
+      "text" : "Perl Weekly Challenge - 059"
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 44b7cd0cea..402184d884 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,63 +1,63 @@
 {
-   "legend" : {
-      "enabled" : "false"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2020-05-09 02:41:32 GMT"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
    },
    "chart" : {
       "type" : "column"
    },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      }
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   "subtitle" : {
+      "text" : "Last updated at 2020-05-09 08:03:05 GMT"
    },
    "series" : [
       {
          "name" : "Contributions",
          "dataLabels" : {
-            "color" : "#FFFFFF",
             "enabled" : "true",
-            "rotation" : -90,
-            "align" : "right",
-            "y" : 10,
             "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
             },
-            "format" : "{point.y:.0f}"
+            "rotation" : -90,
+            "y" : 10,
+            "color" : "#FFFFFF",
+            "format" : "{point.y:.0f}",
+            "align" : "right"
          },
          "data" : [
             [
                "Blog",
-               668
+               669
             ],
             [
                "Perl",
-               2482
+               2484
             ],
             [
                "Raku",
-               1557
+               1559
             ]
          ]
       }
-   ]
+   ],
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      },
+      "type" : "category"
+   },
+   "yAxis" : {
+      "min" : 0,
+      "title" : {
+         "text" : null
+      }
+   },
+   "legend" : {
+      "enabled" : "false"
+   }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 962c57bd6d..d8cce497f8 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,312 +1,15 @@
 {
-   "series" : [
-      {
-         "data" : [
-            {
-               "y" : 140,
-               "name" : "#001",
-               "drilldown" : "001"
-            },
-            {
-               "y" : 109,
-               "name" : "#002",
-               "drilldown" : "002"
-            },
-            {
-               "drilldown" : "003",
-               "name" : "#003",
-               "y" : 71
-            },
-            {
-               "y" : 91,
-               "name" : "#004",
-               "drilldown" : "004"
-            },
-            {
-               "y" : 71,
-               "drilldown" : "005",
-               "name" : "#005"
-            },
-            {
-               "name" : "#006",
-               "drilldown" : "006",
-               "y" : 52
-            },
-            {
-               "name" : "#007",
-               "drilldown" : "007",
-               "y" : 58
-            },
-            {
-               "y" : 70,
-               "name" : "#008",
-               "drilldown" : "008"
-            },
-            {
-               "y" : 68,
-               "drilldown" : "009",
-               "name" : "#009"
-            },
-            {
-               "name" : "#010",
-               "drilldown" : "010",
-               "y" : 60
-            },
-            {
-               "y" : 79,
-               "drilldown" : "011",
-               "name" : "#011"
-            },
-            {
-               "y" : 83,
-               "drilldown" : "012",
-               "name" : "#012"
-            },
-            {
-               "y" : 76,
-               "name" : "#013",
-               "drilldown" : "013"
-            },
-            {
-               "y" : 96,
-               "name" : "#014",
-               "drilldown" : "014"
-            },
-            {
-               "drilldown" : "015",
-               "name" : "#015",
-               "y" : 93
-            },
-            {
-               "drilldown" : "016",
-               "name" : "#016",
-               "y" : 66
-            },
-            {
-               "name" : "#017",
-               "drilldown" : "017",
-               "y" : 79
-            },
-            {
-               "y" : 76,
-               "drilldown" : "018",
-               "name" : "#018"
-            },
-            {
-               "name" : "#019",
-               "drilldown" : "019",
-               "y" : 97
-            },
-            {
-               "y" : 95,
-               "name" : "#020",
-               "drilldown" : "020"
-            },
-            {
-               "name" : "#021",
-               "drilldown" : "021",
-               "y" : 67
-            },
-            {
-               "y" : 63,
-               "name" : "#022",
-               "drilldown" : "022"
-            },
-            {
-               "drilldown" : "023",
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-               "name" : "#041"
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-               "drilldown" : "042",
-               "name" : "#042"
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-               "name" : "#044",
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-               "drilldown" : "045",
-               "name" : "#045"
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-               "drilldown" : "046",
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-            {
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-               "name" : "#047",
-               "y" : 82
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-            {
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-               "drilldown" : "048",
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-            {
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-               "name" : "#049",
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-               "name" : "#050",
-               "drilldown" : "050"
-            },
-            {
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-               "drilldown" : "051",
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-            {
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-               "name" : "#052",
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-            },
-            {
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-               "drilldown" : "053",
-               "name" : "#053"
-            },
-            {
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-               "drilldown" : "054",
-               "name" : "#054"
-            },
-            {
-               "drilldown" : "055",
-               "name" : "#055",
-               "y" : 86
-            },
-            {
-               "y" : 93,
-               "name" : "#056",
-               "drilldown" : "056"
-            },
-            {
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-               "drilldown" : "057",
-               "name" : "#057"
-            },
-            {
-               "y" : 60,
-               "name" : "#058",
-               "drilldown" : "058"
-            },
-            {
-               "drilldown" : "059",
-               "name" : "#059",
-               "y" : 49
-            }
-         ],
-         "colorByPoint" : "true",
-         "name" : "Perl Weekly Challenge Languages"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
       }
-   ],
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
-            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -320,7 +23,9 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "001",
+            "id" : "001"
          },
          {
             "data" : [
@@ -359,8 +64,8 @@
             "name" : "003"
          },
          {
-            "name" : "004",
             "id" : "004",
+            "name" : "004",
             "data" : [
                [
                   "Perl",
@@ -377,8 +82,8 @@
             ]
          },
          {
-            "id" : "005",
             "name" : "005",
+            "id" : "005",
             "data" : [
                [
                   "Perl",
@@ -413,8 +118,6 @@