September 2017 Update

Task/Text-processing-2/Jq/text-processing-2-2.jq

@@ -0,0 +1,16 @@
+# Given any array, produce an array of [item, count] pairs for each run.
+def runs:
+  reduce .[] as $item
+    ( [];
+      if . == [] then [ [ $item, 1] ]
+      else  .[length-1] as $last
+            | if $last[0] == $item then (.[0:length-1] + [ [$item, $last[1] + 1] ] )
+              else . + [[$item, 1]]
+              end
+      end ) ;
+
+def is_float: test("^[-+]?[0-9]*[.][0-9]*([eE][-+]?[0-9]+)?$");
+
+def is_integral: test("^[-+]?[0-9]+$");
+
+def is_date: test("[12][0-9]{3}-[0-9][0-9]-[0-9][0-9]");