September 2017 Update

Task/Loop-over-multiple-arrays-simultaneously/Jq/loop-over-multiple-arrays-simultaneously-1.jq

@@ -0,0 +1,5 @@
+# zip/0 emits [] if input is [].
+
+def zip:
+  . as $in
+  | [range(0; $in[0]|length) as $i | $in | map( .[$i] ) ];

Task/Loop-over-multiple-arrays-simultaneously/Jq/loop-over-multiple-arrays-simultaneously-2.jq

@@ -0,0 +1,8 @@
+# transpose a possibly jagged matrix
+def transpose:
+  if . == [] then []
+  else (.[1:] | transpose) as $t
+  | .[0] as $row
+  | reduce range(0; [($t|length), (.[0]|length)] | max) as $i
+         ([]; . + [ [ $row[$i] ] + $t[$i] ])
+  end;