Data commit

Task/CSV-data-manipulation/Jq/csv-data-manipulation.jq

@@ -0,0 +1,20 @@
+# Input: a single row
+# Omit empty rows
+def read_csv:
+  if length>0 then split(",") else empty end ;
+
+# Input: an array
+# Output: the same array but with an additional summation column.
+# If .[0] is a number, then it is assumed the entire row consists of numbers or numeric strings;
+# otherwise, 0 is added
+def add_sum:
+  (if .[0] | type == "number" then (map(tonumber) | add) else 0 end) as $sum
+  | . + [$sum] ;
+
+# `tocsv` is only needed if fields should only be quoted by necessity:
+def tocsv:
+  map( if type == "string" and test("[,\"\r\n]") then "\"\(.)\"" else . end )
+  | join(",");
+
+( input | read_csv | . + ["SUM"] | @csv),
+(inputs | read_csv | add_sum | @csv)