September 2017 Update

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

@@ -0,0 +1,15 @@
+# Omit empty lines
+def read_csv:
+  split("\n")
+  | map(if length>0 then split(",") else empty end) ;
+
+# add_column(label) adds a summation column (with the given label) to
+# the matrix representation of the CSV table, and assumes that all the
+# entries in the body of the CSV file are, or can be converted to,
+# numbers:
+def add_column(label):
+  [.[0] + [label],
+   (reduce .[1:][] as $line
+     ([]; ($line|map(tonumber)) as $line | . + [$line + [$line|add]]))[] ] ;
+
+read_csv | add_column("SUM") | map(@csv)[]