Update csv-functions.sh

csv-functions.sh

@@ -12,8 +12,11 @@ alias csv.unquote='sed "s/\"//g"'
 # split a comma-delimited row onto separate lines
 alias csv.split='sed -e "s/,/\\n/g"'
 
+# produce awk expression suitable for selecting the requested columns
+csv.awk_select_column() { awk 'BEGIN {for (i=1; i < ARGC; i++) printf "$" ARGV[i] ", "}' $@ | rev | cut -c 3- | rev }
+
 # select a single column from a CSV by its index, starting at 1
-csv.select_column() { awk -F, "{print \$$1}" }
+csv.select_column() { awk -F, "BEGIN{OFS = \",\"} { print `csv.awk_select_column $@` }" }
 
 # limit number of rows returned
 csv.limit() { head -n $1 }