Feature Request: Recommend and demonstrate a library for csv parsing.
jgarte opened this issue · comments
Just making a TODO
here for adding a tutorial on how to parse CSV.
I realize that you can parse csv with split-sequence but might be nice to show to do it with a proper csv parser.
This might be a good candidate/starting point:
https://github.com/AccelerationNet/cl-csv#examples
;; read a file into a list of lists
(cl-csv:read-csv #P"file.csv")
=> (("1" "2" "3") ("4" "5" "6"))
;; read a file that's tab delimited
(cl-csv:read-csv #P"file.tab" :separator #\Tab)
;; read a file and return a list of objects created from each row
(cl-csv:read-csv #P"file.csv"
:map-fn #'(lambda (row)
(make-instance 'object
:foo (nth 0 row)
:baz (nth 2 row))))
;; read csv from a string (streams also supported)
(cl-csv:read-csv "1,2,3
4,5,6")
=> (("1" "2" "3") ("4" "5" "6"))
;; loop over a CSV for effect
(let ((sum 0))
(cl-csv:do-csv (row #P"file.csv")
(incf sum (parse-integer (nth 0 row))))
sum)
;; loop over a CSV using iterate
(iter (for (foo bar baz) in-csv #P"file.csv")
(collect (make-instance 'object :foo foo :baz baz)))