csv to nested list?

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csv to nested list?

Postby tomtoo » Sun Oct 29, 2017 1:29 pm

Hi guys,

I would like to use lookup and/or assoc to generate html tables. The source data will come from 4 different csv (maybe tsv) files.

This bit from the manual seems almost perfect:

Code: Select all
(set 'persons '(
      (id001 (name "Anne") (address (country "USA") (city "New York")))
      (id002 (name "Jean") (address (country "France") (city "Paris")))

Or this:
Code: Select all
(set 'persons '(
    ("John Doe" 35 "M" 12.34)
    ("Mickey Mouse" 65 "N" 12345678)

I'm having trouble working out how to populate my list with elements from the different sources.


It seems like this is a common enough scenario, but I can't quite get it without things getting really ugly.

Thanks :-)
Posts: 46
Joined: Wed Oct 28, 2009 10:00 pm

Re: csv to nested list?

Postby ralph.ronnquist » Mon Oct 30, 2017 4:59 am

Doing it properly might require a proper CSV parser, like

I must admit I haven't tried it myself, but it looks fine at a glance.

Load that file, then it's simply a matter of
Code: Select all
(CSV:parse-file csvfile)
if you're using comma as delimiter and double-quote as quote character.
Posts: 209
Joined: Mon Jun 02, 2014 1:40 am
Location: Melbourne, Australia

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