From: Christian Smith Date: 2010-07-03T02:15:06+09:00 Subject: Re: FasterCSV - Merge CSV Rob Biedenharn wrote: > On Jul 2, 2010, at 7:11 AM, Brian Candler wrote: >>> >>> csv4 96 lines 10 cols >>> >>> Thanks! >>> >>> Seed >> >> Why use fastercsv? >> cat csv1 csv2 csv3 >csv4 >> would meet your requirement. > > except that you'd have headers from csv2 and csv3 (but perhaps your > line counts imply no headers?) > >> >> But if you want to use fastercsv, then open each file in turn, read it >> line at a time, and output the line you just read. >> -- > > If the files are small-ish, you can avoid a chicken-and-egg problem of > the headers by reading all the input files (saving the headers from > the first), then writing it all out from memory. > > -Rob > > Rob Biedenharn > Rob@AgileConsultingLLC.com http://AgileConsultingLLC.com/ > rab@GaslightSoftware.com http://GaslightSoftware.com/ If the files are small-ish, you can avoid a chicken-and-egg problem of the headers by reading all the input files (saving the headers from the first), then writing it all out from memory. The files aren't smallish but memory isn't an issue. I would love to be able to do this. I am able to read the 3 files into an array but it's parsing them back into 1 csv I am having trouble with. I would assume this would be a lot faster than a line read>write approach. -- Posted via http://www.ruby-forum.com/.