[REBOL] Speed and Memory Management in REBOL Re:
From: ryanc:iesco-dms at: 5-Sep-2000 13:47
[princepawn--lycos--com] wrote:
> I was glancing at one of the most popular scripts at the REBOL archive and developed
some questions:
>
> 1- Is it possible to incrementally write to a file in REBOL?
autos: open/new %autos.txt
insert autos "Ford"
insert tail autos " Chevy"
close autos
> 2- Is it possible to append to a file in REBOL
write/append %test.txt "test"
> 3- This script seems in-efficient and memory wasteful: it reads and entire file into
a temporary array and then converts the array. In Perl, I could do each conversion as
I read in each line and write each line out after each conversion.
>
> REBOL [
> Title: "Comma-Seperated-Values to REBOL converter"
> Date: 16-Jun-1999
> Author: "Bohdan Lechnowsky"
> Email: [bo--rebol--com]
> File: %convert-csv.r
> Purpose: {
> Convert CSV files to REBOL blocks
> }
> Category: [file util db text 2]
> ]
>
> csv: read/lines to-file ask "Filename to convert from CSV: "
>
> block: make block! 100
>
> headings: parse/all first csv ","
>
> foreach line next csv [append block parse/all line ","]
>
> save to-file ask "Filename to save to: " head insert/only block headings
>
> Get your FREE Email and Voicemail at Lycos Communications at
> http://comm.lycos.com
Go get em.
--Ryan
* Ryan Cole *
Programmer Analyst
www.iesco-dms.com
707-468-5400
;Fortuneately escape will cancel this endless loop...
Forever [ buy microsoft version: version + 1 ]
