12-04-2012
Question on TCL regexp and match
Hello everyone,
I'm new in tcl scripting.
I'm currently studying a tcl script and came across this line:
regexp {(\d+)(\S?)} $opts match opt swi
According to my understanding, this line means to search in the opts variable for one or more digit, followed by a non-whitespace character (if the non-whitespace character exists). The matched pattern will then copied into the opt variable.
Is my understanding is correct?
How about the swi? What does it do?
Please help. Thanks
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LEARN ABOUT SUSE
web2disk
WEB2DISK(1) calibre WEB2DISK(1)
NAME
web2disk - part of calibre
SYNOPSIS
web2disk URL
DESCRIPTION
Where URL is for example http://google.com
Whenever you pass arguments to web2disk that have spaces in them, enclose the arguments in quotation marks.
OPTIONS
--version
show program's version number and exit
-h, --help
show this help message and exit
-d, --base-dir
Base directory into which URL is saved. Default is .
-t, --timeout
Timeout in seconds to wait for a response from the server. Default: 10.0 s
-r, --max-recursions
Maximum number of levels to recurse i.e. depth of links to follow. Default 1
-n, --max-files
The maximum number of files to download. This only applies to files from <a href> tags. Default is 9223372036854775807
--delay
Minimum interval in seconds between consecutive fetches. Default is 0 s
--encoding
The character encoding for the websites you are trying to download. The default is to try and guess the encoding.
--match-regexp
Only links that match this regular expression will be followed. This option can be specified multiple times, in which case as long
as a link matches any one regexp, it will be followed. By default all links are followed.
--filter-regexp
Any link that matches this regular expression will be ignored. This option can be specified multiple times, in which case as long as
any regexp matches a link, it will be ignored.By default, no links are ignored. If both --filter-regexp and --match-regexp are spec-
ified, then --filter-regexp is applied first.
--dont-download-stylesheets
Do not download CSS stylesheets.
--verbose
Show detailed output information. Useful for debugging
SEE ALSO
The User Manual is available at http://calibre-ebook.com/user_manual
Created by Kovid Goyal <kovid@kovidgoyal.net>
web2disk (calibre 0.6.53) July 2010 WEB2DISK(1)