I am new to this site and I have a question (sorry about it eating the <CR><LF>, dont know how to fix). I want to write a perl script that gets a list of regular expressions from a file. Example:
myscript.pl regexp.txt ascii.txt
I know how to write the script with regexp.txt hard coded into myscript.pl. I want to allow the user to specify this at runtime.
Below is an example of where I have hardcoded the regexp in the script so you can gauge perl ability.
#!/usr/local/bin/perl
open (FILE1, "$ARGV[1]") || warn "The script $0 can't open $ARGV[1]: $
+!\n";
open (FILE1, "$ARGV[0]") || warn "The script $0 can't open $ARGV[0]: $
+!\n";
while (<FILE1>){
s/f/z/;
s/h/y/;
s/there/where/;
print $_;
}
close (FILE1);
Thanks
Ascii.txt would look like this:
foo
bar
here
there
Then regexp.txt would be like this:
s/f/z/;
s/h/y/;
s/there/where/;
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.