Hi All,
newbie-ish question here. I have this script:
For some reason, the $test variable doesn't seem to be carrying into the second "foreach" loop. Does anyone know why this is so? I suspect it might be an issue with the "$" character having a special meaning within REs. Please assist.
Edit/Delete Message
Can someone tell me what this is doing? I know it is reading records from a table and puts them in a hash. How do I print out, let's say, the first 5 columns of data (assuming columns are named col1, col2, ...)?
$sth = $dbh->prepare("select *
from stsc.loc
... (2 Replies)
hi,
im quite new to perl regexp. i have a problem where i want to extract a word from a given string. but the word is unknown, only fact is that it appears as the second word in the string.
Eg.
input string(s) :
char var1 = 'A';
int var2 = 10;
char *ptr;
and what i want to do is... (3 Replies)
Hi, this is my first post so here goes.....
I need help... I am trying to write a script to produce some stats based on a number of searches in a log file. Now i know how to do this using multiple variables which are really just greps, but I want a more efficent way of doing this as my poor... (1 Reply)
Hello everyone,
I am having to do a lot of perl scripting these days and I am learning a lot.
I have this problem
I want to move files from a folder and all its sub folders to one parent folder, they are all .gz files..
there is folder1\folder2\*.gz
and there are about 50 folders... (1 Reply)
Hi,
I am new to programming and also to perl..But i know 'perl' can come to my rescue, But I am stuck at many places and need help..any small help is much appreciated... below is the description of what i intend to acheive with my script.
I have a files named in this format... (13 Replies)
Hi,
So I started to learn perl a few days ago, and I have some problems...
One of my problems...
#!C:\Perl64\bin\perl.exe -w
use LWP::Simple;
print "Content-Type: Text/Plain\n\n";
sub pagelinks {
return @all = get($_) =~ /href\s*=\s*"?(+)/gis;
}
@a =... (5 Replies)
I have the following question in perl, I have come up with couple of solutions,Perl gurus please help me find the best answer to my question?
You have a PERL database named DataEntryData, and you need to separate out the various values from the DB entry $item, delimited by the ^ sumbol. There... (2 Replies)
Hi there
apologies for the really basic question but if i have a variable called $string that I want to run a regex against and output to another variable ...how do i do it, I know that if i wanted to alter the current $string variable i would do
$string=~ s/old/new/g;
but i kind of want... (2 Replies)
I am completely new to perl programming. My father is helping me learn said programming language. However, I am stuck on one of the assignments he has given me, and I can't find very much help with it via google, either because I have a tiny attention span, or because I can be very very dense.
... (4 Replies)
Discussion started by: kittyluva2
4 Replies
LEARN ABOUT OPENDARWIN
while
while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)