Solved

convert read data to variable

Posted on 2002-05-06
4
140 Views
Last Modified: 2010-03-05
I have a text file called file1.txt. I want to be able to read in a line of that file (let's say the line is "score=2"). I now want to be able to use that as a variable and value in my current program.

In other words, I now want to have a variable called "$score" in my current program and have it's value set to "2" based on the data I read in from the text file.

I don't know what I will be reading in from the text file but I do know that it will always be [variable]=[value] so I can't predetermine the variable name because I don't know what it will be until I read it from the text file.

Is this possible? and if so how do I do it?

Thanks.
0
Comment
Question by:johnsm
  • 2
  • 2
4 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 6992136
/(\w+)=(.*)/;
$$1 = $2;
0
 
LVL 1

Author Comment

by:johnsm
ID: 6992146
What exactly does that do? I can't seem to use it properly, it just halts my execution with no errors.

How would it fit in here?
<pre>

while ($data=<DATAFILE>) {
  /(\w+)=(.*)/;
  $$1 = $2;
}
</pre>

{sorry if the tags show up.}





0
 
LVL 84

Accepted Solution

by:
ozo earned 200 total points
ID: 6992236
while( $data=<DATAFILE> ){
    $data =~ /(\w+)=(.*)/;
    $$1 = $2;
}
0
 
LVL 1

Author Comment

by:johnsm
ID: 6992245
ah, I see. I'm not sure how or why it works, but it does, thanks.

0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Perl Sort Question 4 141
Using Perl DBI to query oracle 3 46
To run CGI/perl on tomcat and connect to oracle database. 5 136
Perl script to delete older files 6 88
I've just discovered very important differences between Windows an Unix formats in Perl,at least 5.xx.. MOST IMPORTANT: Use Unix file format while saving Your script. otherwise it will have ^M s or smth likely weird in the EOL, Then DO NOT use m…
There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question