Perl Read Pdf File
I have a simple Perl script to read a file line by line. Code is below. I want to display two lines and break the loop. But it doesn't work. Where is the bug?
ЯegDwightReading and processing text files is one of the common tasks done by Perl. For example, often you encounter a CSV file (where CSV stand for Comma-separated values) and you need to extract some information from there. Here is an example with three solutions. Good, Better, Best. Errors reading PDF with CAM-PDF: use of uninitialized value in addition line 667 Hot Network Questions What does a Nintendo Game Boy do when turned on without a game cartridge inserted? The above way of handling files is used in Perl scripts when you absolutely have to have the file opened or there is no point in running your code. For example when the whole job of your script is to parse that file.
user5340095 Answers
Perl Read Line From File
If you had use strict turned on, you would have found out that $++foo doesn't make any sense.
Here's how to do it:
This takes advantage of the special variable $. which keeps track of the line number in the current file. (See perlvar)
If you want to use a counter instead, use
friedofriedoWith these types of complex programs, it's better to let Perl generate the Perl code for you:
Which will gladly tell you the answer,
Alternatively, you can simply run it as such from the command line,
Greg Baconyou need to use ++$counter, not$++counter, hence the reason it isn't working..
In bash foo is the name of the variable, and $ is an operator which means 'get the value of'.
In perl $foo is the name of the variable.