perl string split problem!

farhanali · 06-19-2003, 04:30 AM

hi all

i have a problem i have a string scalar that may be in the following form;

$mystring = "23+32";

now i want to split this up into two variables and perform addition on the two variable.
The problem is i cant split the variable with the folloing code
($one , $two) = split /'+'/ ,$mystring;

can someone help me please.

please forgive my ignorance as i am a complete newbie at perl.

thanks is advance.
Farhan Ali

jharris · 06-19-2003, 04:48 AM

Quote:

Originally posted by farhanali
($one , $two) = split /'+'/ ,$mystring;

Should be

Code:

($one , $two) = split /\+/ ,$mystring;

You need to delimit the + as currently your RegEx is matching "one or more" ' followed by a single '

HTH

Jamie...

acid_kewpie · 06-19-2003, 04:49 AM

Code:

$mystring=~/(\d+)\+(\d+)/;
print $1 + $2;

of course ytou don't need to do that att all, just eval() the string, and it will do the addition by itself.

farhanali · 06-19-2003, 02:19 PM

thanks man .... that eval() tip was really neat. i found out that not only does it evaluate arithmatic but also other perl functions and commands .... really neat

thanks once again...

Farhan Ali

Salz · 06-22-2003, 07:08 AM

Be careful with what you eval(), especially if it is user input. Or you might end up eval()ing a system "rm -rf /"