Question regarding a variable in code

[iowaprogrammer]

I am not real sure how to word my question, so bare with me. Trying to find information or get pointed to an article that explains what the difference between $debug and $debug. are? What the dot on the end of the variable does, if anything?

$mac=lc($mac);
$debug.=$mac;
$debug.=`./script.expect $mac`;

 

[KevinADC]

these are the same:

$foo = 'foo bar';
$foo = $foo . ' baz';

$foo = 'foo bar';
$foo .= ' baz';

".=" assigns and appends data to the end of an existing string. Other perl operators have similar shortcuts:

+=
*=
/=
||=

and I am sure there are more.




------------------------------------------
- Kevin, perl coder unexceptional!

 

[rharsh]

You can find more information in perldoc perlop under the Assignment Operators heading (which can also be found here.)

 

[iowaprogrammer]

Thanks so much for the information; exactly what I needed