Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re^5: Cleaner way of looping through a file and stripping only certain lines?

by ikegami (Pope)
on Dec 08, 2006 at 19:10 UTC ( #588674=note: print w/ replies, xml ) Need Help??


in reply to Re^4: Cleaner way of looping through a file and stripping only certain lines?
in thread Cleaner way of looping through a file and stripping only certain lines?

Similarly, not using "" around the variables is not specific to open. "$var" creates a new variable which is the string representation of the specified variable. It's almost never needed, and it's often undesireable.

In this case, your variable is already a string, and if it wasn't. If it wasn't, it would get converted to a string automatically.

I can think of two uses for "$var":

  • When using a global variable as an argument. (For example, log_error("$@") is safer than log_error($@).)

  • When you want to explicitely specifiy the context for an overloaded object. (For example, 4 + $obj and 4 + "$obj" could have different results.) You'd only use this when you know you have an overloaded object and you know you want the string representation in a numerical, boolean or list context (i.e. never).


Comment on Re^5: Cleaner way of looping through a file and stripping only certain lines?
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://588674]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others imbibing at the Monastery: (13)
As of 2014-10-24 17:22 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    For retirement, I am banking on:










    Results (134 votes), past polls