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

Ha! It was a case of misreading the sentence. All the same, thanks for the reminder. Now...the task of fixing my short-circuiting/error messages in other scripts awaits me. =]

Comment on Re^4: Cleaner way of looping through a file and stripping only certain lines?

Replies are listed 'Best First'.
Re^5: Cleaner way of looping through a file and stripping only certain lines? by ikegami (Patriarch) on Dec 08, 2006 at 19:10 UTC
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).	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^5: Cleaner way of looping through a file and stripping only certain lines?
by ikegami (Patriarch) on Dec 08, 2006 at 19:10 UTC

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).

[reply]
[d/l]
[select]