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

by texasperl (Sexton)
on Dec 08, 2006 at 18:20 UTC ( #588666=note: print w/ replies, xml ) Need Help??


in reply to Re^3: 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?

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?
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

    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).

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