Re^2: Cleaner way of looping through a file and stripping only certain lines?

in reply to Re: 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?

This is some great insight. I especially gleaned a lot of wisdom from these bits:

not using "" around the variable in open
operator precedence in the open statement
using STDIN and STDOUT instead of named filehandles

Thank you very much for your excellent insight. Hopefully someone else can also learn from this post (that's why I post things like this.)

Comment on Re^2: Cleaner way of looping through a file and stripping only certain lines?

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Re^3: Cleaner way of looping through a file and stripping only certain lines? by revdiablo (Prior) on Dec 08, 2006 at 18:17 UTC
operator precedence in the open statement Not trying to kick you while you're down (honestly! =]), and it could just be a case of me misreading your sentence, but the operator precedence ikegami explained is not limited to the open statement -- it's part of the perl parser in general. Update: Ah, misread the original sentence indeed. Sorry 'bout that. No harm intended.	[reply]
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
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. =]	[reply]
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]

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