Re: split()'s regex pattern parameter

Jerry Adair schreef:

when attempting to call split() with a value to "split on" that is
stored in a scalar, I get behavior other than what I expected. The
Camel book says to just put it inside match delimiters, but that
doesn't help the cause. Thus:

@line = split( /$separator/ );

Where are the examples of the value of $separator?


doesn't do what I thought it would, as if $separator was replaced
with:

@line = split( " " );

The problem I am encountering is when I try to access the list
produced by the split (with the scalar), the first list value is
null.

Does the PATTERN contain parentheses? See perldoc -f split.


Also: <quote> A "split" on "/\s+/" is
like a "split(' ')" except that any leading whitespace produces
a null first field. A "split" with no arguments really does a
"split(' ', $_)" internally. </quote>


However, with the simple string example (I know that split
will parse a string as a pattern even when not given as a pattern) I
get the correct results, which is a non-null list (for a given
non-null line of data).

If your PATTERN is a single space, then you have a special case.


I don't know why this pattern won't work in regex parser, I was
surprised. I'm probably missing something simple, but I thought I'd
ask anyway.

Did you try $separator = qr/PATTERN/ ?

--
Affijn, Ruud

"Gewoon is een tijger."
.

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