> From: Jenda Krynicky [mailto:[EMAIL PROTECTED]
> Sent: Saturday, 21 February 2004 10:01 AM
> To: Perl Beginners
> Subject: Re: list of strings to array
>
> From: Jacob Chapa <[EMAIL PROTECTED]>
> > Is there any way to split up a string and put it into an array....
> >
> > something like this:
> >
> > if I had a string:
> >
> > one two three four
> >
> > or
> >
> > one;two;three;four
> >
> > Can I put "one" into the first element, "two" into the
> second, etc...
> > knowing what splits up the string. For instance, in the first one a
> > space " " separates it and in the second a semicolon ";"
> separates the
> > elements.
>
> Guess what ...
>
> @array = split / /, "one two three four";
> @array2 = split /;/, "one;two;three;four";
>
Just a note.
@array = split / /, "one two three four";
and
@array = split " ", "one two three four";
are not the same. The second is special-cased inside perl to do the
same as the AWK split command. The first is just a normal regular
expression matching exactly one space.
Hence
if
$a=" one two three four "; (note the leading and extra spaces)
after
@array = split / /, $a
@array will contain ( undef, 'one', 'two', undef, 'three', 'four', undef
)
ie, seven (7) elements from a string with six (6) separators.
while after
@array = split " ", $a
@array will contain ( 'one', 'two', 'three', 'four' )
which is more intuitive.
Cheers.
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