array question (newbie)
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From: Jerry Cloe on 30 Aug 2005 23:49 Having an array: @mylist=("apples", "oranges", "bananas"); And refering to a particular element, which syntax is correct? (or are both correct)? print "Item 2 is $mylist[1]\n"; or print "Item 2 is @mylist[1]\n"; Both seem to work, and looking at other code, I see it done both ways.
From: Simon Taylor on 30 Aug 2005 23:58 Hello Jerry, : > Having an array: > > @mylist=("apples", "oranges", "bananas"); > > And refering to a particular element, which syntax is correct? (or are both > correct)? > > print "Item 2 is $mylist[1]\n"; > or > print "Item 2 is @mylist[1]\n"; > > Both seem to work, and looking at other code, I see it done both ways. The first is a scalar value, the second is an array slice. This is a frequently asked question. So you can use the "-q" option of the perldoc command to dig it up: Run: perldoc -q array and look for the section: "What is the difference between $array[1] and @array[1]?" Regards, Simon Taylor -- www.perlmeme.org
From: John W. Krahn on 31 Aug 2005 00:03 Jerry Cloe wrote: > Having an array: > > @mylist=("apples", "oranges", "bananas"); > > And refering to a particular element, which syntax is correct? (or are both > correct)? > > print "Item 2 is $mylist[1]\n"; > or > print "Item 2 is @mylist[1]\n"; > > Both seem to work, and looking at other code, I see it done both ways. Put the statement: use warnings; at the top of your program and perl will tell you which is correct. John -- use Perl; program fulfillment
From: A. Sinan Unur on 31 Aug 2005 00:04 "Jerry Cloe" <tom(a)staff.showmeisp.net> wrote in news:ZM9Re.19164$mb4.2853(a)tornado.rdc-kc.rr.com: > Having an array: > > @mylist=("apples", "oranges", "bananas"); Easier to type: my @mylist = qw(apples oranges bananas); > And refering to a particular element, which syntax is correct? (or > are both correct)? > > print "Item 2 is $mylist[1]\n"; This is correct. > or > print "Item 2 is @mylist[1]\n"; That is an array slice, probably not what you intended. > Both seem to work, You don't have warnings enabled. Have you read the posting guidelines for this group yet? Sinan -- A. Sinan Unur <1usa(a)llenroc.ude.invalid> (reverse each component and remove .invalid for email address) comp.lang.perl.misc guidelines on the WWW: http://mail.augustmail.com/~tadmc/clpmisc/clpmisc_guidelines.html
From: John Bokma on 31 Aug 2005 00:44
"A. Sinan Unur" <1usa(a)llenroc.ude.invalid> wrote: > You don't have warnings enabled. Have you read the posting guidelines > for this group yet? I was just wondering, if postings that don't follow the posting guidelines are just ignored, especially by the regulars *and* together with the FAQ xx.yy (or maybe instead of) a message is posted: Subject: Why is your message not answered? With a link to posting guidelines (and to the FAQ)? -- John Small Perl scripts: http://johnbokma.com/perl/ Perl programmer available: http://castleamber.com/ Happy Customers: http://castleamber.com/testimonials.html |