Re: Quick question: (...) vs [...]
On Fri, Aug 08, 2008 at 11:08:51PM -0400, Brandon S. Allbery KF8NH wrote: > > On 2008 Aug 8, at 22:53, John M. Dlugosz wrote: > >> What is the difference between (1,2,3) and [1,2,3] ? > > IIRC one is a list, the other a reference to a list --- which in perl6 > will be hidden for the most part. so practically speaking the difference > is minimal. More directly, (1,2,3) will interpolate in list context, while [1,2,3] will not. say (1, 2, (3, 4, 5)).elems # 5 say (1, 2, [3, 4, 5]).elems # 3 The first example has a List containing five Ints, the second example has a List containing two Ints and an Array. It's also useful to consider the difference between: $x = (3); # $x becomes an Int $x = [3]; # $x becomes an Array Pm
Re: Quick question: (...) vs [...]
On Sat, Aug 9, 2008 at 7:01 AM, Audrey Tang <[EMAIL PROTECTED]> wrote: > One is a List and one is an Array; you cannot push into a list, but you can > into an array. > > my @a := (1,2,3); > my @b := [1,2,3]; > > @a.push(4); # fails > @b.push(4); # works But note that the first push fails because the symbol @a was *bound* to the list. After an ordinary assignment my @a = (1,2,3); @a is still an array, which just happens to have been initialized from a list. @a.push(4); # succeeds -- Mark J. Reed <[EMAIL PROTECTED]>
Re: Quick question: (...) vs [...]
John M. Dlugosz 提到: What is the difference between (1,2,3) and [1,2,3] ? One is a List and one is an Array; you cannot push into a list, but you can into an array. my @a := (1,2,3); my @b := [1,2,3]; @a.push(4); # fails @b.push(4); # works Cheers, Audrey
Re: Quick question: (...) vs [...]
On 2008 Aug 8, at 22:53, John M. Dlugosz wrote: What is the difference between (1,2,3) and [1,2,3] ? IIRC one is a list, the other a reference to a list --- which in perl6 will be hidden for the most part. so practically speaking the difference is minimal. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH
Quick question: (...) vs [...]
What is the difference between (1,2,3) and [1,2,3] ? --John
