Re: Quick question: (...) vs [...]

["Patrick R. Michaud" <pmichaud@pobox.com>]

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