On: Perl 6 Optimism

[amyjess]

Only if you're using a list, not a dict. I just tried it in the REPL:

    >>> foo = {}
    >>> foo[3] = 72
    >>> foo[64] = 80
    >>> foo
    {3: 72, 64: 80}

[arunix → amyjess]

The difference is more dramatic once you have two or more dimensions:

    >>> foo = {}
    >>> foo[3][4] = 42
    Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    KeyError: 3

Compared to:

      DB<1> $foo{3}{4} = 42

      DB<2> x \%foo
    0  HASH(0x7f9f4315c940)
       3 => HASH(0x7f9f432bb148)
          4 => 42

[pseudalopex → arunix]

    tree = lambda: collections.defaultdict(tree)
    foo = tree()
    foo[3][4] = 42