Pavel Minayev wrote:

> "Russ Lewis" <spamhole-2001-07-16@deming-os.org> wrote in message news:3C75179F.EF2FE1BF@deming-os.org...
>
> > Is the result of strcmp() defined or implementation dependent?  If the
> > former, then strcmp()'s comparison algorithm would work fine for me....
>
> Don't forget that D associative arrays don't necessary have string keys. It's perfectly valid to have an int, float, or even Object as a key.

Great!  But I didn't know that...and I don't see it in the online docs.  The closest I see is a statement that "Associated arrays are supported for all following types", which is hard to understand, but I guessed meant "you can have an associative array (keyed by strings) of any type".

> Also, any "comparison algorithm" sorta limits the implementation - it either has to store the keys in that order in memory, or the iteration process will be quite slow (because a look-up is performed for each key in the table). How do you implement an ordered scan for a hash table, for example?

Right.  It would be nice to be able to slice these arrays with compiler support in the language.  I don't really care the underlying algorithm; I was just hoping that I could have access to the easy functionality.  However if more than strings are supported, then it gets hard.

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"Russ Lewis" <spamhole-2001-07-16@deming-os.org> wrote in message news:3C753CF5.D4313464@deming-os.org...

> Great!  But I didn't know that...and I don't see it in the online docs.
The
> closest I see is a statement that "Associated arrays are supported for all following types", which is hard to understand, but I guessed meant "you
can
> have an associative array (keyed by strings) of any type".

Just remember the syntax:

    int[char[]] foo;       // keys are char[]
    char[][double] bar;    // keys are double
    Object[Object] baz;    // keys are Object

The only thing is that currently DMD alpha only supports int[char[]] =)
I guess this also includes pointers since they're 32-bit as well
(or am I wrong, Walter?).

"Karl Bochert" <kbochert@ix.netcom.com> wrote in message news:1105_1014316952@bose...
> > I believe there's no such thing as "rectangular slice" in D. start[1..4] is an array of 3 elements of type int[5].
>
>  Is that the second through fourth elements of start?
>  Or the first through third?

Second through fourth (counting from 1).

> Neither  seems to be what [1..4] is saying!
> [1..4] clearly shows either a 1 and a 4  or  a 'first' and a 'fourth'
> inside the brackets (array).

C (and D) arrays are zero-based, you know =)
So the element isn't actually 'first', but 'zeroth'.