Make ArrayList in Unmanaged C++

[res7cxbi]

I like to implement and ArrayList like Java's and C# in C++
but I have no clue how to start
I really don't want to use Managed C++ and use ArrayList that way - I
want to keep it "unmanaged"

Can anyone point me to a resource that can tell me how to do this?

Thanks in advance

[Luke Meyers]

res7c...@verizo n.net wrote:

I like to implement and ArrayList like Java's and C# in C++
but I have no clue how to start
Well, the C++ standard library defines several different collection
class templates which are adequate for most purposes -- did you learn
about these before deciding that you have to implement your own? The
closest analogue to ArrayList is probably std::vector, because it's a
collection class implemented in terms of a contiguous block of memory
(an array).
I really don't want to use Managed C++ and use ArrayList that way - I
want to keep it "unmanaged"
You'll find that the culture of this group is fairly unsympathetic (at
times openly hostile) to nonstandard extensions such as Managed C++; as
such, most of us won't work very hard to decipher lingo specific to
such extensions. Do managed/unmanaged refer to, perhaps, garbage
collection or the lack thereof? C++ does not have garbage collection
(though of course it's possible to implement a GC system in C++), so I
guess that satisfies your desire to keep things "unmanaged. "
Can anyone point me to a resource that can tell me how to do this?

Read up on the STL first, before deciding to roll your own. It's not
just a matter of reinventing the wheel -- proper use of at least the
basic STL containers is a fundamental C++ skill. Learning about them
is something every C++ programmer should do long before achieving the
necessary skill level to implement something analogous on his or her
own.

Get yourself a copy of Stroustrup's _The C++ Programming Language_.
For an online STL reference, see sgi.com/tech/stl (though beware of
their nonstandard extensions).

Luke

[res7cxbi]

oh i didn't know STL had container classes - how cool - they even have
Iterators - perfect!
std::vector seems promising, but i'd like to remove objects based on
object search, not by index number
like ArrayList.remov e(Object o) instead of ArrayList.remov e(int index)
maybe i should just make a function that searches the vector and use
std::vector::er ase() to get rid of it

is access to the ArrayList fast? i need to loop through the entire
vector to perform operations on them constantly (maybe use Iterators?)

also can there be a vector of pointers? all the examples i've seen use
non-pointers

[res7cxbi]

Oh, and also are there any guidelines/requirements for the objects
being inserted into the vector?

Thanks for a quick reply!

[Luke Meyers]

re******@verizo n.net wrote:

oh i didn't know STL had container classes - how cool - they even have
Iterators - perfect!
I'm gratified you think so.
std::vector seems promising, but i'd like to remove objects based on
object search, not by index number
You can do that. Keep reading.
like ArrayList.remov e(Object o) instead of ArrayList.remov e(int index)
maybe i should just make a function that searches the vector and use
std::vector::er ase() to get rid of it
First, learn whether such a function already exists (hint: yes). Be
aware of the performance cost associated with removing from the middle
of a vector, though. std::list and std::deque might be worth
considering instead, if you need to do a lot of that kind of thing.
is access to the ArrayList fast?
You mean the vector? Sure, it's fast.
i need to loop through the entire
vector to perform operations on them constantly (maybe use Iterators?)
Yes, use iterators.
also can there be a vector of pointers? all the examples i've seen use
non-pointers

Yes.

Your enthusiasm is great, but you're asking pretty basic questions that
are more readily answered by simply doing some reading. Usenet is for
when you can't find the answer on your own.

Luke

[Luke Meyers]

res7c...@verizo n.net wrote:

Oh, and also are there any guidelines/requirements for the objects
being inserted into the vector?
Yes, there are. They must have value semantics. Google for more.
Also, see the FAQ at http://www.parashift.com/c++-faq-lite/.
Thanks for a quick reply!

You're welcome. Please buy a book, though, or get one from your local
library. You'll relish the decision to do so, in the long term.

Luke