Please update Collection example in README.md about mql4-lib

[dingmaotu]

@janckerchen Thank you for the feedback. Doc has been updated.

The Iter class had been deprecated for a while, as I found a new trick to implement a foreach macro. Do check out the foreach macro, it works just as you wanted.

It is generally not recommended to do insertion while in iteration. The iterator will be invalidated due to size change. A temporary solution might be:

Vector<int> idx;
int i=-1;
foreach(T, list)
{
++i;
T e = it.current();
if(e match condition) idx.push(i+idx.size()); // note that index will change after previous insertions
}
foreach(int,idx) list.insert(it.current(), new T);

I know this is verbose but this is currently the only safe way to do what you want.
I have plans to make iterator support element removal and insertion. As we are in rapid development of a complex product (which uses this library), the collection code will see constant improvements. Any feedback is welcome.

[janckerchen]

I just found a insert() method in LinkedList, but the params type is different from your example, further more it is under protected limit, cant access by list.insert().

protected:
   void              insert(LinkedNode<T>*ref,LinkedNode<T>*node);

[dingmaotu]

Use public insert of ArrayList. You use insertion position by index, not by element reference.

[janckerchen]

foreach is a macro, as your code style, I think it should be UPPER_CASE.

If I just wanna find something then break in iteration, SafeDelete(it) at the end of loop, as your foreach macro defined, have no chance to be executed then memory leak show up.

[dingmaotu]

Normally macros should be upper case, but I want foreach to be a language construct just like a keyword.

Yes, the foreach macro can not handle exceptional control flow where it pointer has no chance to be deleted. Afraid that Iter class has to be bring back 😜 . This bug will be fixed soon. Thanks for the bug report . You can open new issues for easier tracking.

[janckerchen]

ok, I will open new issue, thanks to your effort.