Hello Phil N,
Thanks for the explanation. The collection I'm dealing with is actually
small with the remote possibility that it might be large. The reason I asked
was due to some C# literature I read comparing the 'for' with the 'foreach'
loop statements. The loops cycled through objects expressed as an object
array in the 'for' case then object enumeration using 'foreach'. The
conclusions being that when looping through objects its' best to use
foreach, then I heard otherwise which is my main reason for asking. I didn't
really think it was size (number of objects) based until now. Thank you very
much for that.
Regards,
SpotNet.
"Phil N" <Ph***@discussions.microsoft.com> wrote in message
news:A9**********************************@microsof t.com...
: It depends on your application, and there's a bit of a catch 22 here.
: Enumerating over the collection (using foreach) introduces heap and
virtual
: function overhead that isn't present with the linear search (using for),
so
: for will reduce the application's resource consumption as the size of the
: collection increases. The catch: a linear search really begins to waste
: processor cycles on large collections anyway. Think here of how much is
: wasted by using a linear search to find "Zebra" in an unabridged
dictionary,
: for example.
:
: If your collection might get really large, reply and say so, and I'll give
: you some tips on improving the performance.
:
: "SpotNet" wrote:
:
: >
: > Hello Phil N, Jon,
: >
: > Thanks for the response and good advice. I didn't articulate myself all
that
: > well, primarily I wanted (obviously) to have a string parameter indexer
as
: > well as an integer one. I discovered the hard way what I posted didn't
work,
: > I wanted to know if a string parameter indexer was possible using the
: > CollectionBase parent or base.
: >
: > I've implemented your solutions (works well indeed thanks) and wanted to
ask
: > in this situation, which would be better to use;
: >
: > for (int idx = 0; idx < mycollection.Count; i++) {if
: > (this[i].DataMemeber1.Equals(paramString) {...; break;}} Or,
: > foreach(MyClass mc in this) {if (mc.DataMember1.Equals(paramString)
{...;
: > break;}}....
: >
: > Thanks again...
: >
: > Regards,
: > SpotNet.
: > "SpotNet" <Sp*****@msnews.grp> wrote in message
: > news:e0****************@TK2MSFTNGP10.phx.gbl...
: > :
: > : Hello NewsGroup,
: > :
: > : I have a custom class and a collection for that custom class that
inherits
: > : CollectionBase. As such;
: > :
: > : public class MyClass
: > : {
: > : private string datamember1 = string.Empty, datamember2 =
string.Empty;
: > : private int datamember3 = -1;
: > :
: > : public MyClass(string dataMember1) {this.datamember1 =
dataMember1;}
: > :
: > : public void AGreatFunction() {//The usual stuff}
: > :
: > : public bool TrueOrFalse(string argument) {return false;}
: > :
: > : public string DataMember1
: > : {get {return this.datamember1;}
: > : }//public class MyClass
: > :
: > : public class MyClassCollection: CollectionBase
: > : {
: > : public MyClass this[int index] //How well this works
: > : {
: > : set {this.List[index] = value;}
: > : get {return (MyClass) this.List[Index];}
: > : }
: > :
: > : public MyClass this[string classKey] //This doesn't work
: > : {
: > : set {this.List[this.List.IndexOf(classKey)] = value;}
: > : get {return (MyClass) this.List[this.List.IndexOf(classKey)];}
: > : }
: > : }//public class MyClassCollection: CollectionBase
: > :
: > : This string indexer doesn't work as 'this.List.IndexOf(classKey)'
always
: > : returns -1. Can someone tell me please what I must consider to get a
: > string
: > : indexer working for this situation? Many thanks news group.
: > :
: > : Regards,
: > : SpotNet.
: > :
: > :
: >
: >
: >
