TStrCollection.Compare
Compare two strings in the collection.
Declaration
Source position: objects.pp line 496
default
function Compare(Key1: Pointer; Key2: Pointer) : Sw_Integer; Virtual;
Description
TStrCollection overrides the Compare function so it compares the two keys as if they were pointers to strings. The compare is done case sensitive. It returns
- -1
- if the first string is alphabetically earlier than the second string.
- 0
- if the two strings are equal.
- 1
- if the first string is alphabetically later than the second string.
Errors
None.
See also
| Name | Description |
|---|---|
| TSortedCollection.Compare | Compare two items in the collection. |
Example
Program ex38;
{ Program to demonstrate the TStrCollection.Compare method }
Uses Objects,Strings;
Var C : PStrCollection;
S : String;
I : longint;
P : Pchar;
begin
Randomize;
C:=New(PStrCollection,Init(120,10));
C^.Duplicates:=True; { Duplicates allowed }
Writeln ('Inserting 100 records at random places.');
For I:=1 to 100 do
begin
Str(Random(100),S);
S:='String with value '+S;
P:=StrAlloc(Length(S)+1);
C^.Insert(StrPCopy(P,S));
end;
For I:=0 to 98 do
With C^ do
If Compare (At(I),At(I+1))=0 then
Writeln ('Duplicate string found at position ',I);
Dispose(C,Done);
end.