[Lazarus] Compare record

J├╝rgen Hestermann juergen.hestermann at gmx.de
Wed Mar 11 07:22:25 CET 2015


Am 2015-03-10 um 22:23 schrieb aradeonas:
 > How can I compare two record?
 > Like this :
 >     type
 >     TRec=record
 >     na:string;
 >     end;
 >
 >     var
 >     R1,R2:TRec;
 >     Begin
 >     R1.na:='A';
 >     R2.na:='B';
 >
 >     if R1<>R2 then
 >     Showmessage('Error')

In your example you would not need the record
if it consists of only one string component.
But you can write:

if R1.na<>R2.na then
    Showmessage('Error')

In general there cannot be a standard
compare function for records because
you can have a lot of different types
within a record. So you need to write
your own compare function.




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