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Author Topic: SetLength and Length  (Read 6103 times)

mikiwoz

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SetLength and Length
« on: February 27, 2005, 02:18:45 pm »
Hello
I seem to have a strange problem here:

procedure Something(var FirstArray:array of string);
var SecondArray:array of string;
begin
    SetLength(SecondArray, 1);
    SecondArray[0]:='SomeString';
    FirstArray:=SecondArray; <- ERROR HERE "The operator is not aplicable to operand type"
end;

WTF? Both arrays are of the same type.
I tried SetLength(FirstArray, 1);, but got "Type mismatch" error. Am I missing something?

TIA
Mike

matthijs

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SetLength and Length
« Reply #1 on: February 27, 2005, 02:59:45 pm »
FirstArray is an array of string. SecondArray however is another array of string. What may help is:
Code: [Select]

type
  TMyArrayOfString = Array of string;

procedure Something(var FirstArray, SecondArray: TMyArrayOfString);
begin
  ....

Now they are both the same. :)
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Lightning

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  • Posts: 422
SetLength and Length
« Reply #2 on: March 18, 2005, 12:20:06 pm »
Yes when you define complex types you have to use define another type to make them compattible.
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