Remove last character from a string.

[Elmug]

I wonder how the new book on Lazarus (in English) relates to this.

I think it'd help if the List of Contents were in the web, and maybe a few sample pages.

[Zoran]

I wonder how the new book on Lazarus (in English) relates to this.

I think it'd help if the List of Contents were in the web, and maybe a few sample pages.

http://www.blaisepascal.eu/lazarus/ContentPage5_10.pdf

[Elmug]

SetLength(Edit1.Text, Length(Edit1.Text) - 1);

Hi dear forum people,

I tried this:
SetLength(FormX.TextEntry.Text, Length(FormX.TextEntry.Text) - 1);

And I get error as follows:
UnitX.pas(166,36) Error: Can't take the address of constant expressions

I searched and found that Properties can not be passed by reference. So I suppose I have to set a var to have the value, and so forth. Am I supposing right, or is there a better way?

Also, I suspect that some functions can not use the properties directly, so I'd be aware of this?

But more than not, I suspect I may be misguiding myself, and hope a sentence or two from you good people, can provide some fundamental grasp.

Thanks.

[Leledumbo]

I searched and found that Properties can not be passed by reference. So I suppose I have to set a var to have the value, and so forth. Am I supposing right, or is there a better way?

Yep, you're right

[Elmug]

Thanks LeleDumbo.

[Martin_fr]

Code: Pascal  [Select][+][-]

1. MiString := Copy (Edit1.Text,0,(length(Edit1.text)-1));
2.  

Will not work always. Because Edit.Text is UTF8.

This removes the last BYTE from the string, but a utf8 char be multiply bytes.

Lazarus has somewhere (not sure which unit) CopyUtf8, etc => but be aware, that they are significantly slower.

[Elmug]

Code: Pascal  [Select][+][-]

1. MiString := Copy (Edit1.Text,0,(length(Edit1.text)-1));
2.  

Will not work always. Because Edit.Text is UTF8.

This removes the last BYTE from the string, but a utf8 char be multiply bytes.

Lazarus has somewhere (not sure which unit) CopyUtf8, etc => but be aware, that they are significantly slower.

Good warning, Martin.

It's an important one, and will be kept in mind.