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oib111
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 Posted: Sat Jul 21, 2007 1:20 pm Post subject: Can you convet TStrings to Strings in delphi? |
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Well, I was going to make an encryptor, but I don't know anything that can search and or replace a TString. So is there an function like that, or is there a way to convert TStrings to Strings.
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appalsap
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| Posted: Sat Jul 21, 2007 1:49 pm Post subject: |
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| explain what a TString is |
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oib111
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| Posted: Sat Jul 21, 2007 2:50 pm Post subject: |
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Well, when you make an edit box, the text is considered a string, if you make like a MemoBox or a richedit it has lines, and they are considered TStrings. Thats why if you did :
| Code: |
if AnsiPos('Cat', Memo1) <>0 then
Memo1.Lines := StringReplace(Memo1.Lines, 'Cat', 'c',
[rfReplaceAll, rfIgnoreCase]);
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it wouldn't work because both of them are used for Strings and not TStrings. But I want to use them for my encryptor, just I can't figure out how to fix the problem, so I'm asking if I can convert TStrings into strings, or if there are two functions like AnsiPos and StringReplace used for TStrings.
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XTrinityX
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| Posted: Sat Jul 21, 2007 9:18 pm Post subject: |
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Well, Memo1.Lines is actually an array of strings (TStrings), as you say.
You are correct that your code cannot be used because Memo1.Lines is an array of strings, while all of your functions just affect one string. You can fix this with a simple loop to loop through all the strings in Memo1.Lines and do what you want. Sample code is below.
First add i as an integer...
| Code: | var
i : integer;
end;
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| Code: | for i := 0 to (memo1.lines.count - 1) do
begin
//Do what you want here...In this case we just replace all 'cat' with 'c.'
Memo1.Lines[i] := StringReplace(Memo1.Lines[i], 'Cat', 'c',
[rfReplaceAll, rfIgnoreCase]);
end;
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oib111
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| Posted: Sat Jul 21, 2007 10:45 pm Post subject: |
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thx, but i dont want to be spoon fed, so can you explain the code?
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appalsap
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| Posted: Sat Jul 21, 2007 10:48 pm Post subject: |
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| if you don't understand simple concepts like loops and arrays you should probably re-learn delphi. or learn another language that ISN'T object oriented and DOESN'T let you jump right into GUI programming without knowing anything. |
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oib111
I post too much
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| Posted: Sat Jul 21, 2007 10:50 pm Post subject: |
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Well appalsap, I'm not a very good delphi programmer, and I am just learning delphi, so right now, I won't know that much and will not know so much. So if you would kindly explain the code, it would be very nice of you.
Edit:
Screw that, I never learned the Memo1.Lines[i] thing. I mean, I don't get it, it was never taugh to me. I could understandl ike Memo1.Lines[0] but [i] I don't get. The other thing that I have no idea is hte Memo1.Lines.count - 1. What is that? Just explain please or give some link to a website that explains it.
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cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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UnLmtD
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| Posted: Sun Jul 22, 2007 2:39 am Post subject: |
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From my limited Delphi knowledge I would assume in this code:
| Code: | for i := 0 to (memo1.lines.count - 1) do
begin
//Do what you want here...In this case we just replace all 'cat' with 'c.'
Memo1.Lines[i] := StringReplace(Memo1.Lines[i], 'Cat', 'c',
[rfReplaceAll, rfIgnoreCase]);
end; |
Memo1.Lines holds the string that you got from your MemoBox.
(memo1.lines.count - 1) Counts how many elements/slots are in the array. It does the -1 probably because if you declare an array this way:
It does't hold 100 elements, but 99. Because the first character of the string will be at position 0, the second character at position 1
An array looks like this [][][][][][] Thats why we added the [i] to Memo1.Lines so it can loop through each of those "boxes" and then use the StringReplace function to replace Cat with c http://delphi.about.com/library/rtl/blrtlStringReplace.htm
If by any chance you know C, here a complete tutorial: http://www.cprogramming.com/tutorial/c/lesson8.html
Yeah well it's 5AM here and probably its bad explained, you should just go read some array and loop tutorials.
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Simsgy
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| Posted: Sun Jul 22, 2007 4:41 am Post subject: |
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Well you can always use Memo1.Lines.Text to see it as String instead of TStrings, thats what I use.
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oib111
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| Posted: Sun Jul 22, 2007 9:03 am Post subject: |
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Thank you UnLmtD for explaing, thank you simsgy for a much shorter way.
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Flyte
Peanuts!!!!
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| Posted: Sun Jul 22, 2007 9:32 am Post subject: |
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| UnLmtD wrote: |
It does't hold 100 elements, but 99. Because the first character of the string will be at position 0, the second character at position 1. |
I really would like to know how inebriated you are a 5 in the morning. If you declare an array to have 100 elements (because when you declare an array it starts at 1 not 0), it has 100 elements, you just loop through them from 0-99.
I am scared to see you programming drivers.
P.S. Any special reason you changed your name? |
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UnLmtD
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| Posted: Sun Jul 22, 2007 9:53 am Post subject: |
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Hey Flyte
| Quote: | | (because when you declare an array it starts at 1 not 0) |
Well, doesn't seem to be working this way, the first character of the string will be at position 0
| Quote: | | P.S. Any special reason you changed your name? |
No, it's just that I didn't like the other one. And Dark Byte was kind enough to change it.
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Flyte
Peanuts!!!!
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| Posted: Sun Jul 22, 2007 2:54 pm Post subject: |
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| UnLmtD wrote: | | Well, doesn't seem to be working this way, the first character of the string will be at position 0 |
Yes, when you refrence it in code, but when you are creating the array it starts at 1.
char array[0];
0, not 1, elements of char. (Impossible, defining nothing)
char array[1]; (redundant)
1 element.
char array[2];
2 elements.
Now look at the array[2], there isn't 3 elements there (0,1,2) there is 2 because it starts counting at 1. But when you use this in the code you call it like 0,1 because it starts counting at 0.
| UnLmtD wrote: |
No, it's just that I didn't like the other one. And Dark Byte was kind enough to change it. |
I think I am going to keep calling you zomgiownyou just to bug you.  |
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UnLmtD
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| Posted: Sun Jul 22, 2007 3:05 pm Post subject: |
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You were right sorry  Thanks for explaining 
| Flyte wrote: |
I think I am going to keep calling you zomgiownyou just to bug you. |
I got to stop making stupid usernames, I wasn't planning to post a lot in here. =\
Offtopic: Not sleeping this night was a mistake.
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oib111
I post too much
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| Posted: Sun Jul 22, 2007 5:18 pm Post subject: |
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lol, i like zomgiownyou way better than UnLmtD
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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