Char matching

[richmond62]

I've got badly stuck . . .

Let's suppose I have a field that contains the word "cheese"

and I want to replace the instances of 'e' with 'x'.

So I set up a button with the following sort of code:

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on mouseUp
     put "e" into BUKVA
     put "x" into BUKVA2
   put 1 into CHEQUE
   repeat until char CHEQUE of fld "fRWORD" is empty
      put char CHEQUE of fld "fRWORD" into VOX
      if BUKVA is VOX then
         replace (char CHEQUE of fld "fRWORD") with BUKVA2 in fld "fRWORD"
      end if
      add 1 to CHEQUE
   end repeat
end mouseUp

This does NOT work . . .

I suspect the problem may lie with

Code: Select all

if BUKVA is VOX

[jmburnod]

Hi Richmond,
Works nice with this:

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  put "e" into BUKVA
   put "x" into BUKVA2

instead this

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 put 'e' into BUKVA
put 'x' into BUKVA2

Kind regards
Jean-Marc

[Klaus]

Why not just:

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on mouseUp
     replace "e" with "x" in fld "fRWORD"
end museup

[richmond62]

Oddly enough, moved to another stack that seems to work.

[richmond62]

Why not just:

Because what I am trying to do is this:
-

-
the result is that "----------" gets replaced by a string of aaaa s.

[richmond62]

Thanks Jean Marc: I was SILLY using those single quotes,
but, as you can see, that was NOT enough.

[richmond62]

Aha: well I see what is wrong:

this:

Code: Select all

on mouseUp
   replace char 3 of fld "fRWORD2" with "X" in fld "fRWORD2"
end mouseUp

replaces ALL the characters in the field with "X" . . .

Which is NBG!

And seems to go against all the other TEXT manipulation stuff in LiveCode.

[dunbarx]

Richmond.

Cannot be true. Tested here, and only char 3 of the field gets the "X".

As it certainly ought to.

Craig

[richmond62]

Not "over here".

[bn]

Aha: well I see what is wrong:
this:

Code: Select all

on mouseUp
   replace char 3 of fld "fRWORD2" with "X" in fld "fRWORD2"
end mouseUp

replaces ALL the characters in the field with "X" . . .
Which is NBG!
And seems to go against all the other TEXT manipulation stuff in LiveCode.

It does exactly what you told LC to do:

from the dictionary:

replace in field
Type command
Syntax
replace oldString with newString in fieldContainer {preserving | replacing} styles

Your code:

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char 3 of fld "fRWORD2"

evaluates to "oldString" in your case "-" and replaces all occurences of "oldString" with "newString" in your case "X"

Kind regards
Bernd

[richmond62]

It does exactly what you told LC to do:

That's normally what computers do.

Gottit:

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on mouseUp
   put "a" into char 5 of fld "fRWORD2"
end mouseUp

[dunbarx]

Richmond.

I now see what you are talking about. I made my test with a handful of random characters, not a string of identical characters.

But in any reasonable body of text, you will surely get some repeats, and so the direct "put someChar into" is the way to go.

Craig

[richmond62]

Have a look at my "Hangman 4" stack over here:

viewtopic.php?f=25&t=36434&start=15

and see what happens.