Simultaneous Input/Output from a file?

[robbaggio]

Is it possible to read in a line of data from a file, change the data, and then write it back to the file. Then go on to the next line and do the same, etc. Can this be done without opening up the existing file, reading from it, making the changes, and then writing it to another blank file?

If it is what command do i use to open up the file.

Open FILE For [Input | Output | Append] As 5

Input or Output?

thanks for any help
robbaggio

 

[sunaj]

Yes. Open the file for binary.
However when you go back and forth in the file writting data you'll overwrite what is in that position already.
So for cahnges that have the same length as the original data it's great, but if the lenght differs it often pays off to load everything into a string (or byte array), maniputlate it, and then output everything agian to a "new" file.
See also thread222-314712 Sunaj
'The gap between theory and practice is not as wide in theory as it is in practice'