Hello!

How can I write an array into a file (and what type of appropriate file? csv perhaps?),…
…and then read back the file records into that array?

mandarin said

Hello!

How can I write an array into a file (and what type of appropriate file? csv perhaps?),…
…and then read back the file records into that array?

An array of what?

Maybe use Setting.class

Dim aStrings as String[] = ["hi", "halo", "ola"]

File.Save(sMyFileName, Settings.ToString(aStrings))

or use your programs settings

Settings["MySavedArray"] = aStrings

Actually, I wrote successfully a single-dimensional array into a (text) file, like this:

Indeed, this code wrote a 36-lines text file with the word "False" on each line; where later I changed (using Linux Mint Text Editor) some lines to "True", just to check if I can read them back to MyOwnArray.
Then, I tried this code:


but failed.

So, these questions arise:
- Are text files suitable for every case?
- If not, what type of files is suitable for what job? (Saving an array, for instance.)
- What is the right code to read the records back to the reciprocal array records?

Ps 1: I used two different Public Sub routines (not mentioned here) to write and read.
Ps 2: I created (and gave access to) my file with the following code, which works fine:

Try Str() and Val() to save/load values other than String

Print #hFile, Str(MyOwnArray[ii])

then read back with….

  Read #stream, line
  MyOwnArray.Add(Val(line))

Then Boolean values should work as expected

This code is wrong..

Your use of Try is not correct
The first Try is not needed. (and Try should be followed by a function on the same line) /lang/try - Gambas Documentation
"End Try" is not a command


Or all that code can be this…

So, these questions arise:
- Are text files suitable for every case?
Well only for data that can be converted to a string

- If not, what type of files is suitable for what job? (Saving an array, for instance.)
- What is the right code to read the records back to the reciprocal array records?

Like i said in my first post Settings.class is good for handling many different formats.
It can be used on local files of choice.

Save

Load

mandarin said

How can I write an array into a file ……
…and then read back the file records into that array?

Hello,
did you try ".Write()" and ".Read()" Methods of array ?

e.g.:
/comp/gb/byte - Gambas Documentation[]/read
/comp/gb/byte - Gambas Documentation[]/write

@BruceSteers:

Thanks! Finally, this code worked very well:


(When I entered "for ii = 1 to 36", I got a program halt; but, due to my experience, I changed the ii range from 0 to 35, and everything worked as expected.)

(Click to enlarge)

(Click to enlarge)

@vuott:

Thanks, I am still learning! Simple code first!

you are welcome.

btw File.Load does not require you Open and Close the file, it does it for you

I have used this type of command quite often, this is how I would do it: -

  cogier :

Thanks! I am keeping notes of everything.