Verify the existence of a folder or directory

[angelo2449]

Hi guys,
I look for a routine that verifies the existence of a folder or directory like FileExists() .....
Thank You.

[tsh73]

Internet wayback machine has this, with native LB commands
web.archive.org/web/20150801085553/https://justbasic.wikispaces.com/dirExists

[Alyce Watson]

Oct 21, 2018 6:52:31 GMT -5 angelo2449 said:

Hi guys,
I look for a routine that verifies the existence of a folder or directory like FileExists() .....
Thank You.

FileExists() is not a Liberty BASIC function. It is a user-defined function that makes use of Liberty BASIC's FILES statement. You can "roll your own" FolderExists() function by making use of the FILES statement. It would be a good exercise for an LB user to gain a better understanding of the FILES statement. There is also an archive of tutorials and "how-tos" from the LBPE here:
File operations at LBPE (archive.)

If you create a FolderExists() function, please share it here!


From the help file:

Testing for File Existence

Here is a short user-defined function which can be used to test if a file exists on disk. It is important to know if a file exists because attempting to access a nonexistent file can cause a program to crash.



function fileExists(path$, filename$)

'dimension the array info$( at the beginning of your program

files path$, filename$, info$()

fileExists = val(info$(0, 0)) 'non zero is true

end function



If the file is to be in the default directory, and named users.dat this example shows how to test for its existence with the fileExists function:



dim info$(10, 10)

if fileExists(DefaultDir$, "users.dat") then

notice "It's alive!"

else

notice "Igor! I need more power!"

end if



The dim info$(10, 10) statement is important because the files command in the function needs to have a double dimensioned array ready to accept its list of files and their information. See FILES.

[Brandon Parker]

Check out this thread; I literally just posted something you might be interested in.

usb-memory-stick


{:0)

Brandon R. Parker