if-file-exists ( ..a path true: ( ..a path -- ..b ) false: ( ..a path -- ..b ) -- ..b ) (original) (raw)

Vocabulary
io.files

Inputs

path	a pathname string
true	a quotation with stack effect ( ..a path -- ..b )
false	a quotation with stack effect ( ..a path -- ..b )

Outputs
None

Word description
If path is a file that exists, calls the true quotation, otherwise calls the false quotation.

Notes
It is possible for the file to be created or deleted after the call to file-exists? but before running true or false. If that is a concern, you might want to open the file for reading or writing, as needed.

Definition