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

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.

See also

when-file-exists, unless-file-exists

Definition

USING: kernel ;

IN: io.files

: if-file-exists
    ( ..a path true: ( ..a path -- ..b ) false: ( ..a path -- ..b ) -- ..b )
    [ dup file-exists? ] 2dip if ; inline