is_file
aliases: [ceammc/is_file]
checks if the file exists and accessible
available since version: 0.2
If relative path is given file searched under patch directory

inlets:
- outputs '1' if file exists and can be opened, otherwise '0'
type: control
outlets:
- 0 or 1
type: control
- symbol os String: pass filename if file exists
type: control
keywords:
predicate
filesystem
Authors: Serge Poltavsky
License: GPL3 or later