Description Usage Arguments Value Examples
File system predicates
1 2 3 4 5 6 7 8 9 | does_file_exist(x)
is_directory(x)
is_writeable(x)
is_readable(x)
has_extension(x, ext)
|
x |
file system object to test |
ext |
file extension as a string |
logical value
1 2 3 4 | does_file_exist(system.file("DESCRIPTION"))
is_directory(system.file())
has_extension(system.file("DESCRIPTION"), "")
has_extension(system.file("R/base.rdb"), "rdb")
|
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