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Declined New conditionals for directories

I don't know if readability is the right word, but there are a number of places (junctions) that you can get to (as CWD) in which you can't see anything.

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What is the point of the numerous, seemingly badly behaved, junctions in one's profile directory? You can't enter them with Explorer, but you can with a command prompt. You can't read at the top level but if you know the names of things you canread sub directories.

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Not arguing with you, Vince. I've never understood those either.

To the original suggestion: The easiest way to find out whether a directory is readable is to try reading it. The easiest way to find out whether it's writable is to try writing to it — e.g. try creating and deleting a temp file there. My first thought would be to write it as a function, which could then be used in IF, IF, etc. as desired.
 
Not arguing with you, Vince. I've never understood those either.

To the original suggestion: The easiest way to find out whether a directory is readable is to try reading it. The easiest way to find out whether it's writable is to try writing to it — e.g. try creating and deleting a temp file there. My first thought would be to write it as a function, which could then be used in IF, IF, etc. as desired.
Writable is the easy one (as you said, just try it). I don't fully understand and I don't know how robust this is, but "EXIST *" seems to be able to tell the difference between an empty directory (where it's true?) and a directory that you can't read (where it's false). Note that "EXIST NUL" doesn't work.

Code:
v:\> if exist "c:\Users\vefatica\Application Data"\* echo foo

v:\> if exist v:\empty\* echo foo
foo
 
Similarly @FILES[*] will be at least 2 (. and ..) in a directory which you can read, and 0 in a directory that you can't read.

Note: "EXIST ." is always true
 
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