Re: [ -d (#i)Temp ]

Ray Andrews <[email protected]> writes:

> I remember at one point I wanted to do a global replacement of [ 
> with
> [[ and there were those places where things broke.  Gotta 
> remember
> these subtle differences.

Something to keep in mind is that `[` is a builtin and/or command, 
whereas `[[` is syntax:

$ whence -v [ 
[ is a shell builtin
$ whence -v [[
zsh: bad pattern: [[

(The entry for `test` in zshbuiltins(1) has more details.)

Where `[` is a command, it's an alternate form of the `test` 
command, to the extent that on some systems they're actually the 
same binary. GNU Coreutils provides both `/usr/bin/[` and 
`/usr/bin/test`.


Alexis.