Doing it with command line switches

On the chatterbox, PhilHibbs asked Does anyone know how to make ls produce a comma-separated list, or have a perl one-liner to do it?

Here's a solution that does it all with command line switches:

    ls -1|perl -054lp012e1
[download]

I leave it as an exercise to the reader to figure out how it works.

Comment on Doing it with command line switches Download Code

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Re: Doing it with command line switches by toolic (Bishop) on Dec 10, 2009 at 14:08 UTC
Not nearly as obfu, and non-Perl, but fewer keystrokes :) `ls -1\|tr '\n' ,` [download]	[reply] [d/l]
Re^2: Doing it with command line switches by JavaFan (Canon) on Dec 10, 2009 at 14:22 UTC
Even shorter: `ls -mw 100000` [download] assuming that 100000 chars is enough.	[reply] [d/l]
Re^2: Doing it with command line switches by ambrus (Abbot) on Dec 11, 2009 at 16:09 UTC
Note that `tr \\n ,` is one character shorter than `tr '\n' ,`	[reply] [d/l] [select]
Re^2: Doing it with command line switches by Anonymous Monk on Dec 13, 2009 at 23:58 UTC
That's cheating, don't forget perl -e 'open X, ">foo\nbar";'	[reply]
Re: Doing it with command line switches by bv (Friar) on Dec 10, 2009 at 14:57 UTC
`perl -e '$,=",";print @ARGV' *` `@_=qw; Just another Perl hacker,; ;$_=q=print "@_"= and eval;` [download]	[reply] [d/l] [select]
Re^2: Doing it with command line switches by Tux (Canon) on Dec 10, 2009 at 16:39 UTC
`perl -wle'$,=",";print<*>'` Enjoy, Have FUN! H.Merijn	[reply] [d/l]
Re: Doing it with command line switches by ambrus (Abbot) on Dec 11, 2009 at 11:32 UTC
I think the `-1` is not needed. At least the gnu coreutils and the freebsd versions of ls default to using multi-column output only when the output goes to a terminal, and single-column output otherwise. In fact, even POSIX mandates that the single-column output is the default when the output is not to a terminal, and leaves the other case implementation-defined. (This is of course unless you alias ls to something stupid, which many people and even distributions do, but that's their fault, and in that case `\ls` is still shorter than `ls -1`.)	[reply] [d/l] [select]