On Fri, Jun 23, 2000 at 08:51:44PM -0400, Peter Kovacs wrote: > On Sat, 24 Jun 2000, Mark Phillips wrote:
> > for f in $(cd.... > > From man 1 bash: > Command Substitution > Command substitution allows the output of a command to > replace the command name. There are two forms: > > $(command) > or > `command` > > That's why I had the backticks in there. I've never seen the > $() construct either. The key difference is that $( command list ) is nestable without quoting, backticks are not. If you've ever written: $ foo `bar \`baz qux\` ` ...nested to several levels, you'll appreciate: $ foo $( bar $( baz qux ) ) ...it becomes trivial to build complex expressions interatively on the command line with command-line editing, without having to worry about quoting backticks and such. The functionality is common in a number of shells other than bash, though I'm not quite sure which. I believe the Unix posix-compliant (bastardized korn) and possibly korn shells support it. -- Karsten M. Self <kmself@ix.netcom.com> http://www.netcom.com/~kmself Evangelist, Opensales, Inc. http://www.opensales.org What part of "Gestalt" don't you understand? Debian GNU/Linux rocks! http://gestalt-system.sourceforge.net/ K5: http://www.kuro5hin.org GPG fingerprint: F932 8B25 5FDD 2528 D595 DC61 3847 889F 55F2 B9B0
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