On Sunday 20 November 2011 11:54:42 Pierre Gaston wrote: > On Sun, Nov 20, 2011 at 6:43 PM, Peng Yu <pengyu...@gmail.com> wrote: > > Hi, > > > > I don't see if there is a way to directly modify $@. I know 'shift'. > > But I'm wondering if there is any other way to modify $@. > > > > ~$ 1=x > > -bash: 1=x: command not found > > ~$ @=(a b c) > > -bash: syntax error near unexpected token `a' > > you need to use the set builtin: > set -- a b c
yep
to pop items off the end:
shift [n]
to add items to the end:
set -- "$@" a b c
to add items to the start:
set -- a b c "$@"
to extract slices:
set -- "${@:<first idx>[:<num items>]}"
e.g.
set -- a b c
set -- "${@:2:1}" # this sets $@ to (b)
with those basics, you should be able to fully manipulate $@
-mike
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