From: Bakul Shah <bakul@bitblocks.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] rc's shortcomings (new subject line)
Date: Tue, 28 Aug 2012 12:53:02 -0700 [thread overview]
Message-ID: <20120828195302.8F128B827@mail.bitblocks.com> (raw)
In-Reply-To: Your message of "Tue, 28 Aug 2012 14:44:40 EDT." <5538fcd345a73fc294c6ee568f2fcdb4@kw.quanstro.net>
On Tue, 28 Aug 2012 14:44:40 EDT erik quanstrom <quanstro@quanstro.net> wrote:
> >=20
> > switch/case would make helluva difference over nested if/if not, if
> > defaulted to fall-through.
>
> maybe you have an example? because i don't see that. if not works
> fine, and can be nested. case without fallthrough is also generally
> what i want. if not, i can make the common stuff a function.
>
> > variable scoping (better than subshel) would help writing larger
> > scripts, but that's not necessarily an improvement ;-) something
> > similar to LISP's `let' special form, for dynamic binding.
>
> there is variable scoping. you can write
>
> x=3D() y=3D() cmd
>
> cmd can be a function body or whatever. x and y are then private
> to cmd. you can nest redefinitions. =20
>
> x=3D1 y=3D2 {echo first $x $y; x=3Da y=3Db {echo second $x $y; x=3D=CE=
> B1=
> y=3D=CE=B2 {echo third $x $y}; echo ret second $x $y}; echo ret first $x=
> $y}
> first 1 2
> second a b
> third =CE=B1 =CE=B2
> ret second a b
> ret first 1 2
This is basically the same as let. Instead of
let x=1 y=2 foo
you say
x=1 y=2 foo
and this is lexical scoping. try
lex=1 { echo $lex; }
echo $lex
vs
{ var=1; echo $var; }
echo $var
next prev parent reply other threads:[~2012-08-28 19:53 UTC|newest]
Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-28 8:57 [9fans] rc vs sh Rudolf Sykora
2012-08-28 9:47 ` hiro
2012-08-28 9:52 ` dexen deVries
2012-08-28 10:27 ` Rudolf Sykora
2012-08-28 13:07 ` Lucio De Re
2012-08-28 13:40 ` Rudolf Sykora
2012-08-28 14:10 ` Lucio De Re
2012-08-28 14:13 ` Kurt H Maier
2012-08-28 14:52 ` Lucio De Re
2012-08-28 15:05 ` Kurt H Maier
2012-08-28 15:18 ` Dan Cross
2012-08-28 15:30 ` Kurt H Maier
2012-08-28 15:45 ` Dan Cross
2012-08-28 17:43 ` Kurt H Maier
2012-08-28 18:20 ` Dan Cross
2012-08-28 18:26 ` Kurt H Maier
2012-08-28 18:39 ` Dan Cross
2012-08-28 18:47 ` Kurt H Maier
2012-08-28 20:42 ` Jeremy Jackins
2012-08-28 21:20 ` Dan Cross
2012-08-28 20:40 ` Uriel
2012-08-28 15:36 ` Lucio De Re
2012-08-28 15:35 ` Kurt H Maier
2012-08-28 15:41 ` erik quanstrom
2012-08-28 15:47 ` Kurt H Maier
2012-08-28 16:04 ` hiro
2012-08-28 16:05 ` Lucio De Re
2012-08-28 17:46 ` Kurt H Maier
2012-08-28 18:19 ` Lucio De Re
2012-08-28 18:18 ` Kurt H Maier
2012-08-28 20:44 ` Uriel
2012-08-31 22:24 ` Kurt H Maier
2012-08-31 23:00 ` Uriel
2012-08-31 23:15 ` hiro
2012-08-31 23:56 ` Matthew Veety
2012-09-02 15:20 ` suharik
[not found] ` <CAF9FGtS9xYBNzneNPs2eBkkqVGzn5V0FjdEWDYs_EaUu0waRvQ@mail.gmail.c>
2012-09-02 17:25 ` erik quanstrom
2012-09-02 20:40 ` suharik
2012-09-03 7:31 ` Rudolf Sykora
2012-09-03 8:22 ` dexen deVries
2012-09-03 10:04 ` suharik
2012-09-03 10:57 ` hiro
[not found] ` <CAF9FGtRdcFuuefr4q0zFBrkwaQ5a_-w4J-=xqo-MYp+phjQBaA@mail.gmail.c>
2012-09-03 13:42 ` erik quanstrom
[not found] ` <CAF9FGtTFskxpVd_CxGEKpRwfSihVjyREqWwFCmjiWksCKZoDvg@mail.gmail.c>
2012-09-03 13:46 ` erik quanstrom
2012-10-25 13:36 ` Ethan Grammatikidis
2012-10-25 13:48 ` erik quanstrom
2012-09-03 8:32 ` Balwinder S Dheeman
2012-08-28 16:06 ` tlaronde
2012-08-28 16:12 ` Aram Hăvărneanu
2012-08-28 16:32 ` tlaronde
2012-08-28 20:43 ` tlaronde
2012-08-28 18:13 ` Lucio De Re
2012-08-30 6:14 ` arnold
2012-08-30 7:41 ` Lucio De Re
2012-08-30 9:34 ` tlaronde
2012-08-30 10:26 ` Lucio De Re
2012-08-30 10:29 ` tlaronde
2012-08-30 10:50 ` Lucio De Re
2012-08-30 10:35 ` Dan Cross
2012-08-28 14:16 ` erik quanstrom
2012-08-28 14:58 ` Lucio De Re
2012-08-28 14:16 ` dexen deVries
2012-08-28 14:23 ` hiro
2012-08-28 14:34 ` hiro
2012-08-29 9:16 ` Balwinder S Dheeman
2012-08-29 15:10 ` Charles Forsyth
2012-08-29 15:22 ` hiro
2012-08-29 15:34 ` Charles Forsyth
2012-10-25 13:45 ` Ethan Grammatikidis
2012-10-25 13:56 ` dexen deVries
2012-08-28 15:09 ` Dan Cross
[not found] ` <CAEoi9W6K07ZgNS+7-oeQY3dkedW7qZLnOh79m5J7KCw7os5aEQ@mail.gmail.c>
2012-08-28 15:26 ` erik quanstrom
2012-08-28 15:40 ` Lucio De Re
2012-08-28 15:34 ` erik quanstrom
2012-08-28 18:24 ` dexen deVries
2012-08-28 18:44 ` [9fans] rc's shortcomings (new subject line) erik quanstrom
2012-08-28 19:34 ` dexen deVries
2012-08-29 0:06 ` arisawa
2012-08-29 8:12 ` dexen deVries
2012-08-28 19:41 ` Dan Cross
2012-08-28 20:14 ` Bakul Shah
2012-08-29 1:39 ` erik quanstrom
2012-08-29 1:43 ` erik quanstrom
2012-08-29 2:13 ` Bakul Shah
2012-08-29 2:23 ` erik quanstrom
2012-08-29 2:44 ` Bakul Shah
2012-08-29 4:28 ` erik quanstrom
2012-08-28 20:31 ` Aram Hăvărneanu
2012-09-04 17:27 ` 😜
2012-08-28 19:53 ` Bakul Shah [this message]
[not found] ` <CAEoi9W5bZE+coAaQA-Be4P_JQoB6TR31GS=gYhq=6BhHNXCRKw@mail.gmail.c>
2012-08-28 20:34 ` erik quanstrom
2012-08-28 22:46 ` Bakul Shah
2012-08-29 1:28 ` erik quanstrom
2012-08-29 8:09 ` dexen deVries
2012-08-29 8:38 ` Dan Cross
[not found] ` <CAEoi9W5_r=4w5EcdrbKuqD566p=C5KvEEHg72YKzdat18En2-w@mail.gmail.c>
2012-08-29 13:57 ` erik quanstrom
2012-08-29 15:07 ` Charles Forsyth
2012-08-30 10:05 ` Dan Cross
2012-08-30 10:43 ` Charles Forsyth
2012-08-30 13:41 ` dexen deVries
2012-08-30 13:47 ` erik quanstrom
2012-08-30 14:26 ` dexen deVries
2012-08-30 14:29 ` erik quanstrom
2012-08-30 14:24 ` Dan Cross
[not found] ` <CAEoi9W6NL-zGryJnMrAX3B77bk1bOEMfkv_R7M4W052LZR4yrg@mail.gmail.c>
2012-08-30 14:26 ` erik quanstrom
2012-08-30 14:33 ` Dan Cross
[not found] ` <CAEoi9W45W0pK7MA2FvxsCVCuRcqw-JxOiEn+JQtWMo0rFcSEpg@mail.gmail.c>
2012-08-30 14:41 ` erik quanstrom
2012-08-30 14:48 ` dexen deVries
2012-08-30 15:11 ` sl
2012-08-30 15:13 ` Lucio De Re
2012-08-30 15:07 ` Burton Samograd
2012-08-30 15:13 ` Charles Forsyth
2012-08-30 15:14 ` Charles Forsyth
2012-08-30 17:02 ` Bakul Shah
2012-08-30 17:18 ` erik quanstrom
2012-08-30 20:06 ` Charles Forsyth
[not found] ` <CAOw7k5jQxJCs64ZjrXp1mU0zTUTG6p7VXYX5ykwQ8OmFATLirg@mail.gmail.c>
2012-08-30 20:10 ` erik quanstrom
[not found] ` <CAEoi9W6c2JaxrTDwR76TjuN9DeBXnO6gueOGCaEh+Fksfb9zqQ@mail.gmail.c>
2012-08-30 13:33 ` erik quanstrom
2012-08-30 14:21 ` Dan Cross
2012-08-30 14:25 ` Dan Cross
2012-08-30 14:45 ` Charles Forsyth
2012-08-30 14:55 ` Charles Forsyth
[not found] ` <CAEoi9W5AagpdK4aZCYs5tSMESU3yoMe9bmgX3GcphTcYuMq9kQ@mail.gmail.c>
2012-08-30 14:34 ` erik quanstrom
2012-08-30 14:44 ` erik quanstrom
[not found] ` <CAOw7k5i-JO=bOS8h+S0zdWghCWhSN36uFebMYnzvs=fdNQgA+g@mail.gmail.c>
2012-08-31 1:33 ` erik quanstrom
2012-10-25 14:56 ` [9fans] rc vs sh Ethan Burns
2012-10-25 15:08 ` hiro
2012-10-25 17:02 ` Gorka Guardiola
2012-10-25 17:18 ` Matthew Veety
2012-10-25 17:26 ` John Floren
2012-10-25 19:03 ` hiro
2012-10-25 19:08 ` Skip Tavakkolian
2012-08-30 15:24 [9fans] rc's shortcomings (new subject line) Lucio De Re
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