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Mon, 08 Nov 2021 12:46:07 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Zach Riggle Date: Mon, 8 Nov 2021 14:45:56 -0600 Message-ID: Subject: Re: Efficient way to map a list of values to multiple processes, then accumulate their output To: =?UTF-8?Q?Lawrence_Vel=C3=A1zquez?= Cc: Bart Schaefer , Zsh Users Content-Type: multipart/alternative; boundary="00000000000004739705d04d154e" X-Seq: 27329 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: --00000000000004739705d04d154e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable And after going to change my test script, I actually grokked what you were suggesting :) *Zach Riggle* On Mon, Nov 8, 2021 at 2:27 PM Zach Riggle wrote: > Ah-ha! Okay! I took "works exactly like xargs" a little too literally an= d > didn't read the docs closely enough. > > As always, thanks for your help guys! > > *Zach Riggle* > > > On Sat, Nov 6, 2021 at 5:56 PM Lawrence Vel=C3=A1zquez w= rote: > >> On Sat, Nov 6, 2021, at 5:58 PM, Zach Riggle wrote: >> > A very simple test works exactly correct, but a slight variation gives >> > me "zargs: argument list too long": >> >> From your gist: >> >> > # Works >> > zargs -P12 -n1 -- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 -= - >> wrapper1 >> >> > # Does not work --> zrgs: argument list too long >> > zargs -P12 -n1 -- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 -= - >> wrapper2 double >> >> From zshcontrib(1): >> >> zargs [ option ... -- ] [ input ... ] [ -- command [ arg ... ] ] >> >> [...] >> >> The options -i, -I, -l, -L, and -n differ slightly from their >> usage in `xargs`. There are no input lines for `zargs` to >> count, so -l and -L count through the "input" list, and -n >> counts the number of arguments passed to each execution of >> "command", *including* any "arg" list. >> >> So you actually want -n2. (Adjust to taste.) >> >> -- >> vq >> > --00000000000004739705d04d154e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
And after going to change my test script, I actually grokk= ed what you were suggesting :)

Zach Riggle
=


On Mon, Nov 8, 2021 at 2:27 PM Zach Riggle <zachriggle@gmail.com> wrote:
Ah-h= a! Okay!=C2=A0 I took "works exactly like xargs" a little too lit= erally and didn't read the docs closely enough.

As a= lways, thanks for your help guys!

Zach Rigg= le


On Sat, Nov 6, 2021 at 5:56 PM= Lawrence Vel=C3=A1zquez <larryv@zsh.org> wrote:
On Sat, Nov 6, 2021, at 5:58 PM, Zach Riggle wrote:
> A very simple test works exactly correct, but a slight variation gives=
> me "zargs: argument list too long":

>From your gist:

> # Works
> zargs -P12 -n1 -- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 -= - wrapper1

> # Does not work --> zrgs: argument list too long
> zargs -P12 -n1 -- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 -= - wrapper2 double

>From zshcontrib(1):

=C2=A0 =C2=A0 zargs [ option ... -- ] [ input ... ] [ -- command [ arg ... = ] ]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 [...]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 The options -i, -I, -l, -L, and -n differ sligh= tly from their
=C2=A0 =C2=A0 =C2=A0 =C2=A0 usage in `xargs`.=C2=A0 There are no input line= s for `zargs` to
=C2=A0 =C2=A0 =C2=A0 =C2=A0 count, so -l and -L count through the "inp= ut" list, and -n
=C2=A0 =C2=A0 =C2=A0 =C2=A0 counts the number of arguments passed to each e= xecution of
=C2=A0 =C2=A0 =C2=A0 =C2=A0 "command", *including* any "arg&= quot; list.

So you actually want -n2.=C2=A0 (Adjust to taste.)

--
vq
--00000000000004739705d04d154e--