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Fri, 19 Jan 2024 08:01:08 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a05:7208:900e:b0:7c:1c56:f24 with HTTP; Fri, 19 Jan 2024 08:01:07 -0800 (PST) In-Reply-To: References: <7b20b425-59b2-466d-a9aa-a2768d1d4633@app.fastmail.com> <4b475319-ef78-4d46-a62c-27c3b0af3ea4@eastlink.ca> <49702cd2-814c-4461-9819-cc2b85bd3ea2@eastlink.ca> <50941e8e-86e2-4e89-8644-c863f846e805@eastlink.ca> <20240119102755.5ma5psbccsuo5ohj@chazelas.org> From: Mikael Magnusson Date: Fri, 19 Jan 2024 17:01:07 +0100 Message-ID: Subject: Re: Empty element elision and associative arrays (was Re: Slurping a file) To: "Mark J. Reed" Cc: zsh-users@zsh.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 29526 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: On 1/19/24, Mark J. Reed wrote: > On Fri, Jan 19, 2024 at 9:58=E2=80=AFAM Ray Andrews wrote: > > In fact, as far as I can tell, there's currently no good way to get from = a > value to its associated key at all. If you want the key/value pairs in > order with current zsh, there is a ready solution: simply iterate through > the sorted keys returned by *ko* and use them to get the associated value= : > > for key in "${(@ko)array}"; do > ... something with "$key" and "${array[$key]}" here ... > done > > But if you instead iterate through the values (with or without *o*), > there's no analogous way to get back to the corresponding key. Maybe that= 's > the missing functionality we should look into instead: inverting an > associative array. Of course duplicate values are troublesome in this > regard. Keys are unique but values aren't, so it's sort of a nonsensical request; that said, you can do it ;). % typeset -A foo; foo=3D( 1 bar 2 bar 3 quux 4 baz ) % echo ${(k)foo[(R)bar]} 1 2 --=20 Mikael Magnusson