From: Ruijie Yu via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: Arthur Miller <arthur.miller@live.com>
Cc: Hans Lonsdale <hanslonsdale@mailfence.com>, help-gnu-emacs@gnu.org
Subject: Re: Finding repetitions of 8-tuples
Date: Sun, 01 Jan 2023 10:00:26 -0600 [thread overview]
Message-ID: <sdvr0we6y41.fsf@fw.net.yu> (raw)
In-Reply-To: <AM9PR09MB4977292E2D6088645EBE316C96F69@AM9PR09MB4977.eurprd09.prod.outlook.com>
Arthur Miller <arthur.miller@live.com> writes:
> Hans Lonsdale <hanslonsdale@mailfence.com> writes:
>
>> I have 16 collections of 8 numbers
>>
>> (11 12 11 44 11 12 11 23)
>> (12 21 11 44 11 12 11 23)
>> and so on
>>
>> I want to find whether there are repetitions of each 8-tuple.
>> The order in which the numbers occur is not important.
>
> Have you looked at "lists as sets" chapter in the manual?
>
> There is a 'cl-subsetp' you could start with:
>
> cl-subsetp is an autoloaded native-compiled Lisp function in ‘cl-seq.el’.
>
> (cl-subsetp LIST1 LIST2 [KEYWORD VALUE]...)
>
> Return true if LIST1 is a subset of LIST2.
> I.e., if every element of LIST1 also appears in LIST2.
>
> Keywords supported: :test :test-not :key
>
>
> (defvar l1 '(11 12 11 44 11 12 11 23))
> (defvar l2 '(12 21 11 44 11 12 11 23))
>
> (cl-subsetp l1 l2) ;; returns t
I looked around and found out that `seq-set-equal-p' might be more
suitable for this task: this function performs a set-equality check
between the two lists (or, more broadly, sequences) whereas `cl-subsetp'
checks for subsets, as you have noted later in your message.
> [...]
Best,
RY
next prev parent reply other threads:[~2023-01-01 16:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-31 17:00 Finding repetitions of 8-tuples Hans Lonsdale
2023-01-01 15:13 ` Arthur Miller
2023-01-01 16:00 ` Ruijie Yu via Users list for the GNU Emacs text editor [this message]
2023-01-01 16:39 ` Yuri Khan
2023-01-01 17:08 ` Hans Lonsdale
2023-01-01 15:16 ` Ruijie Yu via Users list for the GNU Emacs text editor
2023-01-01 15:38 ` Hans Lonsdale
2023-01-08 4:39 ` Emanuel Berg
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