Chat & Discussions>Proposals: Ideas

ETS table select_take

#erlang#ets
tristan

tristan

Rebar3 Core Team

ETS table select_take

This is a cross post from the Erlang Forums. ETS table `select_take` - Proposals: Ideas - Erlang Programming Language Forum - Erlang Forums

I’ve been in need for an ets:select_take function. Currently a select of all keys for matching elements followed by a take is required since select_delete returns only the number of deleted elements. Could also do a select/match followed by a delete but that would mean some updates would technically succeed on an element but not be part of what was selected.

Curious if anyone else has encountered need for this and if anyone knows what an implementation would look like.

4 comments
#erlang#ets
8 88 4

Most Liked

christhekeele

christhekeele

I’ve noticed this hole in the :ets API as well, though I can’t say I have any idea how to implement. I think it’s a great proposal!

2
Post #2
tristan

tristan

Rebar3 Core Team

Yea. An update that happens in another process during the selecting/deleting. So you select the elements, get some element A and in another process A is updated, which succeeds but then A is deleted from the table. Better, in some cases, that the update to A fails instead of being silently lost.

2
Post #5

Where Next?

View thread on forum (has 4 responses!)
erlang
ets
Home Chat & Discussions>Proposals: Ideas
#erlang#ets
8 89 4
Last post

Popular in Proposals: Ideas Top

MeerKatDev
Chat & Discussions>Proposals: Ideas

Introduce a PHP-style `compact` function
many times we do stuff like (e.g. test setups, json views in phoenix) aaa = ... bbb = ... ccc = ... %{aaa: aaa, bbb: bbb, ccc: ccc} and...
#defmacro
3 128 3
New
rhcarvalho
Chat & Discussions>Proposals: Ideas

Mix Git dependency with shallow clone
Hi all, I would like to gather some feedback before a more intentional proposal to add a new :depth option when specifying a Git depende...
#mix#git
5 56 2
New
rekkice
Chat & Discussions>Proposals: Ideas

IEx - Expose API to evaluate code inside IEx session for REPL Integrations
I’m building an editor integration to evaluate Elixir code in an IEx session. While Code.eval_string/3 allows tracking variable bindings,...
#iex#integration#code-editors
5 78 3
New
kip
Chat & Discussions>Proposals: Ideas

Proposal: DateTime.from_iso8601/3 preserves wall date time and applies Etc/GMT±n time zone ID
Sumary of proposal DateTime.from_iso8601/3 adjusted to: set all numeric fields to the values as parsed (not shifted to UTC), preservi...
#datetime#elixir
11 68 4
New
pdgonzalez872
Chat & Discussions>Proposals: Ideas

Hiring section maybe?
Hi! There has been some discussion about hiring/jobs on here and I thought about running this by everyone. I wanted to try to help recr...
#hiring#recruiting
19 137 1
New
dli
Chat & Discussions>Proposals: Ideas

Support :insert_all in data-modifying CTE / WITH statements
Ecto currently supports some data-modifying WITH statements / CTEs for Postgres: Options: […] :operation - one of :all , :update_all ,...
#ecto#postgres#ecto_sql
1 42 1
New
winsalva
Chat & Discussions>Proposals: Ideas

Mix assets.build throws mix tailwind default exited with 159
Hello all. First of all i’m running this using termux on an android phone. Running mix assets.setup shows this message 06:54:08.450 [de...
/phoenix#troubleshooting
0 23 0
New
bartblast
Chat & Discussions>Proposals: Ideas

Keyword inside tuple shorthand syntax {a: 1, b: 2}
This could resolve to {[a: 1, b: 2]}. Was it ever considered to allow such syntax? Notice this: {:abc, a: 1, b: 2} and this: my_fun(:abc,...
#syntax#keyword#tuples
18 151 16
New
sezaru
Chat & Discussions>Proposals: Ideas

Proposal: Support for __PARENT_MODULE__ (or some other better name)
When writing my code, I always find __MODULE__ very useful to use as alias of that module “inner dependencies”, ex: alias __MODULE__.{Im...
#module-naming
25 264 19
New
dkuku
Chat & Discussions>Proposals: Ideas

Am I the only one who can't spot the difference in map keys
This is a proposal to make the map key mismatch errors a bit better: Every time I have a typo It’s very challenging for me even when I u...
#error-messages
7 144 16
New

Other popular topics Top

josevalim
Official Elixir>Proposals

Behaviours, defoverridable and implementations
Hi everyone, One of the features added to Elixir early on to help integration with Erlang code was the idea of overridable function defi...
#official-elixir-proposal
111 22687 35
New
minhajuddin
Questions & Help>Questions

Using List.first instead of Enum.at(0)
I have seen a lot of code which picks the first element from a list using Enum.at(0) instead of List.first. Is there a reason why people ...
#code-style
76 33273 14
New
vonH
Questions & Help>Questions

Why would I choose Elixir as a general purpose programming language?
In asking this question I am more interested about the expressiveness of the language itself and less concerned about the availability of...
#functional-programming#use-cases
65 34758 13
New
albydarned
Questions & Help>Questions

Erlang and Elixir on Apple Silicon/M1 Chip
Hello all! I am typing this post from my new MacBook Pro with the M1 chip. I’m loving it so far, and will probably use it as my daily dr...
#erlang#troubleshooting
121 24599 65
New
romenigld
Questions & Help>Questions

Docker run Error loading shared library libstdc++.so.6 and libgcc_s.so.1
I am trying to run a deploy with docker and I successfully runned with this command: docker build -t romenigld/blog-prod . but when I t...
/phoenix#deployment#docker-compose
30 19932 15
New
quazar
Questions & Help>Questions

How to encode ecto schema with Jason with all fields
How to set Jason to encode all fields in ecto schema, I don’t care about security and implementing only is taking long list of attributes...
/phoenix#json#jason
17 13698 9
New
alice
Questions & Help>Questions

What are the main benefits of Elixir compared to Clojure?
Hey, Just curious what are the main benefits of Elixir compared to Clojure? When is Elixir more useful than Clojure and vice versa? Th...
#clojure
223 32979 47
New
qwerescape
Questions & Help>Questions

How to get the call stack/stack trace at any point in code?
Is there a way to get the call stack or stack trace at any point in the code? Not from exceptions, but an expression that returns how the...
53 15772 4
New
msaraiva
Your Libraries & Projects>Libraries

Surface - A component-based library for Phoenix LiveView
Surface is an experimental library built on top of Phoenix LiveView and its new LiveComponent API that aims to provide a more declarative...
/phoenix#liveview#livecomponents#surface
564 42633 214
New
beno
Questions & Help>Questions

Pattern match with multiple match options
I will often find my self writing things similar to: case some_value do nil -> something() "" -> something() _ -> someth...
#pattern-matching#how-to-question
29 15490 6
New
Back to top

Chat & Discussions>Proposals: Ideas

Chat Proposals: Ideas ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

Potions

The deployment platform built for Elixir: PaaS ease, VPS control.

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Manning

Develop your skills with books, videos, and courses.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

WyewWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Manning

Develop your skills with books, videos, and courses.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

WyewWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement