Questions & Help>Questions

Delete the 1st pair in a map

#ecto_enum#elixir-map
docjazither

docjazither

Delete the 1st pair in a map

Hi OGs,
How can I delete the 1st pair in a map ?
Thank you

61 comments
#ecto_enum#elixir-map
73 3205 61

Most Liked

sodapopcan

sodapopcan

OP doesn’t seem to care that they are out of order but I’m dying to know the use-case :joy:

8
Post #14
adamu

adamu

Please post your code showing how your map is constructed. As @msimonborg said, there is no such concept of the “first” item in a map.

6
Post #5
jhogberg

jhogberg

Erlang Core Team

If you don’t specifically need a map, consider using :gb_trees instead. Its take_smallest/1 and take_largest/1 operations are bound to be quicker than converting to list, sorting, deleting the first entry, and then creating a map again.

6
Post #13

Where Next?

View thread on forum (has 61 responses!)
ecto_enum
elixir-map
Home Questions & Help>Questions
#ecto_enum#elixir-map
73 3213 61
Last post

Popular in Questions Top

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 25019 65
New
chrisalley
Questions & Help>Questions

How to describe many contexts in ExUnit without a hierarchy
ExUnit now has describe blocks which is a welcome addition coming from RSpec. In the docs, it states that nested hierarchies of describe ...
#testing#exunit
66 16926 4
New
shahryarjb
Questions & Help>Questions

How to convert map to string (separated with ,)
Hello, I have map which I want to convert it to string like this: the map: %{last_name: "tavakkoli", name: "shahryar"} the string I ne...
#maps#strings
15 15660 2
New
shahryarjb
Questions & Help>Questions

How to convert Date to DateTime which Ecto needs
Hello, I get Persian date from my client and convert it to normal calendar like this: def jalali_string_to_miladi_english_number(persi...
#ecto#datetime
15 15128 5
New
LegitStack
Questions & Help>Questions

Websocket server in Elixir or phoenix
I’m trying to make a websocket server in Phoenix or raw Elixir. I heard about gun, I think I could use cowboy, but since I’m not that sma...
/phoenix#websockets
20 11845 8
New
stefanchrobot
Questions & Help>Questions

How to decode a JSON into a struct safely?
What’s the safe way to decode a JSON string into a struct? I want to avoid calling String.to_atom. Jason.decode can give me a map with st...
#structs#json
29 21152 26
New
srinivasu
Questions & Help>Questions

Best Practises for Error handling elixir?
How to handle excepions in elixir? Suppose i have A, B, C ,D, E modules. and each module has get() function. A.get() method will call t...
16 16209 9
New
shijith.k
Questions & Help>Questions

Hex version - ** (Mix) The task "phx.new" could not be found
I am trying to start a new phoenix project with elixir 1.9, but mix phx.new does not work. It says that ** (Mix) The task "phx.new" could...
/phoenix#hex
66 25407 15
New
yawaramin
Questions & Help>Questions

Dialyzer: suppress warning on a specific function
In the Dialyzer docs ( dialyzer — OTP 29.0.2 (dialyzer 6.0.1) ), there is a way to turn off a specific warning for a function: -dialyzer...
#dialyzer
26 14015 7
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 34961 13
New

Other popular topics Top

Darmani72
Questions & Help>Questions

Params in the URL and body -- how does Phoenix handle them together?
If I have a post route which an argument: post /my_post_route/:my_param1, MyController.my_post_handler How would get the post params ...
/phoenix#params
17 26931 14
New
sorentwo
News>Announcing

Oban - Reliable and Observable Job Processing
Hello! tl;dr Announcing Oban, an Ecto based job processing library with a focus on reliability and historical observability. After spen...
/oban#ecto#postgres#job-processing
985 42920 311
New
TunkShif
Chat & Discussions>Wikis

Neovim - Elixir Setup Configuration from Scratch Guide
This post is an instruction guide to help you setup your Neovim for Elixir development from scratch. It includes general information on h...
#wiki#code-editors#neovim#language-server-protocol
274 41539 114
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 25019 65
New
Nvim
Chat & Discussions>Discussions

Django vs Phoenix
Anybody knows a comprehensive comparison of Django and Phoenix, thanks for the help. Where are they similar? Where do they differ the m...
/phoenix#learning-elixir
184 21696 82
New
ovidiubadita
Questions & Help>Questions

Elixir for game development
Hey all, I discovered Elixir and I love it. I always wanted to learn a functional programming and I intended to go for Haskell, but afte...
#game
30 23559 25
New
msaraiva
News>Announcing

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#library#liveview#livecomponents#surface
564 43622 214
New
bsollish-terakeet
Questions & Help>Questions

Checking if an enum is empty - Credo vs Compiler
Credo is smart enough to check for (something like) this: assert length(the_list) == 0 with this response: Checking if an enum is empt...
#compiler#credo
8 23194 6
New
saif
Chat & Discussions>Discussions

Dialyzer - Function foo/1 has no local return
Hello everyone, Long time lurker first time poster here. I’ve recently begun working on Elixir full-time again! :raised_hands: It’s been...
#dialyzer#type-checking
15 20032 5
New
lanycrost
Questions & Help>Questions

How To Implement if...else if...else condition
Hi everyone! I need implement if…else if…else condition from my elixir code, and anymore of this control flow structures not work proper...
#how-to-question
40 52286 6
New
Back to top

Questions & Help>Questions

Questions Questions ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

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.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

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.

Software Mansion

The team behind Membrane, Popcorn, LiveDebugger. Available for hire.

Pragmatic Studio

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

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Popular Tags

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.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

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.

Software Mansion

The team behind Membrane, Popcorn, LiveDebugger. Available for hire.

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