lpvm
I get an error when calling Bob.heyfunction
def foldl(list, acc, fun) when is_list(list) and is_function(fun)
code: assert Bob.hey("Tom-ay-to, tom-aaaah-to.") == "Whatever."
stacktrace:
(elixir) lib/list.ex:188: List.foldl/3
bob.exs:11: Bob.hey/1
bob_test.exs:12: (test)```
The two functions related to the error are:
```def remove_misplaced_chars(str) do
str
|> List.foldl("", fn(ch, acc) -> if valid_char?(ch), do: acc <> ch, else: acc end)
end
def valid_char?(ch) do
ch_up = String.upcase ch
if List.first(to_charlist(ch_up)) in 65..90 or ch == ",", do: true, else: false
end
What is wrong?
Where Next?
Trending in Questions
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
Bringing learning, work and compliance together since 1987.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixirconf-us
- #ai
- #blog-post
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #metaprogramming
- #hex
- #security
Our Sponsors
Build Elixir applications with speed and confidence.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!
Master modern tools, write cleaner code, and tackle real-world challenges.
**Building the future of software with AI, trust, and human connection.**
The deployment platform built for Elixir: PaaS ease, VPS control.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 1- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
bobbypriambodo
List.foldl accepts a list and you’re giving it a string, which is not a list. I believe you could first split it with
String.codepointsbefore feeding it to foldl.