adrian
Regex and unicode returning wrong indexes
Hello,
I need to find the position of a match using Regex.run on a text with unicode characters.
This is an example:
iex> Regex.run(~r/x/u, "áéíóúx", return: :index)
[{10, 1}]
When te expected output should be: [{5, 1}]
Shouldn’t the unicode modificator take care of this? how could I get the right result?
Thanks!
First Post!
idi527
how could I get the right result?
For exactly this example
iex(1)> [before, _after] = :binary.split("áéíóúx", "x")
["áéíóú", ""]
iex(2)> String.length(before)
5
seems to work.
Most Liked
NobbZ
The index returned is the byte index, and this is perfect for further processing it in parallel to the original input, eg, when cutting the matched substring, as indexing per byte is O(1), per character/glyph is O(n).
idi527
Have you considered using GitHub - dashbitco/nimble_parsec: A simple and fast library for text-based parser combinators · GitHub?
Last Post!
adrian
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Catch errors, track performance, monitor hosts and more.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #elixirconf
- #exunit
- #discussion
- #code-sync
- #javascript
- #podcasts
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #blog-post
- #graphql
- #genstage
- #ai
- #websockets
- #supervisor
- #elixirconf-us
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #metaprogramming
- #security
- #hex
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
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.
Develop your skills with books, videos, and courses.
Enabling companies to succeed by building software people love.
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!"