Kagamiiiii
Get ascii value of a character
Student & New to elixir. Nice language.
I want to convert a english character, e.g. “a”, which is stored in a variable, to it’s ascii value, but I can’t find the function (I found similiar one for << 255 :: utf8 >> but didn’t work for ascii value)
and syntax like ?a didn’t work for variable.
Appreciated for you help!
Most Liked
gregvaughn
Here’s two ways to do it:
iex(9)> var = "a"
"a"
iex(10)> <<v::utf8>> = var
"a"
iex(11)> v
97
iex(12)> var |> String.to_charlist |> hd
97
kip
If you are certain you are working with ASCII (ie single byte code points) then you can also:
iex> :binary.first "abcdef"
97
But @gregvaughn’s approach would be preferred since it will work with any UTF-8 string.
NobbZ
?a gives you the Unicode codepoint of a as an integer, the first 128 (0 to 127) codepoints are equivalent to US-ASCII.
So I’m not sure what your problem is.
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Develop your skills with books, videos, and courses.
Categories:
Sub Categories:
Forums
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.
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.
Courses that'll move you from confusion to "Aha, now I get it!"