CODEWITHSUNDEEP
stringelixir
Iggy
Iggy

Reputation: 5251

How to easily get nth String character in Elixir?

In Ruby, I can easily get nth element of a string by "Hello"[0] #=> "H".

I am aware of String.slice/3 in Elixir and I can do it this way: String.slice("Hello", 0..0). This method seems a little verbose though, is there a shorter way to get nth element of string in Elixir?

Upvotes: 2

Views: 1129

Answers (1)

Dogbert
Dogbert

Reputation: 222108

To get the nth grapheme as a String, you can use String.at/2:

iex(1)> String.at "hello", 2
"l"
iex(2)> String.at "πr²", 2
"²"

To get the nth byte as an integer, you can use :binary.at/2:

iex(3)> :binary.at "hello", 2
108
iex(4)> <<108>>
"l"
iex(5)> :binary.at "πr²", 2
114
iex(6)> <<114>>
"r"

Upvotes: 5

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