Strings

Remarks#

A String in Elixir is a UTF-8 encoded binary.

Convert to string

Use Kernel.inspect to convert anything to string.

iex> Kernel.inspect(1)
"1"
iex> Kernel.inspect(4.2)
"4.2"
iex> Kernel.inspect %{pi: 3.14, name: "Yos"}
"%{pi: 3.14, name: \"Yos\"}"

Get a substring

iex> my_string = "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
iex> String.slice my_string, 6..10
"ipsum"

Split a string

iex> String.split("Elixir, Antidote, Panacea", ",")
["Elixir", "Antidote", "Panacea"]

String Interpolation

iex(1)> name = "John"
"John"
iex(2)> greeting = "Hello, #{name}"
"Hello, John"
iex(3)> num = 15
15
iex(4)> results = "#{num} item(s) found."
"15 item(s) found."

Check if String contains Substring

iex(1)> String.contains? "elixir of life", "of"
true
iex(2)> String.contains? "elixir of life", ["life", "death"]
true
iex(3)> String.contains? "elixir of life", ["venus", "mercury"]
false

Join Strings

You can concatenate strings in Elixir using the <> operator:

"Hello" <> "World"                           # => "HelloWorld"

For a List of Strings, you can use Enum.join/2:

Enum.join(["A", "few", "words"], " ")        # => "A few words"