Map.put

You're seeing just the function put, go back to Map module for more information.

Specs

put(map(), key(), value()) :: map()

Puts the given value under key in map.

Inlined by the compiler.

Examples

iex> Map.put(%{a: 1}, :b, 2)
%{a: 1, b: 2}
iex> Map.put(%{a: 1, b: 2}, :a, 3)
%{a: 3, b: 2}