Keyword.update
You're seeing just the function
update
, go back to Keyword module for more information.
Specs
update( t(), key(), default :: value(), (existing_value :: value() -> new_value :: value()) ) :: t()
Updates the key
in keywords
with the given function.
If the key
does not exist, it inserts the given default
value.
If there are duplicated keys, they are all removed and only the first one is updated.
The default value will not be passed through the update function.
Examples
iex> Keyword.update([a: 1], :a, 13, fn existing_value -> existing_value * 2 end)
[a: 2]
iex> Keyword.update([a: 1, a: 2], :a, 13, fn existing_value -> existing_value * 2 end)
[a: 2]
iex> Keyword.update([a: 1], :b, 11, fn existing_value -> existing_value * 2 end)
[a: 1, b: 11]