mirror of
https://github.com/jbranchaud/til
synced 2026-01-03 15:18:01 +00:00
27 lines
579 B
Markdown
27 lines
579 B
Markdown
# Replace Duplicates In A Keyword List
|
|
|
|
Use the
|
|
[`Keyword.put`](http://elixir-lang.org/docs/stable/elixir/Keyword.html#put/3)
|
|
function to replace duplicate key entries in a keyword list.
|
|
|
|
If there are no duplicate entries, the entry will just be added.
|
|
|
|
```elixir
|
|
Keyword.put([a: 1], :b, 2)
|
|
[b: 2, a: 1]
|
|
```
|
|
|
|
If there is a duplicate entry, it will be replaced by the new value.
|
|
|
|
```elixir
|
|
> Keyword.put([b: 1, a: 1], :b, 2)
|
|
[b: 2, a: 1]
|
|
```
|
|
|
|
If there are multiple duplicate entries, they will all be replaced.
|
|
|
|
```elixir
|
|
> Keyword.put([b: 3, b: 4, a: 1], :b, 2)
|
|
[b: 2, a: 1]
|
|
```
|