Hello,

After working with Elixir for some time I have found myself repeating some 
patterns when dealing with maps.

One pattern I see repeated constantly in different apps developed by myself 
or others is adding values to a map conditionally or returning the map 
unchanged. This comes in different flavors:

[image: Screenshot 2024-12-06 at 11.13.23 AM.png]
or
[image: Screenshot 2024-12-06 at 11.14.32 AM.png]

When this pattern gets used enough in an app, it's normal to see it 
abstracted in a MapUtils module that updates the map conditionally if a 
condition is met or returns the map unchanged otherwise.

My proposal is to include Map.put_if/4 which would abstract the condition 
check and return the map unchanged if the condition is not met:

[image: Screenshot 2024-12-06 at 11.17.21 AM.png]

Enhancing the API by doing this will result in less code and more readable 
solutions.

Thanks for reading!

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