validate shape of Map

[indeyets]

Currently, I can either validate that something is a Map or that something contains specific keys/values.

Can I do both at the same time?
I want to validate that something is an immutable Map with specific keys, which have values of specific types.

At first, I had an idea that mapOf would do the thing, but it validates each of map's values against pattern.

[sentience]

I have this question too.

[HurricaneJames]

If it contains specific keys/values, then isn't it a Map or a Map descendant by default? What would be the scenario where you want to verify specific key/values and specifically care about the implementing class?

And sorry for the delay. I recently changed jobs and moved from the east coast to the west... ie. I have been a bad project maintainer.

[MatthewHerbst]

You can apply the same logic as used in React PropTypes. Look at this SO question for the how, and refer to #17 for making sure you realize you will get a normal JS type.

[HurricaneJames]

I think the SO question actually references a slightly different problem, ie verifying that something is a Map<string, Object> (map from string to Object). That is an interesting problem, and not one that is handled by this library currently. I would be more than happy to accept a PR for such a feature though.

[MatthewHerbst]

@HurricaneJames to generalize a little more, the SO questions asks about how you can verify type and/or format of the keys of a map, not just the values of those keys.

[hartzis]

please check out PR #24 to see if it fits the requested functionality

[HurricaneJames]

This should be addressed by #24, which has been merged/published as v1.7.0.