Immutable-js: Map.selectKeys

[OliverJAsh]

I believe I want something like Clojure’s select-keys.

The mutable JS equivalent (using Lodash):

var foo = { bar: 0, baz: 0 };
_.pick(foo, 'bar'); // => { bar: 0 }

I can't see anything like this on Immutable.Map, but I could be mislead – this is my first time using immutable data structures.

[tgriesser]

Check out https://github.com/facebook/immutable-js/wiki/Predicates#pick--omit

[leebyron]

Thanks @tgriesser

[glenjamin]

Personally I think this is common enough to be a first-class API.

Especially as when picking keys from an existing object, we should only need to iterate over the keys to pick.

[kendagriff]

+1 to making it first-class.