将逻辑NOT应用于propEq并在ramda中过滤

Question

I'm feeling my way though functional programming with Ramda and I'm struggling on something sounds like it should be easy.

I want all the entries in an array where a property does not equal a value.

For example in pure js

const filtered = source.filter(entry => entry.name !== 'something');

In Ramda there is a propEq so I can easily get all the elements that do match a value such as

const filtered = R.filter(R.propEq('name','something'),source);

But I can't see how to do the inverse of that, to only return values that do not equal a value.

I'm sure this must be very easy but I'm struggling to see a built in function to do it, the closest I can come up with is:

const others = R.filter(rate => rate.name !== name,res.rates);

But I'm sure there must be a better way?

Answer 1

Yes, Ramda has a reverse of filter called reject :

R.reject(R.propEq('name', 'something'))(source)

You can see this on the Ramda REPL