### checkProp

Given a `predicate` function and a `prop` string this curried function will then take an `object` to inspect by calling the property and passing it to the predicate.

It summons `prop` on `obj` and passes it to a provided `predicate` function and returns a masked boolean

```js
const checkProp = (predicate, prop) => obj => !!predicate(obj[prop])
```

```js
const lengthIs4 = checkProp(l => l === 4, 'length')
lengthIs4([]) // false
lengthIs4([1,2,3,4]) // true
lengthIs4(new Set([1,2,3,4]) // false (Set uses Size, not length)

const session = { user: {} }
const validUserSession = checkProps(u => u.active && !u.disabled, 'user')

validUserSession(session) // false

session.user.active = true
validUserSession(session) // true

const noLength(l => l === undefined, 'length')
noLength([]) // false
noLength({}) // true
noLength(new Set()) // true
```