Function pipe4

pipe4<E>(fallback): (<A, B, C, D>(fns) => ((x) => E))
Compose an array of exactly 4 functions from top to bottom (left to right).

Returns the fallback if x is null or undefined.
Type Parameters
- E
Parameters
- fallback: E
Returns (<A, B, C, D>(fns) => ((x) => E))
- - <A, B, C, D>(fns): ((x) => E)
  - Type Parameters
    - A
    - B
    - C
    - D
    Parameters
    - fns: [Unary<A, B>, Unary<B, C>, Unary<C, D>, Unary<D, E>]
    Returns ((x) => E)
    - - (x): E
      - Parameters
        
        x: A
        
        Returns E
See
pipe2, pipe3

Example
```
pipe4('fallback')([x => x / 2, y => y.toString(), z => [z, z], w => w.join('/')])(42)
// => "21/21"

pipe4('fallback')([x => x / 2, y => y.toString(), z => [z, z], w => w.join('/')])(undefined)
// => "fallback"
```
- Defined in lib/fns/pipe.ts:72

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