Function compose2

compose2<R2>(fallback): (<T, R1>(fns) => ((x) => R2))
Compose an array of exactly 2 functions from bottom to top (right to left).

Returns the fallback if x is null or undefined.
Type Parameters
- R2
Parameters
- fallback: R2
Returns (<T, R1>(fns) => ((x) => R2))
- - <T, R1>(fns): ((x) => R2)
  - Type Parameters
    - T
    - R1
    Parameters
    - fns: [Unary<R1, R2>, Unary<T, R1>]
    Returns ((x) => R2)
    - - (x): R2
      - Parameters
        
        x: T
        
        Returns R2
See
compose3, compose4

Example
```
compose2('fallback')([y => y.toString(), x => x / 2])(42)
// => "21"

compose2('fallback')([y => y.toString(), x => x / 2])(undefined)
// => "fallback"
```
- Defined in lib/fns/compose.ts:22

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