Function contains

contains<V>(
    haystack: ArrayLike<V>,
    needles: ArrayLike<V>,
    eq?: (a: V, b: V) => boolean,
): boolean
Returns true if all value in needles is contained in haystack.
```
const a = ['apples','oranges','pears','mandarins'];
const b = ['pears', 'apples'];
contains(a, b); // True

const c = ['pears', 'bananas'];
contains(a, b); // False ('bananas' does not exist in a)
```
If needles is empty, contains will return true.
Type Parameters
- V
Parameters
- haystack: ArrayLike<V>
  Array to search
- needles: ArrayLike<V>
  Things to look for
- eq: (a: V, b: V) => boolean = ...
  - (a: V, b: V): boolean
    Default comparer function is equiv to checking a === b. Use isEqualValueDefault to compare by value, via comparing JSON string representation.
    
    Parameters
    a: V
    b: V
    Returns boolean
Returns boolean
- Defined in contains.ts:22