Function head

head<T>(fallback): ((list) => T)
Returns the first item in an array, or the fallback if list is null or undefined.
Type Parameters
- T
Parameters
- fallback: T
Returns ((list) => T)
- - (list): T
  - Parameters
    - list: T[]
    Returns T
Example
```
head(99)([3, 6, 9])
// => 3

head(99)(undefined)
// => 99
```
- Defined in lib/fns/array.ts:20

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