# The `Array.reverse` function

## Returns correct result

### Juttle

    emit -from Date.new(0) -limit 1 | put array = ['a','b'] | put result = Array.reverse(array) | view result

### Output

    { "time": "1970-01-01T00:00:00.000Z", result: ["b", "a"], array: ["b", "a"] }

## Produces an error when passed an argument of incorrect type

### Juttle

    emit -from Date.new(0) -limit 1 | put result = Array.reverse(null) | view result

### Warnings

  * Invalid argument type for "Array.reverse": expected array, received null.