check: function 'check'
In ruleR: Generating numeric sequence items for intelligence tests

check if generated sequence is constant, or has elements greater/smaller than the limit set by user.

1	check(items,result,element_range)

`items`	a list of already generated items
`result`	numeric sequence that is to be checked
`element_range`	maximum and minimum values of elements of the numeric sequence

Function compares result with elements of list items that have the same length as 'result' argument

check outputs a list:

`$result`	numeric sequence that is later added `items` matrix in `automaticTest`
`$fun`	rule used to create the `$result` functioned that is later saved to `rules` list in `createTest`