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reject 

        # Array.reject

(from ruby core)
---
    array.reject {|element| ... } -> new_array
    array.reject -> new_enumerator

---

Returns a new Array whose elements are all those from `self` for which
the block returns `false` or `nil`:
    a = [:foo, 'bar', 2, 'bat']
    a1 = a.reject {|element| element.to_s.start_with?('b') }
    a1 # => [:foo, 2]

Returns a new Enumerator if no block given:
    a = [:foo, 'bar', 2]
    a.reject # => #<Enumerator: [:foo, "bar", 2]:reject>

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