arraymancer function apply

[shallowHal]

Is it possible in arraymancer to apply a function over slices along an axis? 
For example 
    
    
    let t = [1,2,3,4].toTensor().reshape(2,2)
    assert t.map(max, axis=1) == [2,4].toTensor().reshape(1,2)
    
    
    Run

`reduce` does something along these lines, but sums up the results