a = 0
b = Array{typeof(a),1}(2)
@show b
b[1] = a
@show b
a = 1
b[2] = a
@show b;

a = [0,0]
b = Array{typeof(a),1}(2)
@show b
b[1] = a
@show b
a = [1, 2]
b[2] = a
@show b;

a = [0,0]
b = Array{typeof(a),1}(2)
@show b
b[1] = a
@show b
a[1], a[2] = 1, 2
b[2] = a
@show b;

a = [0,0]
b = Array{typeof(a),1}(2)
@show b
b[1] = copy(a)
@show b
a[1], a[2] = 1, 2
b[2] = a
@show b;

a = [0,0]
b = Array{eltype(a),2}(2,2)
display(b)
b[:,1] = a
display(b)
a[1], a[2] = 1, 2
b[:,2] = a
display(b);