TL;DR, answer: to get a 2x1 Array/Matrix transpose a 1x2 matrix, for example: `[2 4]'`

A more general solution that also works for complex numbers in Julia V0.7- would be `transpose([2 4])`

I wanted to test

```
julia> maximum([1 2; 3 4], 2)
2×1 Array{Int64,2}:
2
4
```

So I tried

```
julia> maximum([1 2; 3 4], 2) == [2;4]
false
```

I expected the value to be true, but the value is false because

```
julia> [2;4]
2-element Array{Int64,1}:
2
4
```

That is, a 2×1 Array{Int64,2} is not the same as a 2-element Array{Int64,1} (2D vs 1D)

However,

```
julia> [1 2; 3 4]
2×2 Array{Int64,2}:
1 2
3 4
```

So [2;4] (note the semicolon) seems the proper way to get a 2×1 Array{Int64,2} 2-dimensional array.

What am I missing?