數組連接數組

Question

我在Julia有一個數組數組，我試圖找到將所有元素連接在一起的方法。如果我創建陣列並將它們分別輸入到hcat()中，它將按照我的意願執行。但是，如果我創建數組，然後將數組數組提供到hcat()，它將失敗。我可以寫一個循環來成功連接一個數組到另一個數組，但我想知道是否有更好的方法。

a = ones(2,2); 
b = ones(2,2); 
c = ones(2,2);  

hcat(a,b,c) ## Does what I want by creating a single array. would be impracticable though for large number of objects. 

d = Array(Array{Float64,2}, 3); 
d[1] = a; 
d[2] = b; 
d[3] = c;  

hcat(d) ## Still leaves me with an array of arrays, like before  

[a b c] ## also does what I want 
[f for f in d] ## Still leaves me with an array of arrays 

Answer 1

julia> hcat(d) 
3x1 Array{Array{Float64,2},2}: 
2x2 Array{Float64,2}: 
1.0 1.0 
1.0 1.0 
2x2 Array{Float64,2}: 
1.0 1.0 
1.0 1.0 
2x2 Array{Float64,2}: 
1.0 1.0 
1.0 1.0 

julia> hcat(d...) 
2x6 Array{Float64,2}: 
1.0 1.0 1.0 1.0 1.0 1.0 
1.0 1.0 1.0 1.0 1.0 1.0