maybe it's stupit question :)
but it's quite convenient for me in my case. anyone know how to union two
array which have same structure into one array.

for example:
array1 = ( (1,1),(1,2),(1,3))
array2 = ((2,1),(2,2))

I wanna get a new array like that
array3 = ( (1,1),(1,2),(1,3),(2,1),(2,2))

thanks in advance :)