New to Julia / lost in translation / how to index a simple 2d-array of strings

[aramirezreyes]

As mentioned by @mcabbott:

@mcabbott

@fins

I’m expecting to index into DISPLAY_SQUARE[i1][i2]

Note that this won’t work. It will need to be DISPLAY_SQUARE[i1, i2] if you have a matrix, as this is distinct from a vector of vectors.

To index into a matrix you need to do Matrix[i1,i2], to index into a 3d array you need to do array[i1,i2,i3] etcetera.

You still can index using only one index, as you point out. This is called linear indexing. But doing Matrix[i1][i2] is not what you want.

You can take a look at what the docs say about how to index here.

So if you do SQUARE[4][2] you are going to the 4th element of the array (or equivalently the element [2,2]). This element is composed of three symbols |,O, and |. And you are indexing into the second element of this string, which is the character “O”.