Problem with arrays

[Vegz78]

Hi @Sarge,

I was trying to add two arrays together without using 2 loops and still keep the original array intact(copy).

I found out from one of your earlier posts that this was possible with concat():

Anyone know how to join two arrays together?

I know it’s kind of late, but JavaScript has a convenient Array.prototype.concat() method. It returns a value without modifying the original array. Given array1 = [1, 2] & array2 = [3, 4]: let array3 = array1.concat(array2); ‘array3’ will be defined as [1, 2, 3, 4] (this method is stackable, so you can do array1.concat(array2).concat(array3)... In blocks you need to write your own method, as one is not in place. You could implement it something like this (pseudocode) : function add_arrays…

Still, I have not found out how to do this with only blocks/without grey blocks…

Here, illustrated with the functions AddList_loop(), AddList_no_lopp() and AddList_reference(), which are 2 loops, concat and same as yours above, respectively:

ListAdd

As you can see, in the last one - AddList_reference() and the same as yours above -, result seems only to be a reference to array1 via the parameter list1, and the original array1 is overwritten.