Concat with an object not working

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@Eyetoof

… where concat() is not happy.

concat() / Reference

When using an array of objects, the data returned from the function must be cast to the object array’s data type.
For example: SomeClass[] items = (SomeClass[]) concat(array1, array2);.

If you dislike using the (cast) operator for concat() I can write for you a version that doesn’t need it like I did for append():

Unable to append to an array of G4P objects

Using (cast) is indeed not ideal. If you wish, you can override append() pasting the 3 methods below on your sketch, so (cast) isn’t needed anymore: static final <T> T[] expand(final T[] list) { return expand(list, list.length << 1); } static final <T> T[] expand(final T[] list, final int newSize) { return java.util.Arrays.copyOf(list, newSize); } static final <T> T[] append(final T[] list, final T value) { final T[] arr = expand(list, list.length + 1); arr[arr.length - 1] = va…