switch
Select one of multiple inputs based on an index.
g.switch(0, [1, 2], [3, 4], [5, 6]);
If the index value is bigger than the number of inputs, it wraps around:
g.switch(4, ['a'], ['b'], ['c']);
The index can also be negative, in which case it will start at the end:
g.switch(-1, ['a'], ['b'], ['c']);
Parameters
index: The item to pick.l1: The first list.l2: The second list....