Invalid of Broadcast Rules

[JChonpca]

For some dt.Value wrapper, when working with the mathematical operator, the broadcast rules are invalid, resulting in an unintuitive result, and there is no notification for broadcast error.

Example:

1. dt.Value(value=[1, 2, 3]) > dt.Value(value=[1, 2, 3, 4]) —> [False, False, False, False]
2. dt.Value(value=[1, 2, 3]) > dt.Value(value=[1, 2]) —> [False, False, True]
3. dt.Value(value=[1, 2, 3]) ** dt.Value(value=[1, 2]) —> [1, 4, 3]

@BenjaminMidtvedt

[giovannivolpe]

What would be the desired behavior?

[Pwhsky]

With some further testing it appears that the broadcasted values becomes 1.
The following happens:

>>> (dt.Value(value=[1, 2, 3]) > dt.Value(value=[1, 2, 3, 0])).update()()
>>> [False, False, False, True]

>>> (dt.Value(value=[1, 2, 3]) > dt.Value(value=[1, 2, 3, 1])).update()()
>>> [False, False, False, False]

and

>>> (dt.Value(value=[1]) >= dt.Value(value=[3, -2, 0, 1])).update()()
>>> [False, True, False, True]

Do we provide a warning when using broadcasting with boolean operators? I am not sure if there are standard broadcasting rules for boolean operations in the same way we have with matrix operations.