Conditional xor should work like this: true xor false = true true xor true = false false xor true = true false xor false = false But this is how the != operator actually works with bool types: (true != false) // true (true != true) // false (false != true) // true (false != … Read more
Here are a couple of guidelines: Boolean operators are usually used on boolean values but bitwise operators are usually used on integer values. Boolean operators are short-circuiting but bitwise operators are not short-circuiting. The short-circuiting behaviour is useful in expressions like this: if x is not None and x.foo == 42: # … This would … Read more
XNOR is simply equality on booleans; use A == B. This is an easy thing to miss, since equality isn’t commonly applied to booleans. And there are languages where it won’t necessarily work. For example, in C, any non-zero scalar value is treated as true, so two “true” values can be unequal. But the question … Read more
A bool may only be true or false in C++. As such, using &= and |= is relatively safe (even though I don’t particularly like the notation). True, they will perform bit operations rather than logical operations (and thus they won’t short-circuit) but these bit operations follow a well-defined mapping, which is effectively equivalent to … Read more
The shorter ones are vectorized, meaning they can return a vector, like this: ((-2:2) >= 0) & ((-2:2) <= 0) # [1] FALSE FALSE TRUE FALSE FALSE The longer form evaluates left to right examining only the first element of each vector, so the above gives ((-2:2) >= 0) && ((-2:2) <= 0) # [1] … Read more
Do: var isTrueSet = (myValue === ‘true’); using the identity operator (===), which doesn’t make any implicit type conversions when the compared variables have different types. This will set isTrueSet to a boolean true if the string is “true” and boolean false if it is string “false” or not set at all. Don’t: You should … Read more