The Joys Of Boolean Logic

Jen McCown explains boolean logic via truth tables:

t’s really fine if all the circuitry and algebra stuff makes no sense to you. We’re going to use a tried-and-true method to figuring out how these things will come out.

For a truth table, you just put in every combination of input types – meaning, inputs that will evaluate to true, and those that evaluate to false – and work out how the clause will evaluate it overall.

What do I mean? Well, we have two inputs for the questions above: StatusID and UserForeignID, which I’ll shorten to ID and ForeignIDto save characters. Logically speaking:

  • ID can either be equal to 1, or to a value other than 1.

  • ForeignID can either be equal to TD75R, or to a value other than TD75R.

A logic course is particularly helpful in these cases, but start by reading the whole thing.

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