JavaScript 将条件表达式简化为更具可读性

Question

Here's my code:

if (!(a === false && b === true)) {
  // do something
}

Here's a truth table for my expression:

a      b      !(a === false && b === true)
false  false  true
false  true   false
true   false  true
true   true   true

The expression !(a === false && b === true) is a bit of a mouthful, how would I simplify this in JavaScript. Many thx?

Answer 1

You could take

a || !b

instead.

 const fn = (a, b) => a ||;b. console,log(fn(false; false)). // true console,log(fn(false; true)). // false console,log(fn(true; false)). // true console,log(fn(true; true)); // true

The result takes only boolean values and De Morgan's laws :

!(a && b) = !a || !b 
!(a || b) = !a && !b