Multiple effects in `else` using ternary operator

Question

I have the next condition in Java Script:

if(a === 10) {
  getName()
  getLastName()
}

I want to write this code using ternary operator, and i wrote this:

a === 10 && (getName() && getLastName())

But this does not work.
Question: What could be the issue with my code?

"*I want to write this code using ternary operator*" - [don't](https://stackoverflow.com/q/29659521/1048572). Also that's not the ternary conditional operator, it's an AND operator. — Bergi, Jun 01 '20 at 13:00
Is there any possibility that `getName` return empty `string`. In JS empty `string` is considered as false — Math10, Jun 01 '20 at 13:01
@NikitaMadeev, it is a function, does not matter, i tried to simulate my issue. And i want to see if it is possible to add many result in ternary operator, like these 2 functions for example. There could be anything. — Asking, Jun 01 '20 at 13:01
if `getname()` returns `true` only then `getlastname()` would be called - this is what your 1-line code means — Sowjanya R Bhat, Jun 01 '20 at 13:03
The syntax for a ternary operator can easily be found by googling "javascript ternary operator". Please read one of the many explanations and examples available on the web. — LeGEC, Jun 01 '20 at 13:05
This is not a ternary operator. It's not even the conditional operator — VLAZ, Jun 01 '20 at 13:12

score 0 · Answer 1 · answered Jun 01 '20 at 13:02

I want to write this code using ternary operator

That's not a ternary operator (an operator accepting three operands), it's the &&, which is a binary operator (an operator accepting two operands). The only ternary operator in JavaScript right now is the conditional operator (condition ? valueIfTruthy : valueIfFalsy).

The problem is that when you combine things with &&, the right-hand operand is only evaluated if the left-hand operand's value is truthy. I guess getName is returning something falsy, which is why the right-hand operand isn't evaluated (getLastName isn't called). && short-circuits.

Don't rewrite the if. It's perfectly clear and straightforward and easy to debug the way it is. It's not broken.

If you were going to use && instead of if, you'd use the comma operator (a binary operator) for the two operations:

// Please don't do this
a === 10 && (getName(), getLastName());

The comma operator evaluates its left-hand operand, throws the result away, and then evaluates its right-hand operand and takes that result as its result.

But again: Please don't. :-)

@AskMen - That's a completely different question. If you need to return two things from a function, you typically use an object or an array. (That isn't changed by using `&&` instead of `if`.) — T.J. Crowder, Jun 01 '20 at 13:12

Multiple effects in `else` using ternary operator

1 Answers1