Using the conditions value in if/else

Question

I'm wondering if it's possible to access a condition's value directly like the following example.

var a = ["pear", "kiwi", "orange", "apple"]
if(a.indexOf("orange") !== -1){
  console.log(this) //as a.indexOf("orange") has been evaluated already above this prints 2
}

This would also make ternary operators less bloaty

var a = ["pear", "kiwi", "orange", "apple"]
var b = ((a.indexOf("orange") !== -1) ? this : '') //"this" equals 2

Thanks

EDIT: Clearing this question up for any future visitors. Basically this question is about retrieving the resulting value of what is evaluated in an if/else statement. In the example of

var a = ["pear", "kiwi", "orange", "apple"]
if(a.indexOf("orange") !== -1){ //is basically if(2 !== -1)
  console.log(this) //would then be "2" from the already evaluted a.indexOf from above
}

Answer 1

You can simply store it before the statement if the goal is to not evaluate twice. The answer to your literal question is no.

const orangeIndex = a.indexOf("orange")

if (orangeIndex !== -1) {
  console.log(orangeIndex)
}

Same concept applies to the ternary operator.

As others have shown, you can also declare a variable and do the actual assignment in the if statement itself, but IMO this makes your code less readable without adding any value.