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JavaScript JavaScript Functions Create Reusable Code with Functions Using Multiple return Statements

Posted by Oksana Koyfman
Oksana Koyfman
10,521 Points

Why we don't simply return !field.value?

Instead of conditional statement I'd simply return !field.value. Is this solution was provided because of readability issue? There are few ways to solve it then. Let's say to declare const fieldIsEmpty = !field.value; return fieldIsEmpty. Am I missing something?

2 Answers

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

You can optimize it even further by omitting the variable entirely:

    return !field.value;

The sample optimizations shown in the video aren't intended to be the only ones possible. The fact that you're spotting even more compact/efficient solutions is a good indication of your learning progress and grasp of the material! :+1:

Zimri Leijen
Zimri Leijen
11,835 Points
Zimri Leijen
Zimri Leijen
11,835 Points

That would have side effects.

any "falsey" value would be considered empty. For example the value 0 would be falsey, and therefore considered empty.

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

Since "value" is a string, it can't have the value 0. Only an empty string would appear "falsey".

Zimri Leijen
Zimri Leijen
11,835 Points

as long as you can be sure that the value indeed always will be a string