double bang performance scenario

Asked Mar 27 '23 at 17:38

Active Mar 27 '23 at 17:38

Viewed 29 times

Just wondering if there is any benefit (performance or otherwise) to using double bang in this scenario:

const isUser = users && !!users.find((u) => u.id === '123')

if(isUser) {
 console.log('is user')
}

Does it make sense to use double bang here? Wondering if converting it from a user object to boolean has any benefits when checking it with if(isUser)

asked Mar 27 '23 at 17:38

Grambam

See [Why use double exclamation marks in an if statement?](https://stackoverflow.com/questions/52230490/why-use-double-exclamation-marks-in-an-if-statement) – Unmitigated Mar 27 '23 at 17:40
In that scenario, they are asking if it is worth using !! on a variable that is already a boolean, bit different – Grambam Mar 27 '23 at 17:43
No, read the second half of the question. – Unmitigated Mar 27 '23 at 17:43
My mistake, thanks. Care to add that to the answer? – Grambam Mar 27 '23 at 17:45
4

Why are you reinventing `some` or `every`? – epascarello Mar 27 '23 at 17:49
Performance can be benchmarked. Did you? – trincot Mar 27 '23 at 19:18

double bang performance scenario

0 Answers0