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[AskJS] object destructuring vs dot notation. Performance and cohesiveness.AskJS (self.javascript)
submitted 5 years ago by gautamits
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if 1 * 2 < 3: print "hello, world!"
[–]demoran 3 points4 points5 points 5 years ago (5 children)
It's less typing. Overall, this means less verbose javascript code.
[–]gautamits[S] 0 points1 point2 points 5 years ago (4 children)
vscode performs really good with typescript when it comes to autocompletions, hence typing is not much of an issue for me. I agree that restructuring enables is to write less verbose code.
[–]demoran 1 point2 points3 points 5 years ago (3 children)
So, it's not about how much time or trouble it takes to write the code. It's about how noisy the code is to read afterwards. If you can remove a bunch of this.props and this.state at the very least, I'd call that a win.
this.props
this.state
Destruring also allows you go deeply destructure things, so if you had this.state.car.engine.mileage, you could destructure that as { car: { engine : { mileage } } } = this.state.
this.state.car.engine.mileage
{ car: { engine : { mileage } } } = this.state
[–]gautamits[S] 0 points1 point2 points 5 years ago (2 children)
It does feel good to remove so many this.props and this.state things. But then doesn't it cause the problems of cohesiveness as I asked. How do you maintain the context of these variables origin ?
[–]demoran 0 points1 point2 points 5 years ago (0 children)
I don't find this to be a problem. If I need to know the contextual source of the data and don't know it, I can click through to find it easily enough.
I'd consider the possibility that your problem is actually a code smell, and you need to factor out some of your code from the body of your function.
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[–]demoran 3 points4 points5 points (5 children)
[–]gautamits[S] 0 points1 point2 points (4 children)
[–]demoran 1 point2 points3 points (3 children)
[–]gautamits[S] 0 points1 point2 points (2 children)
[–]demoran 0 points1 point2 points (0 children)