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RE: JavaScript - hasOwnProperty in `for-in` loops

in #programming • 7 years ago (edited)

Hi @heejin,

Sorry, I'm confused a little:)
If I never change Object.prototype in my code, should i still check for hasOwnProperty?

I'll might going to use Object.keys() as it is really looks simple but first I want to understand if I'm in danger that something changes my Object without I'm asking for it, or not?

Edit: I got it now, "You can easily modify Object.prototype" So it is me, who accidentally changing it! My question was lame:)

Thanks for sharing!

7 years ago in #programming by
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     7 years ago 

    Yes and for example, If you write an Web Application, then you may use many libraries as dependencies.
    and those libraries could change Object.prototype at anytime. So you'd better to use safer way.

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