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並前往https://dev.to/ethanarrowood/which-is-faster-objhasownpropertyprop-vs-objectkeysobjincludesprop-5704

Which is faster: obj.hasOwnProperty(prop) vs Object.keys(obj ...

Tagged with javascript, discuss. ... Given an object with n properties (also called keys) is it faster to ... I bet it has to be Object.

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