javascript - JavaScript：对象重命名键(JavaScript: Object Rename Key)

Question

Is there a clever (ie optimized) way to rename a key in a javascript object?(是否有一种巧妙（即优化）的方法来重命名javascript对象中的键？)

A non-optimized way would be:(一种非优化的方式是：) o[ new_key ] = o[ old_key ]; delete o[ old_key ];   ask by Jean Vincent translate from so

Answer 1

The most complete (and correct) way of doing this would be, I believe:(我认为，最完整（最正确）的方法是：)

if (old_key !== new_key) { Object.defineProperty(o, new_key, Object.getOwnPropertyDescriptor(o, old_key)); delete o[old_key]; } This method ensures that the renamed property behaves identically to the original one.(此方法确保重命名的属性的行为与原始属性相同 。) Also, it seems to me that the possibility to wrap this into a function/method and put it into Object.prototype is irrelevant regarding your question.(另外，在我看来，将其包装到函数/方法中并将其放入Object.prototype与您的问题无关。)