var obj = {type: "beetle", price : "xxx", popular: "yes" ,.... };
If I want to remove all the properties from obj, what is the correct way to do it?
Should I use
delete obj.type; delete obj.price; delete obj.popularOr should I set obj = null;?
Or will letting obj go out of scope automatically delete the properties?
According to MDN, the JavaScript delete operator is used to remove a property from an object, and if there are no more references to that property, it will be automatically released.
It's important to note that setting an object to null is a completely different concept than using the delete operator. Additionally, trying to access a non-existent property like 's' will not work because it does not belong to any object.
If you assign a property the value of null, it remains in existence without any defined value. However, if you delete the property entirely, it will cease to exist within the context.
There is a distinct difference between deleting the car property of object s and assigning it as null. Even though deleting the property leaves s as an empty object, it still retains its status as an object which can access certain methods like s.toString() and s.hasOwnProperty(propname). On the other hand, assigning null to s turns it into a primitive value with limited capabilities - you cannot call any methods on it. Additionally, an empty object like {} evaluates to true when coerced to Boolean, while null evaluates to false.
Therefore, it is clear that these values behave in very different ways.
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