4 ms·

This covers most of the weirdness with primitive types, but then we have an oddly designed OO system on top of that: prototypes + `this` and constructors + clas

• sesm 5y ago
  It may seem odd, but it got clear to me once I understood the basic idea. In a language like Java you have objects and classes at the bottom of the language. How would you add maps to the language? Well, you create a Map class, implement put, get, has methods, etc. Now imagine a language where you have functions and maps as your basic primitives, but you don't have classes and objects. How do you add objects and classes to the language? You can do something like this: objects are maps, information about their basic class is saved in 'prototype' property, constructor is a function that returns an object, etc. That's how JavaScript works. You can read about this in more details here https://exploringjs.com/impatient-js/ch_proto-chains-classes.html https://exploringjs.com/impatient-js/ch_proto-chains-classes... , if you keep the basic idea in mind the details are easy to follow.