How can I remove duplicate Objects from array of Objects in javascript?

Why aren't rich data structures present in most JavaScript applications? Does the lack of a static type system discourage people from developing a rich set of concepts in JavaScript?

• JavaScript is a loosely typed programming language which doesn't foster a strong opinion on types, which means programmers can't define a class of data type but object prototype, in which manner developers define objects, not types. This seemingly design flaw actually raised OO to a new height by the evident presence of prototypical inheritance comparing to class-based systems. JavaScript is the most object-oriented language. But the question is can we build really useful data abstractions on top of all these "good parts"? Let's take Java as a reference. The native language constructs for composing data structures are fairly simple and similar to those in JavaScript, which is Object (class-based) and Array. But the additional collection framework in JDK tremendously helps Java developers to process data and build even more powerful data abstractions. The same philosophy should have applied to the JavaScript world as well. But never have we ever seen any effort in making this happen. People ended up with house-made objects and picking various libraries within which the same development efforts on data structures were paid over and over. So these are the real questions: Would it help to build and standardize rich data structures like those done in Java collections framework? If we really need rich data abstractions, how can we build it in the weakly-typed JavaScript?

• Answer:

  If you want my opinion, it's so painful in JS that it's not worth doing. And yes, the reasons are essentially the type system, and dynamic typing. But many other popular languages have the same flaw.