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

If you can't wrap your head around list and array data types, can you really learn to code (and is it worth going to bootcamp)?

• I've got basic Javascript down, can create loops, if/else etc. But I hit this and my head explodes, especially the exercises at the bottom. Lists (objects nested in objects), recursive functions, etc. http://eloquentjavascript.net/2nd_edition/preview/04_data.html Can you write arrayToList, listToArray, prepend, and nth? I've done all three JS tracks on Code School, JS on Codecademy, and read a bunch of other material, but I've been wrestling with this for hours. console.log(arrayToList([10, 20])); // → {value: 10, rest: {value: 20, rest: null}} console.log(listToArray(arrayToList([10, 20, 30]))); // → [10, 20, 30] console.log(prepend(10, prepend(20, null))); // → {value: 10, rest: {value: 20, rest: null}} console.log(nth(arrayToList([10, 20, 30]), 1)); // → 20

• Answer:

  To briefly answer your question: Yes, you can. The fact that you've been trying this for hours and have resorted to Quora is proof that you have what it takes. That is the hardest part of our field: long hours of getting nowhere and not giving up. It happens to even the most experienced and brightest programmers, and usually at that point it's a good idea to ask someone else for help, as you did :) To give you my own example: I learned C++ at age 15, did a CS degree from a top school, worked at a successful startup and now am at one of the top rated places to work. When I first started off, I had so much trouble understanding the concepts that I literally broke into tears several times. I used to wonder whether a time would come when I would be able to program with ease. Let me tell you: The time will come. Now, to answer your specific question: With data structures, you really have to draw out some diagrams with pen and paper. Draw out an array (your input) and then the steps it would take to turn it into a linked list (called a list in that problem). Also, a heads up for this specific problem: You'll have to create a brand new Object (or dict, doesn't matter) for each element of the input array. So, rather than modifying the input array, you will create new Objects, link them together, and return them. The way to return them is by returning the first object in the list, the "head" if you will. That's because the other objects can be obtained by simply calling .next on the head Object, and the one after that, and so on. Also, this is a problem you'd typically solve in a 2nd-year CS course called Data Structures. Great job on getting so far, and you saved $30k too. Keep it up!