get only the unique value of an array

Question

I am new to javascript and I tried like using distinct but its not what im looking for

example array:

let arr = [ {key:\"1\",value:\"dog\"},
                 


        

Answer 1

Using the "find" method, you will get exactly what you are looking for "{key:"2",value:"cat"}".

arr.find((item, index) => {
  const foundDup = arr.find((s, sIndex) => sIndex !== index && s.key === item.key);
  return !foundDup;
});