Removing duplicate array values and then storing them [react]

Question

I\'m trying to strip the duplicate array values from my current array. And I\'d like to store the fresh list (list without duplicates) into a new variable.

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Answer 1

Since I found the code of @Infaz 's answer used somewhere and it confused me greatly, I thought I would share the refactored function.

function getUnique(array, key) {
  if (typeof key !== 'function') {
    const property = key;
    key = function(item) { return item[property]; };
  }
  return Array.from(array.reduce(function(map, item) {
    const k = key(item);
    if (!map.has(k)) map.set(k, item);
    return map;
  }, new Map()).values());
}

// Example
const items = [
  { id: 2, name: "sumit" },
  { id: 1, name: "amit" },
  { id: 3, name: "rahul" },
  { id: 4, name: "jay" },
  { id: 2, name: "ra one" },
  { id: 3, name: "alex" },
  { id: 1, name: "devid" },
  { id: 7, name: "sam" },
];
console.log(getUnique(items, 'id'));
/*Output:
[ 
  { id: 2, name: "sumit" },
  { id: 1, name: "amit" },
  { id: 3, name: "rahul" },  
  { id: 4, name: "jay" },  
  { id: 7, name: "sam" }
]
*/