How can we eliminate identical elements from an array in JavaScript and increment the count of other objects?

I currently have 1 object retrieved from local storage, but it seems to contain some duplicates. What is the easiest way to remove these duplicates?

The array object I am working with is called "mainchart".

function check() {
  for (let i = 0; i < mainchart.length; i++) {
    for (let j = i + 1; j < mainchart.length; j++) {  
      if (mainchart[i].id === mainchart[j].id) {
        console.log(mainchart[i], mainchart[j]);
      }
    }
  }
}

check();

Answer №1

If you're looking to eliminate duplicate values from an array, one simple method involves converting the array into a set (which only contains unique values) and then transferring those unique values into a new array:

const originalArray = ["apple", "banana", true, 5, 82, true, "apple"];

const uniqueArray = [...new Set(originalArray)];

console.log(uniqueArray); // [ 'apple', 'banana', true, 5, 82 ]

I hope this solution proves helpful to you 🌟

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