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Apu April 09, 2023 › #Array #HowTo

How to create an array of objects from multiple arrays

To create an array of objects from multiple arrays , you can use the map() method to iterate over one of the arrays and create a new object for each element.

Inside the callback function, you can use the current index to access the corresponding elements from the other arrays and use them as values for the keys in the new object.

The example is given below.

<script>
    let names = ["Red", "Yellow", "Black"]; 
    let codes = ["#ff0000", "#ffff00" , "#000000"];  
    
    let results = ["0", "1", "2"];

    const newArray = results.map((result, index) => {
        return {
          results: results[index],
          name: names[index],
          code: codes[index]
        };
    });

    console.log(newArray)
</script>
Output is :
[
  { results: '0', name: 'Red', code: '#ff0000'},
  { results: '1', name: 'Yellow', code: '#ffff00'},
  { results: '2', name: 'Black', code: '#000000'}
]
  1. Start by identifying the arrays that you want to combine. In this case, we want to combine multiple arrays to create an array of objects.
  2. Decide on the structure of the objects you want to create. This could be based on the data you have in your original arrays, or you may want to define a new structure.
  3. Use the map() method to iterate over one of the arrays. This will create a new array with the same number of elements as the original array.
  4. Inside the map() callback function, create a new object using the structure you defined earlier. You can use the current index of the map() iteration to access the corresponding elements of the other arrays.
  5. Assign values to the keys in the new object using the elements you accessed in step 4.
  6. Return the new object from the map() callback function.
  7. Save the new array of objects that was created in step 3 to a variable.
  8. You now have an array of objects created from multiple arrays!
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