findArrayUnion()

Step 1: Understand the problem

The first step in writing a function called findArrayUnion in javascript is to understand what the problem is asking for. In this case, we want to write a function that will take two arrays as inputs and return a new array that is a union of the two arrays. The union of the two arrays will include all unique elements from both arrays, without any duplicates.

Step 2: Setting Up the Function

Let's begin by setting up our function findArrayUnion that takes two arrays, array1 and array2, as parameters.

function findArrayUnion(array1, array2) {
}

Step 3: Combining Both Arrays into One

The next step is to combine both arrays into one single array. This can be achieved by using the concat method in JavaScript. This method is used to merge one or more arrays.

function findArrayUnion(array1, array2) {
    let combinedArray = array1.concat(array2);
}

Step 4: Removing Duplicates

Now we have a combined array, but it may contain duplicates. To remove the duplicates we'll take advantage of Set in JavaScript. A Set is a collection of unique values. So, we create a Set from our combinedArray, effectively removing duplicates, and then convert back to an array using the Array.from() method.

function findArrayUnion(array1, array2) {
    let combinedArray = array1.concat(array2);
    let uniqueArray = Array.from(new Set(combinedArray));
}

Step 5: Return the Result

Finally, we need to return the uniqueArray from our function so that it can be used elsewhere in our program.

function findArrayUnion(array1, array2) {
    let combinedArray = array1.concat(array2);
    let uniqueArray = Array.from(new Set(combinedArray));
    return uniqueArray;
}

Conclusion

There you have it, a JavaScript function that accepts two arrays and returns their union. Remember, the union of two (or more) sets is a set that contains all of the unique elements of those sets. So this function will combine two arrays while eliminating any duplicate values. Thanks to concat for merging arrays and Set for ensuring uniqueness, our findArrayUnion function can accomplish this in a few lines of code.