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In the following coding snippet, you will see a quick example of how to get the intersection of two arrays:
Using a similar syntax, you can also check for the difference between arrays to know the elements that are not in
This time, we are going to use a for loop to iterate over an array to implement an array intersection and obtain every element in the first array. Then, it uses another method called
includes() to verify if each element in the first array is included in second one.
In addition, another way of using a for loop to get the same exact result but without using the
includes() method is using a nested for loop.
Set objects are collections that do not allow duplicated elements to be stored, hence each element inside will be unique. In this form it is possible to identify the array intersection by removing duplicates.
Imagine that you are developing a website that will offer a search bar as a component for your visitors to find products easily by typing the name. Your objective is to implement an auto-complete feature that suggests search terms to users based on the keywords that have been looked up by other users in the past while navigating that website. So, how can you use arrays intersection to get this goal?
First, you can store various words that users have looked up in the past.
Then, take the input typed by the user in the search bar.
Having both the array with all the values and the user input, you can apply an array intersection to auto-complete what the user is typing.