Array to Set JavaScriptWhat is an Array in JavaScript?In JavaScript, an array is an object that contains a collection of data types that is similar to each other. In other words, an array is a collection of similar data types that is used to store the values or elements. With the help of an array in JavaScript, we can organize similar types of data and store it. In JavaScript, the first detail of the array is at index zero, and the second element is at index 1 and it goes so on. Syntax What is a Set in JavaScript?In JavaScript, a set is a data object that holds a collection of unique values. In a set, we cannot contain the duplicate values or elements but we can store any type of data. In JavaScript, if we have a duplicate or equal value in a set then only the first instance will be saved in the set. In other words, a set is an object that allows us to store the unique values and no element can be repeated. Syntax How to Convert Array to Set in JavaScript?In JavaScript, if we want to convert array to set then we need to use some methods. Some methods are as follows:
Using map () and add () methodsIn JavaScript, with the use of the map () method, we can call a function once for each element without changing the array that is originally present, and with the use of the add () method we can append an element with the value that is specified. Syntax Let's take an example to understand how the map () method and add () methods work in JavaScript: Example: Example In the above example, we created an array and after that, we used the map() method to create an array of elements to add to the set then created a new set and used the add() method to add each element to the set. After all this, we printed the converted array to set in the browser console. Output: Using the reduce () methodIn JavaScript, with the use of the reduce () method we can execute a function for array elements so we can return the compressed value. n JavaScript, we can apply the reduce () method by passing the value referring to the array element to the created set. Syntax Let's take an example to understand how the reduce () method works in JavaScript: Explanation In the above example, we created an array with integers and strings and displayed it. After we created a set used the reduce () method and passed the value item to the add method referring to the created set. It will result in compressing the created array into the individual set values. Output: Using Spread() OperatorIn JavaScript, the spread operator is used so we can copy all or some parts of the array into another array. In other words, the spread operator gives us access to the inside of iterable objects. In JavaScript, the iterable item is anything we can iterate over object via object like arrays, object literals, and strings. Example Let's take an example to understand the spread operator in detail with the help of this program. Explanation In the above example, we created an array after creating the array we used the spread operator to spread the array into a new set and print the output with the use of a console log. Output: Benefits of Converting Array to SetsConverting array to sets offers several advantages in JavaScript Development. Elimination of duplicate elements In JavaScript, sets automatically removes the duplicate elements and ensure the data integrity. Improved performance In JavaScript, sets provide faster access and lookup times compared to arrays, especially for larger collections. Simplified data manipulation In JavaScript, Sets offer us various built-in method for set operations such as union, intersection and difference. Next TopicBest Source for Learning JavaScript |