js filter array | BTCC Knowledge

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What is filter array method in JavaScript?

In this article, you learned about the filter () Array method. For more details, consult the MDN Reference on filter (). Filter is only one of several iteration methods on Arrays in JavaScript, read How To Use Array Iteration Methods in JavaScript to learn about the other methods like map () and reduce ().

How do I filter an array using a static method?

You can then use the filter () method to filter through the array and return a new array of filtered elements. Let's say you have an object that holds users' details like name, age and occupation. These object static methods can return the keys, values or each key-value pair as an array.

How to filter through an array using ES6?

Now, this works alright. But a better way to filter through an array is to use the ES6 filter () method. The filter () method is an ES6 method that provides a cleaner syntax to filter through an array. It returns new elements in a new array without altering the original array.

What is the purpose of the array filter() function?

The array.filter () function is a pure function because it does not modify the existing array; instead, it creates a new array and then returns that newly created array with the filtered values. Let’s see an example to understand the filter () method.

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