This guide explains JavaScript’s filter method and how to use it to filter arrays containing numbers, strings, and even objects. What Is the JavaScript filter Method? In JavaScript, arrays each come with a filter method, which can be used to generate a new array from the original given a...
Basic filter() usage example The following example demonstrates how to usefilter()to retrieve all of the even numbers from a given array: const nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; const evenNums = nums.filter(num => num % 2 === 0); console.log(evenNums); //Expect...
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Thefilter()method creates a brand new array with those elements that have passed a test function. ADVERTISEMENT Use thefilter()Method to Filter an Array by Checking Multiple Values in JavaScript For instance, we will retrieve the student’s records whose last name starts withMand enroll in at ...
How the JavaScript map() function compares to using for loops and theforEachfunction When and why to use the JavaScript map() function Note The JavaScriptmap()method is not the same as theJavaScriptMapobject, which stores an ordered sequence of key-value pairs. ...
How to Use the FILTER Function in Excel: 10 Ideal Examples To demonstrate the examples, we consider a dataset of10students of an institution. Their ID, name, department, enrolled semester, and the amount of CGPA are in the range of cellsB5:F14. ...
JavaScript How to filter out Non Unique Values from an Array - To filter out non-unique values from an array in JavaScript, you can use the filter() method, a for loop, the set and filter() method, and the reduce() method. In this article, we will filter
Use theindexOf()Method With thefilter()Method to Filter String in JavaScript We will work on the same categorized string array with multiple string elements. In this case, we will choose a pattern of string that we want to match with our given string, and whichever string is the superset ...
Forgetting to use the'return'keyword. If you forgot to use thereturnkeyword in your filter function, the result will be undefined. Frequently Asked Questions What does the JavaScript array filter() method do? The filter() method in JavaScript creates a new array only with elements that pass ...
How to use polyfill in JavaScript - The developers of JavaScript always keep adding new features to the JavaScript language to improve performance and add better functionalities. Sometimes, it happens that new features don’t support by the old browser v