MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Array › filter
Array.prototype.filter() - JavaScript | MDN
December 13, 2025 - The filter() method of Array instances creates a shallow copy of a portion of a given array, filtered down to just the elements from the given array that pass the test implemented by the provided function.
Mike Bifulco
mikebifulco.com › home › javascript tips: using array.filter(boolean)
JavaScript Tips: Using Array.filter(Boolean) | Mike Bifulco
November 12, 2021 - We're using a function built into arrays in JavaScript, called Array.prototype.filter, which creates a new array containing all elements that pass the check within the function it takes as an argument.
Is there a way to filter this array twice without creating an extra variable?
Yes. Use &&. const filtered = myArray.filter((value, index, array) => { return value % 2 === 0 && array.indexOf(value) === index; }); More on reddit.com
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February 2, 2017[AskJS] Lazy alternative for Array.filter() and co?
I imagine people who are against lodash are just against lazy alternatives in general. Dev time is more valuable to me than squeezing out a couple cycles more of performance. If you’re in the same mindset as well, just use lodash. Also, lodash is actually really performant. The people who work on it knew what they were doing. Odds are that those extra cycles are going to be non-trivial to squeeze out and difficult to read anyway. Seriously just use lodash. Edit: punctuation and disclaimer More on reddit.com
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March 17, 2019What's the best/fastest way to filter a long array containing 20k objects?
Build an index or trie. Or try a js search engine. More on reddit.com
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August 3, 2017how to filter array of Objects on keyup?
Questions and posts about frontend development in general are welcome, as are all posts pertaining to JavaScript on the backend. ... I want to build search functionality using ES6 syntax (maybe .filter() ?) and need a little help. I have a input box and on 'keyup' I want to loop through my array of ... More on reddit.com
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September 29, 2019Videos
00:49
Filter an Array of Objects with JavaScript - YouTube
JavaScript Array Methods in Minutes: FILTER() — 3 EXAMPLES! - ...
11:15
How to Use filter() in JavaScript | Filter Arrays Like a Pro - YouTube
JavaScript filter() method in 6 minutes!
04:18
JavaScript Array Filter Method - Basic Example & Real Project Example ...
02:58
JS Array Methods Explained #6 - FILTER Method - YouTube
Programiz
programiz.com › javascript › library › array › filter
Javascript Array filter()
Returns a new array with only the elements that passed the test. ... const prices = [1800, 2000, null, 3000, 5000, "Thousand", 500, 8000] function checkPrice(element) { return element > 2000 && !Number.isNaN(element); } let filteredPrices = prices.filter(checkPrice); console.log(filteredPrices); // [ 3000, 5000, 8000 ] // using arrow function
DEV Community
dev.to › vinayagam_6a170db9281d526 › javascript-array-iteration-methods-a-complete-guide-to-foreach-map-and-filter-o80
JavaScript Array Iteration Methods: A Complete Guide to forEach(), map ...
1 day ago - Definition filter() creates a new array containing only the elements that satisfy a given condition (true). 👉 It does not modify the original array. 👉 It returns a new array. ... 1.What is filter() in JavaScript?
W3Schools
w3schools.com › jsref › jsref_filter.asp
JavaScript Array filter() Method
The filter() method creates a new array filled with elements that pass a test provided by a function.
Tabnine
tabnine.com › home › how to use the array filter() method in javascript
How to Use the Array filter() method in JavaScript - Tabnine
July 25, 2024 - The filter() method filters an array according to provided criteria, returning a new array containing the filtered items. The Array object’s filter() method is an iteration method which enables us to retrieve all of an array’s elements that ...
Ultimate Courses
ultimatecourses.com › blog › array-filter-javascript
Exploring Array Filter in JavaScript - Ultimate Courses
March 25, 2020 - Array Filter expects us to return an expression that will evaluate true or false, we can go straight to the finish line and make it easier by supplying literally true and false array values. I’m using JavaScript’s Boolean object to coerce the array element to a Boolean.
GitHub
github.com › zloirock › core-js
GitHub - zloirock/core-js: Standard Library · GitHub
import 'core-js/actual'; Promise.try(() => 42).then(it => console.log(it)); // => 42 Array.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5] [1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2] Iterator.concat([1, 2], function * (i) { while (true) yield i++; }(3)) .drop(1).take(5) .filter(it => it % 2) .map(it => it ** 2) .toArray(); // => [9, 25] structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])
Author zloirock
Favtutor
favtutor.com › articles › javascript-array-filter
JavaScript Array Filter() Method (with Examples)
November 8, 2023 - The filter() function is a powerful array method in JavaScript that allows one to create a new array containing elements that satisfy a specific condition.
Fjolt
fjolt.com › article › javascript-filter
Javascript Array Filter Method
The filter method in Javascript creates a shallow copy of an array, filtering it based on a number of conditions. It accepts a callback function. The array which filter produces will usually be a reduced version of the original array.
Codecademy
codecademy.com › docs › javascript › arrays › .filter()
JavaScript | Arrays | .filter() | Codecademy
July 29, 2025 - JavaScript’s array.filter() method creates a new array containing only the elements from the original array that pass a test implemented by a provided function.
daily.dev
daily.dev › home › blog › get into tech › filter arrays in javascript: a primer
Filter Arrays in JavaScript: A Primer
December 22, 2025 - Learn how to efficiently filter arrays in JavaScript using the filter() method. Explore real-world examples and combine filter() with other array methods for advanced data handling.
Anton Dev Tips
antondevtips.com › blog › how-to-filter-arrays-in-javascript-a-comprehensive-guide
How to Filter Arrays in JavaScript: A Comprehensive Guide
Here as a 2nd parameter of reduce function, { rating } is used to extracts a rating property of the response object for each element of the array. In JavaScript the most common way to filter data is using a filter function.
DEV Community
dev.to › ivanadokic › javascript-array-methods-filter-map-reduce-and-sort-32m5
JavaScript Array methods: Filter, Map, Reduce, and Sort - DEV Community
April 2, 2021 - Follows the examples of how to use it. filter() returns a new array of filter elements that meet a certain condition. The filter() method creates a new array with all elements that pass the test implemented by the provided function.
React
react.dev › learn › rendering-lists
Rendering Lists – React
You can use JavaScript’s filter() method to return just those people. This method takes an array of items, passes them through a “test” (a function that returns true or false), and returns a new array of only those items that passed the test (returned true).
jsonworld
jsonworld.com › blog › filter-array-in-javascript
Filter Array in Javascript | JSON World
April 14, 2020 - filter() creates a new array with filtered elements that lie under specific conditions.
Medium
medium.com › poka-techblog › simplify-your-javascript-use-map-reduce-and-filter-bd02c593cc2d
Simplify your JavaScript – Use .map(), .reduce(), and .filter() | by Etienne Talbot | poka-techblog | Medium
September 4, 2019 - Since all three are called on arrays and since .map() and .filter() both return arrays, we can easily chain our calls.
Vultr Docs
docs.vultr.com › javascript › standard-library › Array › filter
JavaScript Array filter() - Filter Array Elements | Vultr Docs
November 28, 2024 - This method provides an efficient way to sift through arrays and select only those elements which meet the criteria you define, all without altering the original array. In this article, you will learn how to utilize the filter() function to ...
Adripofjavascript
adripofjavascript.com › blog › drips › filtering-arrays-with-array-filter.html
Filtering Arrays with Array#filter - A Drip of JavaScript
The filter method accepts a callback function. In that callback function we examine each element of the array indidually, and return true if we want the element to pass the filter.
Flexiple
flexiple.com › javascript › javascript-filter-array
How to use the JavaScript filter array method? - Flexiple Tutorials - Flexiple
March 11, 2022 - After filtering it returns an array with the values that pass the filter. The JavaScript filter function iterates over the existing values in an array and returns the values that pass.