How to use map() filter() reduce() | JavaScript Array Methods Tutorial

Coding2GO October 6, 2024
Video Thumbnail
Coding2GO Logo

Coding2GO

@coding2go

About

Would you like to be able to create modern websites, work as a web developer or simply learn new programming skills? Then this is the right channel for you! This is Coding2GO - the channel where you learn the most relevant coding concepts in just a few minutes. WHAT WE DO 🗣️🗣️🔥🔥🔥 - Fast paced and precise tutorials about HTML, CSS and JavaScript - Practical Projects + Source Code on our website (https://coding2go.com) - Beginner Courses on Udemy ABOUT US 👋👋 We are Fabian and Pavel from Berlin and our job as freelancers is to develop full stack web applications for our clients. And now we have made it our mission to teach what we know about the world of programming to aspiring developers like you. TECH STACK Pavel: HTML, CSS, JavaScript, PHP, SQL, Java, Python, React.js, React Native, C# Fabian: HTML, CSS, JavaScript, React.js, Node.js, Express.js, MongoDB, Adobe If you have an interesting offer for our viewers and you would like to sponsor our videos, send an email 😎

Video Description

Most important Array Methods Explained for Beginners | Learn Map, Filter, Reduce in JavaScript with Examples | Use array methods instead of foreach. Become a Member and get access to our udemy course 👉 https://www.youtube.com/channel/UCGpoeEhUBQBaaKZ_a8HB67Q/join *Check out our website*: 👉 https://www.coding2go.com * Get our CSS Udemy Course*: 👉 https://www.udemy.com/course/learn-html-and-css-in-7-days-web-developer-bootcamp/?couponCode=KEEPLEARNING *Host your own website with Hostinger*: 👉 https://www.hostinger.com/coding2go Use our code CODING2GO to get a 10% discount JavaScript Map, Filter, Reduce tutorial for beginners with practical examples and detailed explanations of essential JavaScript array methods like map, filter, reduce, and foreach. Learn how to manipulate arrays efficiently with one-liners, apply functional programming concepts, and transform data using map, filter for filtering arrays, and reduce for combining elements. This tutorial covers the key differences between foreach and map, how to write cleaner and more efficient code, and when to use these powerful JavaScript methods to improve your development workflow. What You'll Learn: Using JavaScript Map Method: Transforming arrays with the map function to create new arrays with modified data. Filtering Arrays with Filter: Learn how to use the filter method to extract specific elements from an array based on a condition. JavaScript Reduce Method: Master the reduce function to accumulate or combine array elements into a single value. JavaScript Foreach: Understanding the foreach loop for iterating over arrays without returning a new array. Using map, filter, and reduce to apply functional programming principles for cleaner, more maintainable code. Real-World Examples: How to use map, filter, reduce, and foreach in practical, real-world coding scenarios. Array Methods in One Line: Writing concise code using array methods like map, filter, and reduce in a single line. Difference Between Foreach and Map: Learn when to use foreach and map Array Manipulation: Learn to modify, filter, and reduce arrays efficiently for faster JavaScript development. Key Points: Map, Filter, Reduce in JavaScript: Core array methods used for transforming, filtering, and reducing data in JavaScript. Efficient Array Manipulation: Improve performance by using built-in array methods. Foreach vs Map: When to use foreach for iteration and map for returning a new array. Practical Examples: Filter an Array: Remove unwanted items from an array, like filtering a list of products based on price or color. Transform an Array with Map: Create new arrays by modifying values, like formatting strings, numbers, or dates. Summarize Data with Reduce: Combine array elements to calculate the total in a shopping cart.

Urgently Upgrade Your Gaming Setup

AI-recommended products based on this video

Loading...
Beelink SER3 Mini Desktop PC with AMD Ryzen 3 3200U 2C/4T, 16GB DDR4 500GB PCIE3.0 X4 SSD, Dual Display Output, WiFi6/BT5.2 W-11 Pro Mini Gaming Computer

Beelink SER3 Mini Desktop PC with AMD Ryzen 3 3200U 2C/4T, 16GB DDR4 500GB PCIE3.0 X4 SSD, Dual Display Output, WiFi6/BT5.2 W-11 Pro Mini Gaming Computer

(239)
$459.00
FREE delivery Sat, Jan 3
Loading...
Beelink SER3 Mini PC, AMD Ryzen 3 3200U(14nm, 2C/4T) up to 3.5GHz, Mini Gaming Computer 16GB DDR4 RAM 500GB PCIE3.0 X4 SSD, Micro PC 4K@60Hz Dual Display, Mini Computer WiFi6/BT5.2/HTPC/W-11 Pro

Beelink SER3 Mini PC, AMD Ryzen 3 3200U(14nm, 2C/4T) up to 3.5GHz, Mini Gaming Computer 16GB DDR4 RAM 500GB PCIE3.0 X4 SSD, Micro PC 4K@60Hz Dual Display, Mini Computer WiFi6/BT5.2/HTPC/W-11 Pro

(1,251)
$329.00
FREE delivery Sat, Jan 3
Loading...
Beelink SER3 Mini PC, AMD Ryzen 3 3200U(up to 3.5GHz) 2C/4T, Mini Computer 16GB DDR4 RAM 500GB SSD, Mini Desktop Computer 4K@60Hz Dual HDMI Display WiFi6/BT5.2/WOL/HTPC/W-11 Pro

Beelink SER3 Mini PC, AMD Ryzen 3 3200U(up to 3.5GHz) 2C/4T, Mini Computer 16GB DDR4 RAM 500GB SSD, Mini Desktop Computer 4K@60Hz Dual HDMI Display WiFi6/BT5.2/WOL/HTPC/W-11 Pro

(815)
$329.00
FREE delivery Sat, Jan 3
50+ bought in past month
Loading...
Corsair Vengeance LPX 32GB (2 X 16GB) DDR4 3200 (PC4-25600) C16 1.35V Desktop Memory - Black
Best Seller

Corsair Vengeance LPX 32GB (2 X 16GB) DDR4 3200 (PC4-25600) C16 1.35V Desktop Memory - Black

(16,675)
$112.99$101.69
FREE delivery Sun, Aug 10
500+ bought in past month
Loading...
Beelink Mini PC, Intel 12th Gen Alder Lake- N100(up to 3.4GHz), 16GB DDR4 RAM 500GB M.2 SSD, Mini S12 Desktop Computers, USB3.2/WiFi 5/BT4.2 for Home/Office

Beelink Mini PC, Intel 12th Gen Alder Lake- N100(up to 3.4GHz), 16GB DDR4 RAM 500GB M.2 SSD, Mini S12 Desktop Computers, USB3.2/WiFi 5/BT4.2 for Home/Office

(204)
$219.00
PrimeFREE delivery Sat, Jun 14
Loading...
Beelink Mini S13 Mini PC,Intel 13th Twin Lake N150(Upgraded N100, 4C/4T),Mini Computer 16GB RAM 500GB M.2 SSD, W-11 Pro Gigabit Ethernet, 4K UHD, WiFi6, BT5.2 Home/Business Mini Desktop Computer

Beelink Mini S13 Mini PC,Intel 13th Twin Lake N150(Upgraded N100, 4C/4T),Mini Computer 16GB RAM 500GB M.2 SSD, W-11 Pro Gigabit Ethernet, 4K UHD, WiFi6, BT5.2 Home/Business Mini Desktop Computer

(82)
$308.00
FREE delivery Sun, Aug 10
Loading...
OUMAX N150 Dual LAN Mini PC, Intel 13th Gen Twin Lake N150 (Up to 3.6GHz), 16GB DDR4 500GB M.2 SSD, Mini Computer Support 4K Dual HDMI, WiFi5/BT5.0/USB3.2, Built-in 45W Power Supply Office Desktop PC

OUMAX N150 Dual LAN Mini PC, Intel 13th Gen Twin Lake N150 (Up to 3.6GHz), 16GB DDR4 500GB M.2 SSD, Mini Computer Support 4K Dual HDMI, WiFi5/BT5.0/USB3.2, Built-in 45W Power Supply Office Desktop PC

(0)
$299.00
PrimeFREE delivery Sat, Jun 14
Loading...
EVGA 1000 GQ, 80+ GOLD 1000W, Semi Modular, EVGA ECO Mode, 5 Year Warranty, Power Supply 210-GQ-1000-V1,Black

EVGA 1000 GQ, 80+ GOLD 1000W, Semi Modular, EVGA ECO Mode, 5 Year Warranty, Power Supply 210-GQ-1000-V1,Black

(396)
$199.95
FREE delivery Tue, Oct 14
Loading...
Logitech G203 Wired Gaming Mouse, 8,000 DPI, Rainbow Optical Effect LIGHTSYNC RGB, 6 Programmable Buttons, On-Board Memory, Screen Mapping, PC/Mac Computer and Laptop Compatible - Black
Best Seller

Logitech G203 Wired Gaming Mouse, 8,000 DPI, Rainbow Optical Effect LIGHTSYNC RGB, 6 Programmable Buttons, On-Board Memory, Screen Mapping, PC/Mac Computer and Laptop Compatible - Black

(17,871)
$27.98$22.38
FREE delivery Tue, Oct 14 on your first order
500+ bought in past month
Loading...
Redragon M612 Predator RGB Gaming Mouse, 8000 DPI Wired Optical Mouse with 11 Programmable Buttons & 5 Backlit Modes, Software Supports DIY Keybinds Rapid Fire Button

Redragon M612 Predator RGB Gaming Mouse, 8000 DPI Wired Optical Mouse with 11 Programmable Buttons & 5 Backlit Modes, Software Supports DIY Keybinds Rapid Fire Button

(8,052)
$22.49
FREE delivery Thu, Aug 21 on your first order
500+ bought in past month
Loading...
acer Chromebook 315 Laptop | Intel Pentium Silver N6000 | 15.6" Full HD IPS Touch | Intel UHD Graphics | 8GB LPDDR4X | 64GB eMMC | Wi-Fi 6 | DTS Audio | Protective Sleeve | Chrome OS | CB315-4HT-P8PQ

acer Chromebook 315 Laptop | Intel Pentium Silver N6000 | 15.6" Full HD IPS Touch | Intel UHD Graphics | 8GB LPDDR4X | 64GB eMMC | Wi-Fi 6 | DTS Audio | Protective Sleeve | Chrome OS | CB315-4HT-P8PQ

(35)
$449.99
FREE delivery Sun, Jun 15
Loading...
Acer PM161Q Bbmiuux 15.6" Full HD (1920 x 1080) Widescreen Portable IPS Display | AMD FreeSync Technology | 4ms (G to G) | 2 Speakers | USB Type-C Cable and Mini HDMI Cable

Acer PM161Q Bbmiuux 15.6" Full HD (1920 x 1080) Widescreen Portable IPS Display | AMD FreeSync Technology | 4ms (G to G) | 2 Speakers | USB Type-C Cable and Mini HDMI Cable

(149)
$157.04$119.76
FREE delivery Mon, Aug 11
100+ bought in past month
Loading...
acer Enduro T1 ET108-11A-80PZ Rugged Tablet, 8.0" WXGA IPS Touch, MediaTek MT8385 Octa-Core Processor, 4GB LPDDR4, 64GB eMMC, WiFi-5, Front 2MP Webcam, Rear 5MP Webcam, Handstrap, Android 9 Pie

acer Enduro T1 ET108-11A-80PZ Rugged Tablet, 8.0" WXGA IPS Touch, MediaTek MT8385 Octa-Core Processor, 4GB LPDDR4, 64GB eMMC, WiFi-5, Front 2MP Webcam, Rear 5MP Webcam, Handstrap, Android 9 Pie

(29)
$549.34
Loading...
Acer Nitro V 15.6 FHD 144Hz Gaming Laptop, Intel i7-13620H, 32GB DDR5, 1TB SSD, NVIDIA GeForce RTX 4060, Keyboard Backlight, Wi-Fi 6, HD Webcam, Windows 11 Home, Black, 256GB Docking Station Set

Acer Nitro V 15.6 FHD 144Hz Gaming Laptop, Intel i7-13620H, 32GB DDR5, 1TB SSD, NVIDIA GeForce RTX 4060, Keyboard Backlight, Wi-Fi 6, HD Webcam, Windows 11 Home, Black, 256GB Docking Station Set

(105)
$1,655.10
FREE delivery Wed, Jun 18
Loading...
acer Nitro 50 N50-620-UA91 Gaming Desktop | 11th Gen Intel Core i5-11400F 6-Core Processor | NVIDIA GeForce GTX 1650 | 8GB DDR4 | 512GB NVMe M.2 SSD | Intel Wi-Fi 6 AX201 | Keyboard and Mouse

acer Nitro 50 N50-620-UA91 Gaming Desktop | 11th Gen Intel Core i5-11400F 6-Core Processor | NVIDIA GeForce GTX 1650 | 8GB DDR4 | 512GB NVMe M.2 SSD | Intel Wi-Fi 6 AX201 | Keyboard and Mouse

(283)
$1,658.99
Loading...
SAMSUNG 870 EVO SATA SSD 500GB 2.5” Internal Solid State Drive, Upgrade PC or Laptop Memory and Storage for IT Pros, Creators, Everyday Users, MZ-77E500B/AM [Canada Version]

SAMSUNG 870 EVO SATA SSD 500GB 2.5” Internal Solid State Drive, Upgrade PC or Laptop Memory and Storage for IT Pros, Creators, Everyday Users, MZ-77E500B/AM [Canada Version]

(41,678)
$74.97
FREE delivery Wed, Jun 18
400+ bought in past month
Loading...
SAMSUNG 870 EVO SATA III SSD 4TB 2.5” Internal Solid State Drive, Upgrade PC or Laptop Memory and Storage for IT Pros, Creators, Everyday Users, MZ-77E4T0B/AM [Canada Version]

SAMSUNG 870 EVO SATA III SSD 4TB 2.5” Internal Solid State Drive, Upgrade PC or Laptop Memory and Storage for IT Pros, Creators, Everyday Users, MZ-77E4T0B/AM [Canada Version]

(41,656)
$399.97
FREE delivery Tue, Jun 17
100+ bought in past month
Loading...
Samsung 990 EVO Plus - 4TB PCIe Gen4. X4, Gen5. X2 NVMe 2.0 - M.2 Internal SSD, Speed Up to 7,250 MBs, Upgrade Storage for PC-Laptops, HMB Technology and Intelligent Turbowrite (MZ-V9S4T0B/AM)

Samsung 990 EVO Plus - 4TB PCIe Gen4. X4, Gen5. X2 NVMe 2.0 - M.2 Internal SSD, Speed Up to 7,250 MBs, Upgrade Storage for PC-Laptops, HMB Technology and Intelligent Turbowrite (MZ-V9S4T0B/AM)

(1,811)
$359.99$341.99
FREE delivery Tue, Jun 17
100+ bought in past month
Loading...
SAMSUNG EVO Select Micro SD-Memory-Card + Adapter, 128GB microSDXC 160MB/s Full HD & 4K UHD, UHS-I, U3, A2, V30, for Android Smartphones, Tablets, Nintendo-Switch (MB-ME128SA/AM) [Canada Version]

SAMSUNG EVO Select Micro SD-Memory-Card + Adapter, 128GB microSDXC 160MB/s Full HD & 4K UHD, UHS-I, U3, A2, V30, for Android Smartphones, Tablets, Nintendo-Switch (MB-ME128SA/AM) [Canada Version]

(12,472)
$19.99$18.59
FREE delivery Sun, Aug 10 on your first order
400+ bought in past month
Loading...
Corsair RM1000e Fully Modular Low-Noise ATX Power Supply - Dual EPS12V Connectors - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Modern Standby Support - Black

Corsair RM1000e Fully Modular Low-Noise ATX Power Supply - Dual EPS12V Connectors - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Modern Standby Support - Black

(41)
$219.19$204.66
FREE delivery Oct 15 - 22
Loading...
Corsair RM1200x Shift Fully Modular ATX Power Supply - Modular Side Interface - ATX 3.1 & PCIe 5.1 Compliant - Zero RPM Fan Mode - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Black, 1200W

Corsair RM1200x Shift Fully Modular ATX Power Supply - Modular Side Interface - ATX 3.1 & PCIe 5.1 Compliant - Zero RPM Fan Mode - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Black, 1200W

(25)
$254.98$203.98
FREE delivery Wed, Oct 8
50+ bought in past month
Loading...
Corsair SF1000 (2024) Fully Modular Low Noise 80 Plus Platinum ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Ready – SFX-to-ATX Bracket Included – Black

Corsair SF1000 (2024) Fully Modular Low Noise 80 Plus Platinum ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Ready – SFX-to-ATX Bracket Included – Black

(23)
$284.99
FREE delivery Wed, Oct 8
Loading...
Corsair RM1200e (2023) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Platinum Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black

Corsair RM1200e (2023) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Platinum Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black

(49)
$249.99
FREE delivery Wed, Oct 8