Tahaa Tambe

My Favorite 10 Array Methods

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Tahaa Tambe
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2 min read

  1. map(): The Shape-Shifter
    Once upon a time in the kingdom of Arrays, a group of numbers wanted a glow-up. Enter the powerful sorcerer map(). With a flick of their wand, every number was doubled!
let numbers = [1, 2, 3, 4];
let doubled = numbers.map(num => num * 2);
console.log(doubled); 
// [2, 4, 6, 8]

“From zeros to heroes, we are twice as nice!" exclaimed the numbers.

  1. filter(): The Gatekeeper
    A party was happening, but only the even numbers could get past the velvet rope. filter() played the bouncer, checking IDs.
let guests = [1, 2, 3, 4, 5];
let evenGuests = guests.filter(num => num % 2 === 0);
console.log(evenGuests); 
// [2, 4]

Sorry oddballs, this party is for evens only.

  1. reduce(): The Wise Sage
    When the numbers couldn’t decide who was the most important, they turned to the ancient sage reduce() for wisdom.
let coins = [1, 2, 3, 4];
let treasure = coins.reduce((total, coin) => total + coin, 0);
console.log(treasure); 
// 10

“Together, we are richer!" declared the coins.

  1. forEach(): The Chatterbox
    forEach() loved gossiping and couldn’t keep any secrets.
let friends = ["Tahaa", "Akshay", "Aditya"];
friends.forEach(friend => console.log(friend));
// Tahaa
// Akshay
// Aditya

“I’ll tell you everything I know!" said forEach.

  1. find(): The Detective
    find() was on a mission to uncover the first treasure worth over 50 gold coins.
let treasures = [30, 55, 70];
let firstBigTreasure = treasures.find(treasure => treasure > 50);
console.log(firstBigTreasure); 
// 55

Case cracked! Found it! exclaimed find.

  1. findIndex(): The Tracker
    The sidekick to find(), findIndex() loved tracking locations.
let monsters = ["goblin", "troll", "dragon"];
let dragonIndex = monsters.findIndex(monster => monster === "dragon");
console.log(dragonIndex); 
// 2

"The dragon lurks at index 2!" he reported.

  1. some(): The Optimist
    some() was the type to always see a silver lining.
let spells = ["fireball", "ice", "healing"];
let hasHealing = spells.some(spell => spell === "healing");
console.log(hasHealing); 
// true

"At least one of us can save the day!" cheered some.

  1. every(): The Perfectionist
    every() had high standards and accepted nothing less than perfection.
let grades = [95, 98, 100];
let allPassed = grades.every(grade => grade >= 90);
console.log(allPassed); 
// true

"Everyone must excel!" demanded every.

  1. includes(): The Inspector
    includes() always checked for hidden threats.
let traps = ["pit", "spikes", "snakes"];
let hasSnakes = traps.includes("snakes");
console.log(hasSnakes); 
// true

"Snakes? Why did it have to be snakes?" said includes nervously.

  1. sort(): The Organizer
    When chaos reigned, sort() brought order.
let heroes = ["Zelda", "Link", "Mario"];
let sortedHeroes = heroes.sort();
console.log(sortedHeroes); 
// ["Link", "Mario", "Zelda"]

"Order restored!" declared sort proudly.

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