Exploring JS array methods

exploring-jS-array-methods.js

// This is the code that prompted / created the blog post
// https://www.andyjarrett.com/posts/2024/exploring-array-methods-including-push-pop-shift-unshift-map-filter-reduce-and-others/


// push()
["🥶","🥶","🥶","🥶"].push('🥵') // =  ["🥶","🥶","🥶","🥶","🥵"]
// pop()
["😎","🥵","🥶","🤢"].pop() // =  ["😎","🥵","🥶"]
// shift()
["😎","🥵","🥶","🤢"].shift() // =  ["🥵","🥶","🤢"]
// unshift()
["😎","🥵","🥶","🤢"].unshift('💩') // =  ["💩","😎","🥵","🥶","🤢"]
// map()
["😎","🥵","🥶","🤢"].map(item => item + '!') // =  ["😎!","🥵!","🥶!","🤢!"]
// filter()
["😎","🥵","🥶","🤢"].filter(item => item === '🥶') // =  ["🥶"]
// reduce()
[1,2,3].reduce((acc, val) => acc + val, 0) // =  6
// some()
[1,2,3].some(val => val > 2) // =  true
// every()
[1,2,3].every(val => val > 0) // =  true
// find()
[1,2,3].find(val => val > 2) // =  3
// findIndex()
[1,2,3].findIndex(val => val > 2) // =  2
// reverse()
["😎","🥵","🥶","🤢"].reverse() // =  ["🤢","🥶","🥵","😎"]
// at()
["😎","🥵","🥶","🤢"].at(1) // =  🥵
// slice()
["😎","🥵","🥶","🤢"].slice(1, 2) // =  ["🥵"]
// concat()
["🥶"].concat(["🥵"]) // =  ["🥶","🥵"]
// includes()
["😎","🥵","🥶","🤢"].includes('🥵') // =  true
// indexOf()
["😎","🥵","🥶","🤢"].indexOf('🥵') // =  1
// join()
["😎","🥵","🥶","🤢"].join(' ') // =  "😎 🥵 🥶 🤢"
// flat()
[1,[2,3],[4,5]].flat() // =  [1,2,3,4,5]
// flatMap()
[1,2,3].flatMap(val => [val, val * 2]) // =  [1,2,2,4,3,6]