Thread by @swapnakpanda

Memorise JavaScript Array Methods in 11 Steps

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📋 TOC

➊ Static Methods
➋ Accepts -ve Index
➌ Returns Boolean
➍ Returns Index
➎ Returns new Array
➏ Modifies Existing Array
➐ Iterates through entire Array
➑ Iterates Partially
➒ Checks Elements "as it is"
➓ Checks Elements custom way
➊➊ Accepts a callback

➊ Static Methods

❍ of()
❍ from()
❍ isArray()

➋ Accepts -ve Index

❍ at()
❍ slice()
❍ splice()

➌ Returns Boolean

❍ every()
❍ some()
❍ includes()

➍ Returns Index

❍ indexOf()
❍ lastIndexOf()
❍ findIndex()

➎ Returns new Array

❍ of()
❍ from()
❍ concat()
❍ map()
❍ filter()
❍ slice()
❍ splice()
❍ flat()
❍ flatMap()

➏ Modifies Existing Array

❍ fill()
❍ copyWithin()
❍ pop()
❍ push()
❍ reverse()
❍ shift()
❍ unshift()
❍ sort()

➐ Iterates through entire Array

❍ forEach()
❍ map()
❍ reduce()
❍ reduceRight()
❍ filter()
❍ flat()
❍ flatMap()
❍ reverse()
❍ sort()
❍ join()

➑ Iterates Partially

❍ every()
❍ some()
❍ find()
❍ findIndex()
❍ includes()
❍ indexOf()
❍ lastIndexOf()
❍ slice()
❍ splice()
❍ fill()
❍ copyWithin()

➒ Checks Elements "as it is"

❍ indexOf()
❍ lastIndexOf()
❍ includes()

➓ Checks Elements custom way

❍ every()
❍ sum()
❍ findIndex()
❍ find()
❍ filter()

➊➊ Accepts a callback

❍ some()
❍ every()
❍ findIndex()
❍ find()
❍ filter()
❍ forEach()
❍ map()
❍ flatMap()
❍ reduce()
❍ reduceRight()

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