References

Array.at()

Array.concat()

Array.copyWithin()

Object.defineProperties()

Object.defineProperty()

Object.entries()

Object.freeze()

Object.fromEntries()

Object.getOwnPropertyDescriptor()

Object.getOwnPropertyDescriptors()

Object.getOwnPropertyNames()

Object.getOwnPropertySymbols()

Object.getPrototypeOf()

Object.hasOwn()

Object.hasOwnProperty()

Object.is()

Object.isExtensible()

Object.isFrozen()

Object.isPrototypeOf()

Object.isSealed()

Object.keys()

Object.preventExtensions()

Object.seal()

Object.setPrototypeOf()

Object.toLocaleString()

String.fromCodePoint()

String.includes()

String.indexOf()

String.lastIndexOf()

String.localeCompare()

String.toLocaleLowerCase()

String.toLocaleUpperCase()

String.lastIndexOf()

Leírás

Visszatér a String példány azon indexével, ahol utoljára fordul elő (kezdődik) az argumentumba írt string.

Szintaxis

lastIndexOf(searchString)
lastIndexOf(searchString, position)

Példa

const paragraph1 = 'Javascript'
 
console.log(paragraph1.lastIndexOf('s'))
// Expected output: 4
 
const paragraph2 = 'TechOnTheNet'
 
console.log(paragraph2.lastIndexOf('T', 4))
// Expected output: 0

in this article

Leírás
Szintaxis
Példa