All JS String Methods In One Post!

const firstName = 'Aya ';
const lastName = 'Bouchiha';
// 3 methods to concatenate two strings
console.log(firstName.concat(lastName)); // Aya Bouchiha
console.log(firstName +  lastName); // Aya Bouchiha
console.log(`${firstName}${lastName}`); // Aya Bouchiha

const quote =  "If you don't know where you are going, any road will get you there.";
console.log(quote.match(/you/g)) // [ "you", "you", "you" ]

const conversation = `Hi, I'm Aya Bouchiha\nHello, I'm John Doe, nice to meet you.`;

const matchedArrays = [...conversation.matchAll(/I'm\s(?<firstName>[a-zA-Z]+)\s(?<lastName>[a-zA-Z]+)/gi)];

console.log(matchedArrays[0])

for (let matchedArray of matchedArrays) {
  const {firstName, lastName} = matchedArray['groups']
  console.log(firstName, lastName)
}

[
  "I'm Aya Bouchiha",
  'Aya',
  'Bouchiha',
  index: 4,
  input: "Hi, I'm Aya Bouchiha\nHello, I'm John Doe, nice to meet you.",
  groups: [Object: null prototype] { firstName: 'Aya', lastName: 'Bouchiha' }
]

Aya Bouchiha
John Doe

const allLetters = 'abcdefghijklmnopqrstuvwxyz'; 
console.log(allLetters.split())
console.log(allLetters.split(''))

const emails = 'developer.aya.b@gmail.com,johndoes@gmail.com,simon.dev@gmail.com';
console.log(emails.split(','))

[ 'abcdefghijklmnopqrstuvwxyz' ]

[
  'a', 'b', 'c', 'd', 'e', 'f',
  'g', 'h', 'i', 'j', 'k', 'l',
  'm', 'n', 'o', 'p', 'q', 'r',
  's', 't', 'u', 'v', 'w', 'x',
  'y', 'z'
]

[
  'developer.aya.b@gmail.com',
  'johndoes@gmail.com',
  'simon.dev@gmail.com'
]

const email = 'john.doe@gmail.com';
console.log(email.replace('@gmail.com', '')); // john.doe
console.log(email.replace(/@[a-z]+.[a-z]+/g, '')); // john.doe

const slug = '5-html-tags-that-almost-nobody-knows';
// 5 html tags that almost nobody knows
console.log(slug.replaceAll('-', ' ')); 
// 5 html tags that almost nobody knows
console.log(slug.replaceAll(/-/g, ' '));

const quote = 'A dream does not become reality through magic; it takes sweat, determination, and hard work';
console.log(quote.search('magic')); // 40
console.log(quote.search(/life/g)); // -1

const inputValue = '  Aya   Bouchiha\t';
console.log(inputValue.trim()); // Aya   Bouchiha

const address = 'Morocco, Rabat';
console.log(address.includes('Morocco'));// true
console.log(address.includes('morocco'));// false
console.log(address.includes('tanger')); // false

const name = 'AYa BoUCHIha';
console.log(name.toLowerCase()) // aya bouchiha

const name = 'AYa BoUCHIha';
console.log(name.toUpperCase()) // AYA BOUCHIHA

const turkishSentence = 'iskender kebap';
// ISKENDER KEBAP
console.log(turkishSentence.toLocaleUpperCase('en-us')); 
// İSKENDER KEBAP
console.log(turkishSentence.toLocaleUpperCase('tr'))

const firstName = 'aya';
console.log(firstName.repeat(3)) // ayaayaaya

const fullName = 'Aya Bouchiha';
console.log(fullName.slice()) // Aya Bouchiha
console.log(fullName.slice(0,3)) // Aya
console.log(fullName.slice(4,fullName.length)) // Bouchiha

const fullName = 'Aya Bouchiha';
console.log(fullName.substr(0,3)) // Aya
console.log(fullName.substr(4,8)) // Bouchiha

const product = 'laptop';
console.log(product.charAt(3)) // t
console.log(product.charAt(10)) // ''
product.charAt("this is a string!") // l
console.log(product.charAt()) // l

const product = 'laptop';
console.log(`the character code of ${product.charAt(2)} is  ${product.charCodeAt(2)}`)
// the character code of p is 112

const phoneNumber = '+212612342187';
console.log(phoneNumber.startsWith('+212')) // true
console.log(phoneNumber.startsWith('6',4)) // true
console.log(phoneNumber.startsWith('6',3)) // false

const address = 'tanger, Morocco';
console.log(address.endsWith('Morocco')); // true
console.log(address.endsWith('Canada')); // false

const gmail = 'developer.aya.b@gmail.com';
const isGmail = gmail.endsWith('@gmail', gmail.length - 4)
console.log(isGmail); // true

console.log(String.fromCharCode(112)) // p
console.log(String.fromCharCode(105,106)) // ij

const quote = "every day may not be good... but there's something good in every day";
console.log(quote.indexOf('good')); // 21
console.log(quote.indexOf('good',24)); // 51

const quote = "every day may not be good... but there's something good in every day";
console.log(quote.lastIndexOf('good')); // 51
console.log(quote.lastIndexOf('good',24)); // 21

const word1 = 'feel';
const word2 = 'flee';
// returns -1
// because word1 comes before word2
console.log(word1.localeCompare(word2))

const fName = new String('Aya');
const lName = 'Bouchiha';
console.log(fName); // [String: 'Aya']
console.log(fName.valueOf()); // Aya
console.log(lName.valueOf()); // Bouchiha

const moroccanCity = new String('tanger');
console.log(moroccanCity); // [String: 'tanger']
console.log(moroccanCity.toString()) // tanger