가장 일반적인 JavaScript 문자열 메소드 목록

가장 일반적인 JavaScript 문자열 메소드 목록:

• 길이:

let message = "Hello, world!";
console.log(message.length); // Output: 13

• 연결():

let greeting = "Hello";
let name = "Alice";
let fullGreeting = greeting.concat(", ", name, "!");
console.log(fullGreeting); // Output: "Hello, Alice!"

• charAt():

let message = "JavaScript";
console.log(message.charAt(0)); // Output: "J"
console.log(message.charAt(5)); // Output: "S"

• indexOf():

let sentence = "The quick brown fox jumps over the lazy dog.";
console.log(sentence.indexOf("quick")); // Output: 4
console.log(sentence.indexOf("dog")); // Output: 37
console.log(sentence.indexOf("lion")); // Output: -1 (not found)

• lastIndexOf():

let quote = "To be, or not to be, that is the question.";
console.log(quote.lastIndexOf("be")); // Output: 23
console.log(quote.lastIndexOf("the")); // Output: 33

• 슬라이스():

let fruit = "apple, banana, cherry";
console.log(fruit.slice(0, 5)); // Output: "apple"
console.log(fruit.slice(7, 13)); // Output: "banana"
console.log(fruit.slice(15)); // Output: "cherry"

• 하위 문자열():

let text = "Hello, world!";
console.log(text.substring(0, 5)); // Output: "Hello"
console.log(text.substring(7, 12)); // Output: "world"

• 하위 문자열():

let message = "The quick brown fox jumps.";
console.log(message.substr(4, 5)); // Output: "quick"
console.log(message.substr(10)); // Output: "brown fox jumps."

• toLowerCase():

let text = "JAVASCRIPT IS AWESOME!";
console.log(text.toLowerCase()); // Output: "javascript is awesome!"

• 대문자():

let text = "hello, world!";
console.log(text.toUpperCase()); // Output: "HELLO, WORLD!"

• 트림():

let greeting = "   Hello, world!   ";
console.log(greeting.trim()); // Output: "Hello, world!"

• 대체():

let text = "I like cats. Cats are fluffy.";
console.log(text.replace("cats", "dogs")); // Output: "I like dogs. Cats are fluffy."
console.log(text.replace(/cats/i, "dogs")); // Output: "I like dogs. Cats are fluffy." (case-insensitive)

• 분할():

let csv = "apple,banana,cherry";
let fruits = csv.split(",");
console.log(fruits); // Output: ["apple", "banana", "cherry"]

• 포함():

let message = "The quick brown fox jumps over the lazy dog.";
console.log(message.includes("quick")); // Output: true
console.log(message.includes("tiger")); // Output: false

• startsWith():

let greeting = "Hello, world!";
console.log(greeting.startsWith("Hello")); // Output: true
console.log(greeting.startsWith("world")); // Output: false

• endsWith():

let filename = "myfile.pdf";
console.log(filename.endsWith(".pdf")); // Output: true
console.log(filename.endsWith(".txt")); // Output: false

• 일치():

let text = "The quick brown fox jumps.";
let pattern = /quick/;
console.log(text.match(pattern)); // Output: ["quick"]

• 검색():

let text = "The quick brown fox jumps.";
let pattern = /brown/;
console.log(text.search(pattern)); // Output: 10

• 반복():

let message = "Hello ";
console.log(message.repeat(3)); // Output: "Hello Hello Hello "

• trimStart():

let greeting = "   Hello, world!   ";
console.log(greeting.trimStart()); // Output: "Hello, world!   "

• trimEnd():

let greeting = "   Hello, world!   ";
console.log(greeting.trimEnd()); // Output: "   Hello, world!"

• padStart():

let number = "42";
console.log(number.padStart(4, "0")); // Output: "0042"

• padEnd():
  let word = "JavaScript";
  console.log(word.padEnd(15, ".")); // 출력: "자바스크립트....."

• 접속():
  

let str = "Hello, world!";
let result = str.splice(7, 5, "everyone");
console.log(result); // Output: "world"
console.log(str); // Output: "Hello, everyone!"

• toString():

let num = 42;
console.log(num.toString()); // Output: "42"

• valueOf():

let str = "JavaScript";
console.log(str.valueOf()); // Output: "JavaScript"

• charCodeAt():

let message = "Hello";
console.log(message.charCodeAt(0)); // Output: 72
console.log(message.charCodeAt(4)); // Output: 111

• codePointAt():

let emoji = "?";
console.log(emoji.codePointAt(0)); // Output: 128512

정규화():

let str1 = "café";
let str2 = "cafe\u0301";
console.log(str1.normalize() === str2.normalize()); // Output: true

여기에서는 길이 구하기 또는 문자열 연결과 같은 기본 작업부터 패턴 일치 및 유니코드 정규화와 같은 고급 기술에 이르기까지 JavaScript의 광범위한 문자열 조작 작업을 다룹니다.

위 내용은 가장 일반적인 JavaScript 문자열 메소드 목록의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!