JavaScript电话号码格式化的多种实现方式

function getPhoneNum(arr) {
   return "(" + arr[0] + arr[1] + arr[2] + ") " + arr[3] + arr[4] + arr[5] + "-" + arr[6] + arr[7] + arr[8] + arr[9];
}

console.log(getPhoneNum([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]));

function createPhoneNumber(numbers) {
    const part1 = numbers.slice(0, 3).join('');
    const part2 = numbers.slice(3, 6).join('');
    const part3 = numbers.slice(6, 10).join('');
    return `(${part1}) ${part2}-${part3}`;
}

console.log(createPhoneNumber([1,2,3,4,5,6,7,8,9,0])); // 输出: (123) 456-7890

const message = `这是一个
跨越
多行的
字符串`;
console.log(message);
// 输出:
// 这是一个
// 跨越
// 多行的
// 字符串

const name = "Alice";
const age = 30;
const message = `我的名字是 ${name}，我今年 ${age} 岁。`;
console.log(message); // 输出: 我的名字是 Alice，我今年 30 岁。

const a = 5;
const b = 10;
const result = `a + b 的结果是 ${a + b}`;
console.log(result); // 输出: a + b 的结果是 15

// 传统方式
const greeting = "Hello, " + name + "! You are " + age + " years old.";

// 模板字符串
const greeting = `Hello, ${name}! You are ${age} years old.`;

function highlight(strings, ...values) {
  let result = '';
  strings.forEach((str, i) => {
    result += str + (values[i] || '');
  });
  return `<span style="color: red;">${result}</span>`;
}

const name = "Bob";
const age = 25;
const message = highlight`My name is ${name}, and I am ${age} years old.`;
console.log(message);
// 输出: <span style="color: red;">My name is Bob, and I am 25 years old.</span>

function getPhoneNum(arr){
  let format = "(xxx) xxx-xxxx"
  for (let i = 0; i < arr.length; i++) {
    format = format.replace("x", arr[i])
  }
  return format
}
console.log(getPhoneNum([1,2,3,4,5,6,7,8,9,0]));

function createPhoneNumber(numbers) {
    const phoneNumber = numbers.join('');
    return phoneNumber.replace(/(\d{3})(\d{3})(\d{4})/, "($1) $2-$3");
}

console.log(createPhoneNumber([1,2,3,4,5,6,7,8,9,0]));