js 按ascii码排序

function sortStringByASCII(str) {
  // 将字符串转换为字符数组
  let charArray = str.split('');
  
  // 使用sort方法按ASCII码排序
  charArray.sort((a, b) => a.charCodeAt(0) - b.charCodeAt(0));
  
  // 将排序后的字符数组转换回字符串
  return charArray.join('');
}

// 示例
let originalString = "hello world";
let sortedString = sortStringByASCII(originalString);
console.log(sortedString); // 输出: " dehllloorw"

function sortStringIgnoreCase(str) {
  let charArray = str.split('');
  charArray.sort((a, b) => {
    let lowerA = a.toLowerCase();
    let lowerB = b.toLowerCase();
    if (lowerA === lowerB) {
      return a.charCodeAt(0) - b.charCodeAt(0); // 如果字母相同，按原始大小写排序
    }
    return lowerA.charCodeAt(0) - lowerB.charCodeAt(0);
  });
  return charArray.join('');
}

let mixedCaseString = "Hello World";
let sortedMixedCaseString = sortStringIgnoreCase(mixedCaseString);
console.log(sortedMixedCaseString); // 输出: " deHllloorW"

function sortStringWithSpecialChars(str) {
  let charArray = str.split('');
  charArray.sort((a, b) => {
    let isLetterA = /^[A-Za-z]$/.test(a);
    let isLetterB = /^[A-Za-z]$/.test(b);
    
    if (isLetterA && isLetterB) {
      return a.localeCompare(b); // 只对字母进行自然排序
    }
    return a.charCodeAt(0) - b.charCodeAt(0); // 其他字符按ASCII码排序
  });
  return charArray.join('');
}

let stringWithSpecialChars = "hello! world?";
let sortedStringWithSpecialChars = sortStringWithSpecialChars(stringWithSpecialChars);
console.log(sortedStringWithSpecialChars); // 输出: " !dehllloorw?"