'10px 20px'.replace(FLOAT_REGEX, '\\${0}')  

\${0}px \${0}px

'10px 20px'.replace(FLOAT_REGEX, '${0}') 

    - "g" for global
    - "i" for ignoreCase
    - "m" for multiline
    - "u" for unicode
    - "y" for sticky

 如果没有设置标志，则该值为空字符串。

      const regex1 = new RegExp('foo', 'ig');
      console.log(regex1.flags);
      // expected output: "gi"

      const regex2 = new RegExp('bar', 'myu');
      console.log(regex2.flags);
      // expected output: "muy"

      const regex3 = new RegExp('bar');
      console.log(regex3.flags);
      // expected output: ""

      const regex1 = new RegExp('foo', 's');
      console.log(regex1.dotAll);
      // expected output: true

      const regex2 = new RegExp('bar');
      console.log(regex2.dotAll);
      // expected output: false

      const regex1 = new RegExp('foo', 'd');
      console.log(regex1.hasIndices);
      // expected output: true

      const regex2 = new RegExp('bar');
      console.log(regex2.hasIndices);
      // expected output: false

      const str1 = 'table football';
      const regex1 = new RegExp('foo', 'y');
      regex1.lastIndex = 6;

      console.log(regex1.sticky);
      // expected output: true
      let ret = regex1.test(str1)
      console.log(ret);
      // expected output: true 

      regex1.lastIndex = 0;
      console.log(regex1.test(str1));

      const regex1 = new RegExp('foo', 'ig');
      console.log(regex1.source);
      // expected output: "foo"

      const regex2 = new RegExp('bar');
      console.log(regex2.source);
      // expected output: "bar"

      const regex3 = /\w+/gi;
      console.log(regex3.source);
      // expected output: "\\w+"

      const regex4 = new RegExp('\\d+', 'ig');
      console.log(regex4.source);
      // expected output: "\\d+"

      const regex1 = new RegExp('foo', 'g');
      console.log(regex1.global);
      // expected output: true

      const regex2 = new RegExp('bar');
      console.log(regex2.global);
      // expected output: false

      const regex1 = new RegExp('foo', 'i');
      console.log(regex1.ignoreCase);
      // expected output: true

      const regex2 = new RegExp('bar');
      console.log(regex2.ignoreCase);
      // expected output: false

      const regex1 = new RegExp('foo', 'm');
      console.log(regex1.multiline);
      // expected output: true

      const regex2 = new RegExp('bar');
      console.log(regex2.multiline);
      // expected output: false

      const regex = /ab/g;
      const str = 'ab ab ab';

      const result1 = regex.exec(str)!;
      console.log(result1.index);
      const ret1 = regex.lastIndex
      console.log(ret1);
      // expected output: 
      // result1.index: 0
      // regex.lastIndex: 2

      const result2 = regex.exec(str)!;
      console.log(result2.index);
      let ret2 = regex.lastIndex
      console.log(ret2);
      // expected output: 
      // result2.index: 3
      // regex.lastIndex: 5

      const result3 = regex.exec(str)!;
      console.log(result3.index);
      let ret3 = regex.lastIndex
      console.log(ret3);
      // expected output: 
      // result3.index: 6
      // regex.lastIndex: 8

      const pattern1 = new RegExp('hello');
      const result1 = pattern1.exec('hello world')!;
      console.log(result1[0]) //'hello'
      console.log(result1.index) //0

      const str = 'table football';
      const regex = new RegExp('foo*');
      const globalRegex = new RegExp('foo*', 'g');

      console.log(regex.test(str));
      // // expected output: true

      console.log(globalRegex.lastIndex);
      // // expected output: 0

      console.log(globalRegex.test(str));
      // // expected output: true

      console.log(globalRegex.lastIndex);
      // // expected output: 9

      console.log(globalRegex.test(str));
      // // expected output: false

// 创建Kotlin HashSet
let kotlinSet = new kotlin.collections.HashSet<string>()
kotlinSet.add("a")
kotlinSet.add("b")
// 转换为 UTS Set
let utsSet = new Set<string>()
utsSet.addAll(kotlinSet)
console.log(utsSet)
// UTS Set 转换为 Kotlin HashSet
let nextKotlinSet = new kotlin.collections.HashSet<string>()
nextKotlinSet.addAll(utsSet)
console.log(nextKotlinSet)

// 创建Kotlin HashSet
var kotlinSet = kotlin.collections.HashSet<String>();
kotlinSet.add("a");
kotlinSet.add("b");
// 转换为 UTS Set
var utsSet = Set<String>();
utsSet.addAll(kotlinSet);
console.log(utsSet, " at pages/index/helloView.uvue:35");
// UTS Set 转换为 Kotlin HashSet
var nextKotlinSet = kotlin.collections.HashSet<String>();
nextKotlinSet.addAll(utsSet);
console.log(nextKotlinSet, " at pages/index/helloView.uvue:38");