6.分组和分支结构.html 912 B

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  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8">
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6. <title>Document</title>
  7. </head>
  8. <body>
  9. <script>
  10. // const reg = /(ab)+/
  11. // console.log(reg.test('ab'))
  12. // console.log(reg.test('abab'))
  13. // console.log(reg.test('aabbab'))
  14. // const reg = /^(\d{4})-(\d{2})-(\d{2})$/
  15. // const data = '2023-12-13';
  16. // // console.log(reg.test(data))
  17. // // 12/13/2023
  18. // console.log(data.replace(reg,'$2-$3-$1'))
  19. const reg = /西游记|红楼梦/
  20. const str1 = '西游记'
  21. const str2 = '水浒传'
  22. const str3 = '红楼梦'
  23. const str4 = '三国演义'
  24. console.log(reg.test(str1))
  25. console.log(reg.test(str2))
  26. console.log(reg.test(str3))
  27. console.log(reg.test(str4))
  28. </script>
  29. </body>
  30. </html>