13_Set.html 638 B

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  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8">
  5. <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7. <title>Document</title>
  8. </head>
  9. <body>
  10. <script>
  11. var arr = [1,2,3,1,2,3,4]
  12. var x = new Set(arr)
  13. var arr2 = Array.from(x)
  14. console.log(arr2)
  15. function quchong(arr){
  16. return Array.from(new Set(arr))
  17. }
  18. console.log(quchong([1,2,23,4,56,7,7,123,14,4,5,5,6]))
  19. var s1 = new Set([1,2,3,4])
  20. console.log(s1)
  21. s1.add(8)
  22. console.log(s1)
  23. s1.delete(1)
  24. console.log(s1)
  25. </script>
  26. </body>
  27. </html>