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js中 for in, for of
张浩刚
Original
1370 people have browsed it

for in 和 for of , 新功能:字符集 ``

  1. ``字符集,`这是新功能:${变量名} 不用“+”的连接符`
  2. ******************************
  3. let a = [
  4. {name:'张明轩', age:3},
  5. {name:'张明朗', age:1}
  6. ];
  7. //for( in ) 这里的i为数组a的键
  8. for(let i in a){
  9. document.write(
  10. ` //这个为js新功能,字符集,可以省略连接符+ , 变量使用: ${变量名}
  11. <ul>
  12. //这里调用的是数组下的对象类,i为键
  13. <li>姓名:${a[i].name} 年龄:${a[i].age}</li>
  14. </ul>
  15. `
  16. );
  17. }
  18. **********************************
  19. let b = ['张浩刚', 32];
  20. //for( of ) 下面的n直接就是b的值
  21. for(let n of b){
  22. document.write(
  23. `
  24. ${n}
  25. `
  26. );
  27. }
  28. ***********************************
  29. //这里使用for of 更方便
  30. let a = [
  31. {name:'张明轩', age:3},
  32. {name:'张明朗', age:1}
  33. ];
  34. for(let i of a){
  35. document.write(
  36. ` //这个为js新功能,字符集,可以省略连接符+ , 变量使用: ${变量名}
  37. <ul>
  38. //这里调用的是数组下的对象类
  39. <li>姓名:${n.name} 年龄:${n.age}</li>
  40. </ul>
  41. `
  42. );
  43. }
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