pocket gems面经,必考题

1. {
   
2. "GB": {
   
3. "birmington": {"apple": "20", "google": "50", ....},. more info on 1point3acres.com
   
4. "london": {"apple": "110", "google": "70", ....},
   
5. },
   
6. 
   
7. "US": {
   
8. "new york": {"apple": "100", "google": "200", ....},
   
9. "san francisco": {"apple": "150", "google": "50", ....},
   
10. },
    
11. ....
    
12. ....
    
13. 
    
14. }
    
15. columns: ['country', 'city', 'store', 'rev']
    
16. output:
    
17. [{"city": "london", "country": "GB", "rev": "70", "store": "google"},
    
18. {"city": "london", "country": "GB", "rev": "110", "store": "apple"},
    
19. {"city": "birmington", "country": "GB", "rev": "50", "store": "google"},
    
20. {"city": "birmington", "country": "GB", "rev": "20", "store": "apple"},
    
21. {"city": "san francisco", "country": "US", "rev": "50", "store": "google"}, ....]
    
22. m cols n row
    
23. 
    
24. input: JSON apiData, String[] columns.
    
25.   
    
26. output: List<Hashtable<String, String>>
    
27. 
    
28. */
    
29. 
    
30. interface JSON { // base class for json data type
    
31. public JSON(String json); // constructor
    
32. public String toString(); // convert json data type to string that can be printed
    
33. public String type(); // return type
    
34. 
    
35. }
    
36. class JSONMapping extend JSON {
    
37. 
    
38. public JSON get(String key); // return value corresponding to the key
    
39. public String[] keys(); // return all the keys
    
40. public String type() {return "JSONMapping";}
    
41. }
    
42. 
    
43. 
    
44. class JSONString extend JSON {
    
45. 
    
46. public String value(); // return the string
    
47. 
    
48. public String type() {return "JSONString";}
    

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[size=11.000000pt]第二题是一道新题 你 有 [size=11.000000pt]json object json object [size=11.000000pt]可能会包

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[size=11.000000pt]的一堆函数啥的 电话面试必考题
                               
                       
               

..他家居然会换题？！

咦？我上周面了还是差不多原题啊，求楼主有poketgems的onsite资料么？

这道题咋做啊，楼主或其他层主有思路吗？看不太懂啊，电面第一轮必考吗？