大约有 44,484 项符合查询结果（耗时：0.0323秒） [XML]
Is it good practice to make the constructor throw an exception? [duplicate]
Is it a good practice to make the constructor throw an exception?
For example I have a class Person and I have age as its only attribute. Now
I provide the class as
...
Best way to synchronize local HTML5 DB (WebSQL Storage, SQLite) with a server (2 way sync) [closed]
I am developing a mobile web application (for iPhone & Android) with a local database (using html5 webstorage) so my app is still usable when the user is offline.
...
Using the “final” modifier whenever applicable in Java [closed]
...
I think it all has to do with good coding style. Of course you can write good, robust programs without using a lot of final modifiers anywhere, but when you think about it...
Adding final to all things which should not change simpl...
Facebook database design?
...able that holds the UserID and then the UserID of the friend (we will call it FriendID). Both columns would be foreign keys back to the Users table.
Somewhat useful example:
Table Name: User
Columns:
UserID PK
EmailAddress
Password
Gender
DOB
Location
TableName: Friends
Co...
How did I get a value larger than 8 bits in size from an 8-bit integer?
I tracked down an extremely nasty bug hiding behind this little gem. I am aware that per the C++ spec, signed overflows are undefined behavior, but only when the overflow occurs when the value is extended to bit-width sizeof(int) . As I understand it, incrementing a char shouldn't ever be undefin...
To ternary or not to ternary? [closed]
...rsonally an advocate of the ternary operator: () ? : ; I do realize that it has its place, but I have come across many programmers that are completely against ever using it, and some that use it too often.
...
Filter by process/PID in Wireshark
...
I don't see how. The PID doesn't make it onto the wire (generally speaking), plus Wireshark allows you to look at what's on the wire - potentially all machines which are communicating over the wire. Process IDs aren't unique across different machines, anyway.
...
What is @ModelAttribute in Spring MVC?
...property of the Model object (the M in MVC ;)
so let's say we have a form with a form backing object that is called "Person"
Then you can have Spring MVC supply this object to a Controller method by using the @ModelAttribute annotation:
public String processForm(@ModelAttribute("person") Person per...
Finding duplicates in O(n) time and O(1) space
...nput: Given an array of n elements which contains elements from 0 to n-1, with any of these numbers appearing any number of times.
...
Would it be beneficial to begin using instancetype instead of id?
...at, as far as I can see, replaces id as a return type in -alloc and init .
4 Answers
...