大约有 43,000 项符合查询结果（耗时：0.0572秒） [XML]
Can a constructor in Java be private?
...of delegating constructors, the following class allows you to save a value and a type, but it only lets you do it for a subset of types, so making the general constructor private is needed to ensure that only the permitted types are used. The common private constructor helps code reuse.
public clas...
Copy a file in a sane, safe and efficient way
... std::ios::binary);
dst << src.rdbuf();
}
This is so simple and intuitive to read it is worth the extra cost. If we were doing it a lot, better to fall back on OS calls to the file system. I am sure boost has a copy file method in its filesystem class.
There is a C method for intera...
What's the difference between event.stopPropagation and event.preventDefault?
They seem to be doing the same thing...
Is one modern and one old? Or are they supported by different browsers?
7 Answers...
How to add column if not exists on PostgreSQL?
...
Here's a short-and-sweet version using the "DO" statement:
DO $$
BEGIN
BEGIN
ALTER TABLE <table_name> ADD COLUMN <column_name> <column_type>;
EXCEPTION
WHEN duplicate_column THE...
External template in Underscore
...
EDIT: This answer is old and outdated. I'd delete it, but it is the "accepted" answer. I'll inject my opinion instead.
I wouldn't advocate doing this anymore. Instead, I would separate all templates into individual HTML files. Some would suggest ...
How large should my recv buffer be when calling recv in the socket library
...atagram socket (SOCK_DGRAM) - within TCP/IP, the former corresponds to TCP and the latter to UDP.
How do you know how big to make the buffer passed to recv()?
SOCK_STREAM: It doesn't really matter too much. If your protocol is a transactional / interactive one just pick a size that can hold the ...
UIRefreshControl without UITableViewController
...
On a hunch, and based on DrummerB's inspiration, I tried simply adding a UIRefreshControl instance as a subview to my UITableView. And it magically just works!
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refresh...
Has anyone actually implemented a Fibonacci-Heap efficiently?
...g/fibonacci_heap.hpp. This file has apparently been in pending/ for years and by my projections will never be accepted. Also, there have been bugs in that implementation, which were fixed by my acquaintance and all-around cool guy Aaron Windsor. Unfortunately, most of the versions of that file th...
window.close and self.close do not close the window in Chrome
...curity feature, introduced a while ago, to stop various malicious exploits and annoyances.
From the latest working spec for window.close():
The close() method on Window objects should, if all the following conditions are met, close the browsing context A:
The corresponding browsing cont...
How to terminate a Python script
I am aware of the die() command in PHP which exits a script early.
10 Answers
10
...