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java中的缓存技术该如何实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以共享memcached中的数据,这些应用都通过socket和基于 tcp/ip协议上层的memcached协议直接连接到memcached,有一个app更新了memcached中的值,所有的应用都能拿到最新的 值.虽然这个时候多了很多了网络上的开销,但是往往这种方案要比local...
Rails 4: List of available datatypes
...:date
:datetime
:decimal
:float
:integer
:bigint
:primary_key
:references
:string
:text
:time
:timestamp
Source: http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_column
These are the same as with Rails 3.
If you use PostgreSQL, you can also tak...
Practical non-image based CAPTCHA approaches?
...A support to Stack Overflow. This is necessary to prevent bots, spammers, and other malicious scripted activity. We only want human beings to post or edit things here!
...
How do I create my own URL protocol? (e.g. so://…) [closed]
...
(Default) here means empty string. Don't take it literally.
– deerchao
Apr 5 '13 at 9:02
|
s...
Get/pick an image from Android's built-in Gallery app programmatically
...r own action
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.Button01)
.setOnCl...
What is the difference between “expose” and “publish” in Docker?
I'm experimenting with Dockerfiles, and I think I understand most of the logic. However, I don't see the difference between "exposing" and "publishing" a port in this context.
...
How to validate a url in Python? (Malformed or not)
...
This allows everything. It returns True for the string fake or even for a blank string. There will never be any errors because those attributes are always there, and the list will always have a boolean value of True because it contains those attributes. Even if all of th...
Setting a timeout for socket operations
...
Use the Socket() constructor, and connect(SocketAddress endpoint, int timeout) method instead.
In your case it would look something like:
Socket socket = new Socket();
socket.connect(new InetSocketAddress(ipAddress, port), 1000);
Quoting from the do...
Passing a Bundle on startActivity()?
...ntent(this, Example.class);
Bundle extras = mIntent.getExtras();
extras.putString(key, value);
2) Create a new Bundle
Intent mIntent = new Intent(this, Example.class);
Bundle mBundle = new Bundle();
mBundle.putString(key, value);
mIntent.putExtras(mBundle);
3) Use the putExtra() shortcut meth...
Where is Erlang used and why? [closed]
...social bookmarking service, Delicious, which has more than
5 million users and 150 million bookmarked URLs.
• Facebook uses Erlang to power the backend of its chat service, handling more than
100 million active users.
• WhatsApp uses Erlang to run messaging servers, achieving up to 2 million c...