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Facebook Post Link Image
...
The easiest way is just a link tag:
<link rel="image_src" href="http://stackoverflow.com/images/logo.gif" />
But there are some other things you can add to your site to make it more Social media friendly:
Open Graph Tags
Open Graph tags are tags that you add to the <...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...tp://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"
>
<!-- Config here. -->
</web-app>
Or, in case you're not on Servlet 3.0+ yet (e.g. Tomcat 6 or older), then remove the @WebServlet annotation.
package com.example;
public cl...
What are the differences between utf8_general_ci and utf8_unicode_ci? [duplicate]
...
utf8_general_ci is a very simple — and on Unicode, very broken — collation, one that gives incorrect results on general Unicode text. What it does is:
converts to Unicode normalization form D for canonical decomposition
re...
structure vs class in swift language
...mple here code to understand well.
struct SomeStruct {
var a : Int;
init(_ a : Int) {
self.a = a
}
}
class SomeClass {
var a: Int;
init(_ a: Int) {
self.a = a
}
}
var x = 11
var someStruct1 = SomeStruct(x)
var someClass1 = SomeClass(x)
var someStruct2 = someStruct1
var someClass2 = so...
How to change MenuItem icon in ActionBar programmatically
...thod
menu.getItem(0).setIcon(ContextCompat.getDrawable(this, R.drawable.ic_launcher));
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Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
....
public class ThingMaker {
public ThingMaker(IThingSource source){
_source = source;
}
public static ThingMaker CreateDefault() {
return new ThingMaker(new DefaultThingSource());
}
}
Obviously this doesn't eliminate your dependency, but it does make it clearer to me that this ob...
Why should hash functions use a prime number modulus?
...e comes out to be a factor of the bucket count then you can only do (bucket_count / stride) probes before you're back where you started. The case you most want to avoid is stride = 0, of course, which must be special-cased, but to avoid also special-casing bucket_count / stride equal to a small inte...
Difference between a “coroutine” and a “thread”?
...ot involved in the coroutine switches.
—http://www.boost.org/doc/libs/1_55_0/libs/coroutine/doc/html/coroutine/overview.html
A language that supports native threads can execute its threads (user threads) onto the operating system's threads (kernel threads). Every process has at least one kerne...
How do you use bcrypt for hashing passwords in PHP?
...s have now been built directly into PHP >= 5.5. You may now use password_hash() to create a bcrypt hash of any password:
<?php
// Usage 1:
echo password_hash('rasmuslerdorf', PASSWORD_DEFAULT)."\n";
// $2y$10$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// For example:
// $2y$10$.vGA...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...个别名，编号和别名的对应关系在linux下放在/etc/iproute2/rt_tables这个文件里，一般0编号
的table对应的别名为upspec，255编号对应的别名为local，254和253对应的别名分别为main和default，我们通常用route命令配置和查看的路由表信息为别...