I saw this code in the code today:
typedef typename RefBase::weakref_type weakref_type;
At first I couldn’t figure out why I wanted to add a typename, but later I searched it to find out that the keyword was purposeful:
If you don’t add this keyword, the compiler doesn’t know what RefBase:: weakref_type is. It may be static member variable, or static member function, or internal class.
Add this keyword to manually tell the compiler: RefBase:: weakref_type is a type.
Example:
template<typename T>
class A {
public:
typedef T a_type;
};
template<...
In web design, the use of position attributes is very important. Sometimes, if we do not know this property clearly, it will bring us many unexpected difficulties.
positionThere are four different ways to locate attributes: static, fixed, relative, absolute and sticky. Finally, we will introduce the Z-index attribute closely related to the position attribute.
Part one: position: static
staticLocation is the default value of the HTML element, that is, no location, and the element appears in the normal stream.，Therefore, this positioning will not be affected by top, bottom, lef...
1.explode
hive wikiThe explanation for expolde is as follows:
explode() takes in an array (or a map) as an input and outputs the elements of the array (map) as separate rows. UDTFs can be used in the SELECT expression list and as a part of LATERAL VIEW.
As an example of using explode() in the SELECT expression list, consider a table named myTable that has a single column (myCol) and two rows:
Then running the query:
SELECT explode(myCol) AS myNewCol FROM myTable;
1
will produce:
The usage with Maps is similar:
SELECT explode(myMap) AS (myMapKey, myMapValue) FROM myMapTable;
1
To sum u...
First, attach a small example of recursion and circulation.
public static void main(String[] args) {
int recursion = recursion(1, 6, 0);
int loop = loop(1, 6, 0);
System.out.println("Output recursive result: + recursion);
System.out.println("Output loop results: "+ loop);
}
/**
* y>x,Sum and recursion of x+ (x+1) + (x+2) +... +y*@author LinWenLi
* @date 2018August 31st, 9:05:24 a.m.*@param xInitial value of a plus*@param yMaximum plus value*@param sumInitial value of sum*@return int
*/
public static int recursion(int x,int y,int sum){
sum = sum + x++;
if ...
ortainer（Go is a lightweight Web management interface that allows you to manage easily.Docker Host orSwarm Cluster.
At present, many browsers have strengthened the security of HTML and require the configuration of HTTPS.
The following example is the Apache configuration HTTPS process on CentOS7.
First, generate certificates.
Using OpenSSL to generate key and certificates:
mkdir /etc/ssl/private
chmod 700 /etc/ssl/private
openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/ssl/private/apache-selfsigned.key -out /etc/ssl/certs/apache-selfsigned.crt
openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048
Two. Install and configure SSL module.
yumInstallation module
yum install mod_ssl
vim /etc/h...
Overview:
Use JSTL & lt in the JSTL view parser of spring mvc; fmt: message key =”& gt; & lt; / FMT & gt; display correctly without binding, but show errors in the titleMistaken,
Usually we encounter scrambling code is a direct check coding problem, for this I delayed nearly 3 hours, really hateful, it is good to bind directly here;
1 <fmt:bundle basename="messages">
2 <fmt:message key="messages.username"></fmt:message>
3 </fmt:bundle>
Outline diagram:
Basic configuration diagram:
This is only a corresponding functio...
git submodule Quote
$ git help submodule
$ git submodule add https://github.com/aditya-grover/node2vec.git node2vec
