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What's the best way to store Phone number in Django models
... likely to be the most universal way to store phone numbers, in particular if you have international numbers work with.
1. Phone by PhoneNumberField
You can use phonenumber_field library. It is port of Google's libphonenumber library, which powers Android's phone number handling
https://github.com...
How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
...ee https://blog.2ndquadrant.com/postgresql-10-identity-columns/.
For the difference between GENERATED BY DEFAULT and GENERATED ALWAYS, see https://www.cybertec-postgresql.com/en/sequences-gains-and-pitfalls/.
For altering the sequence, see https://popsql.io/learn-sql/postgresql/how-to-alter-sequen...
When would you use the Builder Pattern? [closed]
...
The key difference between a builder and factory IMHO, is that a builder is useful when you need to do lots of things to build an object. For example imagine a DOM. You have to create plenty of nodes and attributes to get your final o...
RegEx - Match Numbers of Variable Length
...
You can specify how many times you want the previous item to match by using {min,max}.
{[0-9]{1,3}:[0-9]{1,3}}
Also, you can use \d for digits instead of [0-9] for most regex flavors:
{\d{1,3}:\d{1,3}}
You may also want to consider...
How to open the default webbrowser using java
...ou're looking for.
import java.awt.Desktop;
import java.net.URI;
// ...
if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.BROWSE)) {
Desktop.getDesktop().browse(new URI("http://www.example.com"));
}
...
How to retrieve checkboxes values in jQuery
...ter another question was asked in regards to how to keep the above working if the ID changes. Well, the solution boils down to mapping the updateTextArea function into something generic that uses CSS classes, and to use the live function to monitor the DOM for those changes.
...
What is PEP8's E128: continuation line under-indented for visual indent?
...
PEP-8 recommends you indent lines to the opening parentheses if you put anything on the first line, so it should either be indenting to the opening bracket:
urlpatterns = patterns('',
url(r'^$', listing, name='investment-listing'))
or not putting any arguments...
Cloning a MySQL database on the same MySql instance
...p directly into the mysql client:
mysqldump db_name | mysql new_db_name
If you're using MyISAM you could copy the files, but I wouldn't recommend it. It's a bit dodgy.
Integrated from various good other answers
Both mysqldump and mysql commands accept options for setting connection details (an...
C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...线程从缓冲区中取出消息
MessageBuffer.h
//MessageBuffer.h
#ifndef _MESSAGE_BUF_INCLUDE_
#define _MESSAGE_BUF_INCLUDE_
#include <pthread.h>
#define MESSAGE_COUNT 16
#define MESSAGE_LENGTH 2048
class MessageBuffer{
private:
pthread_mutex_t mutex;//访问缓冲的互斥量
pt...
Compression/Decompression string with C#
...r1);
}
Remember that Zip returns a byte[], while Unzip returns a string. If you want a string from Zip you can Base64 encode it (for example by using Convert.ToBase64String(r1)) (the result of Zip is VERY binary! It isn't something you can print to the screen or write directly in an XML)
The vers...