Day 58: getting started with Web development Django

by Aurora Today, I'd like to introduce Django, another web development framework of Python. It is an open-source Web application framework customized based on python. It originated from an online news web site at first, and then opened up in 2005. Django has large and comprehensive functions. It provides a one-stop solution, which allows devel ...

Posted on Sun, 31 May 2020 23:11:44 -0700 by captainplanet17

C ා customize the progress bar control according to the BackgroundWorker asynchronous model and ProgressBar control

C ා customize the progress bar control according to the BackgroundWorker asynchronous model and ProgressBar control prefaceIn the process of program development, it is inevitable that some business logic or algorithms will generate time-consuming operations that can be perceived by people, such as complex logic processing in the loop; obtainin ...

Posted on Sun, 31 May 2020 20:13:57 -0700 by centenial

Detailed explanation of single line function operation in Oracle

Single line function -- PL/SQL (1) Character function Function number Say clearly  CONCAT Concatenate two strings, same as |  INITCAP Change the first letter of the string to uppercase  INSTR Find the position of a string  LENGTH Give the length of the string in characters   ...

Posted on Sun, 31 May 2020 08:55:23 -0700 by rushenas

type column parsing of explain

1,const Indicates that the execution step returns at most one row of data. const usually appears in the equivalent query of the primary key or unique index, such as the equivalent query of the primary key id of the t table:It can be considered that it is as fast as a rocket to locate a record by comparing the equivalence between the primary key ...

Posted on Sun, 31 May 2020 08:54:20 -0700 by a.heresey

android selects pictures from local album uri Samsung mobile phone adaptation problem

Reprint address: http://blog.csdn.net/CathyChen0910/article/details/62456438 Start system album intent Intent intentFromGallery = new Intent(); if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {//4.4 and above intentFromGallery.setAction(Intent.ACTION_PICK); } else {//Below 4.4 intentFromGallery.setA ...

Posted on Sun, 31 May 2020 08:13:53 -0700 by div

android selects pictures from local album uri Samsung mobile phone adaptation problem

Reprint address: http://blog.csdn.net/CathyChen0910/article/details/62456438 Start system album intent Intent intentFromGallery = new Intent(); if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {//4.4 and above intentFromGallery.setAction(Intent.ACTION_PICK); } else {//Below 4.4 intentFromGallery.setA ...

Posted on Sun, 31 May 2020 08:05:05 -0700 by funkyfela

Java fresh e-commerce platform - fresh e-commerce distribution order solution (Applet / APP)

Java fresh e-commerce platform - fresh e-commerce distribution order solution (Applet / APP)   Note: in the daily fresh e-commerce platform, fresh distribution is an unavailable link. According to the actual business scenario, fresh distribution has two dimensions to consider 1. Time dimension. Note: the time dimension refers to when customers ...

Posted on Sun, 31 May 2020 07:43:40 -0700 by bhi0308

Spring Data Rest encounters a composite primary key

If the project persistence layer uses Spring Data JPA and some data tables contain composite primary keys (Union primary keys), how can the interface generated by Spring Data Rest access the data corresponding to a primary key in these data tables? Suppose the database has two data tables film with compound primary key ...

Posted on Sun, 31 May 2020 03:18:38 -0700 by TheSeeker

Spring Data Rest encounters a composite primary key

If the project persistence layer uses Spring Data JPA and some data tables contain composite primary keys (Union primary keys), how can the interface generated by Spring Data Rest access the data corresponding to a primary key in these data tables? Suppose the database has two data tables film with compound primary key ...

Posted on Sun, 31 May 2020 02:44:39 -0700 by volleytotal.ch

The modified character set code of MySQL 5.6 under Linux is UTF8 (to solve the problem of Chinese code scrambling, it can be used for personal test!)

The modified character set code of MySQL 5.6 under Linux is UTF8 (to solve the problem of Chinese scrambling) 1, Log in to MySQL to view SHOW VARIABLES LIKE 'character%'; the following character set is displayed as follows:+--------------------------+----------------------------+ | Variable_name | Value | +--------------------------+---------- ...

Posted on Sat, 30 May 2020 22:14:46 -0700 by Bob Norris