Programmer Think

From finger-to-finger contact to MotionEvent being transmitted to Activity or View, what exactly happened in the middle? How did touch events come about in Android? Where is the source? In this paper, the whole process is described intuitively, not for understanding, but for understanding. Android Touch Event Model Touch events mus ...

Articles Catalogue 1. Common Column parameters 2. query query function use 3. Common filter conditions of filter method 4. SQLALchemy Implementing Foreign Key and Its Four Constraints 5. ORM-level foreign keys and one-to-many relationships 6. ORM-level foreign key and one-to-one relationship implemen ...

Introduction to iSCSI iSCSI (Internet Small Computer System Interface, pronounced / sk zi/), Internet Small Computer System Interface, also known as IP-SAN, is a storage technology based on the Internet and SCSI-3 protocol. It was proposed by the IETF and became an official standard on February 11, 2003. iSCSI is a TCP/IP-based protocol for es ...

Java Mail Sending Principle of E-mail Sending We write to pen pals: Write a letter - > Put it in the mailbox - > pick it up at the local post office - > Pass it to the post office where the recipient is located - > Put the envelope in the mailbox of the recipient's family - > Pen pal ...

MNIST Handwritten Digital Set MNIST is a handwritten digit recognition data set developed by the U.S. Postal System. Handwritten content is 0-9, there are 60,000 image samples, we can get MNIST official website Free download, a total of 4. gz suffix compression files, which are binary content. train-images-idx3-ubyte.gz Picture samples for tr ...

Preface First, this article describes only the Session field in cookie s. The Session object I understand is the configuration information needed to store specific user sessions. When a user jumps over a Web page, Session will not be lost, it will always exist. When a user requests to a Web page, if the user does not have a session, the server ...

If you are reading this article, I believe you already know your needs. Before version 5.5 of mysql, modifying the table structure, such as adding indexes and modifying columns, required locking tables, which could not be written during the period, which was a disaster for large tables. From 5.5, especially 5.6, the situation has improved. On ...

In the DWZ document, the refreshless form submission process for the DWZ framework Ajax is described as follows: 1. The ajax form is submitted to the server 2. The server returns a fixed format json structure 3. The js tuning function processes the json data accordingly Be careful: The default ajax form submission of the DWZ f ...

Recent classes are always unable to remember which classroom, I feel it is very troublesome to visit the website of the Academic Affairs Office manually every time. It happened that I was learning to crawl, so I wanted to write a crawler to help me look up the information on the timetable. Do as you say. With requests, a third-party library th ...

1 HTTPS and SSL/TSL Secure Sockets Layer (Secure Sockets Layer), because the HTTP protocol used on the Internet is plain text, there are many shortcomings, such as transmission content will be peeped and tampered with. The role of the SSL protocol is to encrypt the network connection at the transport layer. By 1999, because of its wide applicat ...