Programmer Think

This forecast relates to the marketing activities of Portuguese banking institutions. These marketing activities are generally based on telephone. The customer service personnel of the bank contact the customer at least once to confirm whether the customer is willing to buy the bank's products (time deposit). The basic type of task is classifie ...

Getting started with mobile security Writing Android programs The xml interface is similar to the web interface. Layout is layout and wrap_content is a filled layout, indicating that it is full <?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/re ...

1, Presto overview 1. Introduction to Presto Presto is an open source distributed SQL query engine, which is suitable for interactive analysis and query. The data volume supports GB to PB bytes. Although Presto has the ability to parse SQL, it does not belong to the standard database category. Presto supports online data query, including Hiv ...

Author: Tangyuan Personal blog: javalover.cc preface In the past, it was always called by friends, which was suspected of being close, so I'd better change the title for you later Because people come to see things, let's call them officials for the time being (inspired by Jin Ping Mei, one of the four famous works spread among the people) ...

TL;DR The knowledge of network is many and miscellaneous, and many of them are part of the system kernel. Originally, I didn't do network, and my knowledge of system kernel is also weak. But it is precisely these strange contents full of temptation, coupled with the current work is more related to the network, seize the opportunity to learn. ...

Learning content of the third week stm32 clock system Hardware STM32 has five clock sources: HSI, HSE, LSI, LSE and PLL. ① HSI is a high-speed internal clock and RC oscillator. The frequency is 8MHz and the accuracy is not high. ② HSE is a high-speed external clock, which can be connected to quartz / ceramic resonator or external clock Clock ...

catalogue 1. Type of document 1.1 procedure documents 1.2 data files 1.3 file name 2. Opening and closing of files 2.1 document pointer 2.2 opening and closing of documents 3. Sequential reading and writing of documents 4. Random reading and writing of documents 4.1 fseek 4.2 ftell 4.3 rewind 5. Text files and binary files 6. Dete ...

Mutually exclusive semaphore 1. Priority reversal Priority reversal is a common problem when using binary semaphores. It is very common in the deprivable kernel, but it is not allowed in the real-time system, because it will destroy the expected sequence of tasks and may lead to serious consequences. An example of priority reversal is shown ...

Question A: House plate making Problem solving ideas from[1,2020]Cycle and accumulate all the time. Code example public class House plate making { public static void main(String[] args) { int sum = 0; for (int i = 1; i <= 2020; i++) { int x = i; while (x > 1){ if(x % 10 == ...

Those who are familiar with the drawing process know that ViewGroup can decide the drawing time and call times of child. Today we will start from LinearLayout Start learning and see how many times it calls onMeasure for the child View. For simplicity, we choose the time to enter the Activity in the previous blog When entering Activity, why is ...