Programmer Think

Wechat Text Message Sending: In order to send pictures and text messages, we need to know several interfaces, active and passive sending. The active meaning here is the public number of pictures and text messages, which are sent to the concerned users actively. The passive meaning is the message that the service number replies to the user when ...

Two days ago, in the process of job interview, I was asked about binary tree and algorithm related by a big data company. I didn't learn it well in college. After several years of work, I usually use less, but I can't write it down. Because work always starts with Array, ArrayList, HashMap and HashSet, no matter what type, as if there were no ...

The shortest path problem aims to find the shortest path between two nodes in the graph. There are four commonly used algorithms. Note whether the graph is undirected or directedDijkstra's 1 Dijkstra's algorithm solves the shortest path from a single source point to another vertex in the graph. It can only solve the problem of non-negative wei ...

Create arrays Use literal grammar and Array() constructors. Literal Using array literals is the easiest way to create arrays. You can use all the elements in square brackets to separate them. var s = [];//Empty array var s = [1,1,1,1,1]//An array with five values. Although javascript arrays are ordered lists of data in other languages, ...

In the previous chapter, there are children's shoes that mention why not jump by routing?Actually, what I want to say is that this sharing is just beginning. Don't worry!In this section, we'll walk you through creating the header component and tabbar routing jumps. https://segmentfault.com/a/1190000008491055 vue catalog:1-vuej ...

[BZOJ2553] [BeiJing 2011] Taboos Description People on Magic Land always mention the legend that their ancestor John helped Koishi and his sister Satori eventually draw on the eastern island. Then Koishi regained the ability to read the mind... Now, in an era when John had become a legend, people who visited the island again found Koishi ...

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 ...

Algorithmic Training Tricky and Clever Password Time limit: 2.0s memory limit: 256.0MB Problem Description When we were young, the hero in our story, King Copa, had his personal data not completely hidden.This is unacceptable to him.As a result, he developed a password that was ...

Media Query If you've used the bootstrap framework, you should be familiar with media queries!(Link to bootstrap: bootstrap Chinese Network) Volume queries are CSS styles that can be set based on the characteristics of the device's display (viewport width, screen scale, device orientation - horizontal or vertical, etc.) Why does responsive des ...

Recently I feel that I can't learn much in my work, I am busy starting to change my work, and I am not very solid in my study. I have already started to fill in the things that were backward before. Updating my blog may gradually become less and less. Although I should start writing, I feel very shallow in my knowledge, and I don't understand e ...