Programmer Group

1. Overview To improve network performance optimization, it is very important to reduce latency and improve response speed. Usually, when we make a request in the browser, the header part is like this Keep alive is to keep a long connection between the browser and the server, which can be reused. It is enabled by default in HTTP 1.1. Why does ...

Every network request is a request. Request is the encapsulation of URL, method, header and body. It is also the encapsulation of request line, request header and entity content in Http protocol public final class Request { private final HttpUrl url; private final String method; private final Headers headers; private final RequestB ...

1. Common built-in objects The so-called built-in objects are some objects provided by ECMAScript. We know that all objects have corresponding properties and methods. 1.1 Array 1.1.1 array creation method Create in a literal way (recommended). var colors = ['red','color','yellow']; Use the constructor (later on) to create, and use the new key ...

Introduce to you The git flow branch model is believed to have been heard more or less by everyone. Let's start with Zhang Tu Townhouse: It doesn't matter if I don't understand the diagram above (I don't know==), but today I'm talking about the git-flow command line tool developed from this branch model.Just remember a few simple commands to s ...

Click the blue words above to follow us Welcome to my public address, Python. 01 Some ideas Today, I will not update the flash tutorial for the time being. Today, I write an article to introduce the idea of doing a day's kui component chemistry library. In fact, there is a vague feeling that I want to have my own component chemistry library, wh ...

Original from: http://www.tanjp.com/archives/144 (immediate fix and update)   Doublecachequeue Double buffer, so the idea is to have two buffers (A and B for short). These two buffers are always one for the producer and one for the consumer. When the buffer triggers a condition, a switch is made (the previously written by t ...

order This paper mainly studies the consumeThread of rocketmq DefaultMQPushConsumer rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/consumer/DefaultMQPushConsumer.java public class DefaultMQPushConsumer extends ClientConfig implements MQPushConsumer { private final InternalLogger log = ClientLogger.getLog(); //...... ...

Merge order: 1. It is a sort algorithm based on merge operation, which is an application of divide and conquer method 2. Steps: Assume that the sequence to be sorted is R[0...n-1], and adopt two-way merge a. divide r into two subsequences R1, R2 with the same growth or the same difference of 1 b. divide the subsequences R1 and R2 recursive ...

concept Nonpartitioned tables can be converted to partitioned tables online. Indexes are maintained as part of this operation and can be partitioned as well. The conversion has no impact on the ongoing DML operations. You can convert non partitioned tables to online partitioned tables. Indexes are maintained as part of the op ...

Simple selection sorting One minimum at a time Time complexity o(n^2), space complexity o(1) void selectsort(int a[], int n) { int min; for (int i = 0; i < n; i++) { min = i;// for (int j = i + 1; j < n; j++) if (a[j] < a[min])min = j;//Find minimum if (min != i)swap(a[i], a[min]);//Put the minimum val ...