Programmer Think

1. Why upgrade nginx smoothly As nginx becomes more and more popular, and the advantages of nginx become more and more obvious, the version iteration of nginx also comes to the acceleration mode. Version 1.9.0 of nginx updates many new functions, such as the four-tier agent function of stream. With the wide application of nginx, the version up ...

Use of File class java.io.File class: the abstract representation of file and file directory path, which is platform independent File can create, delete and rename files and directories, but file cannot access the file content itself. If you need to access the file content itself, you need to use input / output streams. To represent a real Fil ...

01. Preface In the near future, it is expected that the emerging digital gene expression (DGE) technology will surpass microarray technology in many applications of functional genomics. One of the basic data analysis tasks, especially gene expression research, involves determining whether there is evidence that transcripts or exons are signifi ...

Node. The napi of JS greatly facilitates the writing of c++ addon, making users no longer need to face complex v8. This paper analyzes the use of napi and what napi does through an example. 1. Functions exported to js #include <node_api.h> NAPI_MODULE(NODE_GYP_MODULE_NAME, Init) The above code is a general pattern when using napi. We ...

35. Search insertion position (simple) Given a sort array and a target value, find the target value in the array and return its index. If the target value does not exist in the array, return the position where it will be inserted in order. You must use an algorithm with a time complexity of O(log n). This is an ordinary binary search. When ...

Phoenix What is Phoenix Phoenix is an open source SQL Engine Based on HBase. You can use standard JDBC API instead of HBase client API to create tables, insert data and query your HBase dataPhoenix is written entirely in Java as a JDBC Driver embedded in HBase. The Phoenix query engine converts the SQL query into one or more HBase scans and c ...

1. SpringBoot Javase:OOP mysql: persistence html+js+css+jquery + framework = view, unskilled framework, poor css javaweb: a website that independently develops MVC three-tier architecture ssm: framework, which simplifies our development process and makes the configuration more complicated war: tomcat running Spring re simplification: spr ...

Preface In my recent articles about preparing for an Android interview, I found that Framework is a very important point that many large companies value. As shown in the picture, this is a conversation within one of our technical exchange groups_ In the Android technology article I wrote a while ago, I read thousands of articles about Fram ...

Coding rules It is recommended to explicitly define @ charset "encoding name" at the beginning of the code, Enable SASS to compile the output according to the given character set. variable $font-stack: Helvetica, sans-serif; $primary-color: #333; body { font: 100% $font-stack; color: $primary-color; } body { font: 100% ...

1. Tree object introduction The Git object type to be discussed next is tree object, which can solve the problem of saving file names. Tree objects can store file names and also allow us to organize multiple files together. Git stores content in a way similar to the UNIX file system, but with some simplification. All contents are stored i ...