Programmer Think

How many people want to develop a small program and find that their foundation is 0. Today, I would like to share with you an inspirational case: a girl who reads atmospheric science and teaches herself the front-end development, because she likes to browse and know, she has made a "imitation" small program. I hope her development e ...

1. json data type type describe Number Digital type String String type Boolean Boolean type Array array Object object null Null value (1) json does not distinguish between integer and decimal types, but uses Number to store numbers. (2) Array represents an array, enclosed in brackets "[]", separated by commas between ...

Reprinted: http://chenzhou123520.iteye.com/blog/1641319 I. Export tool mongoexport MongoDB The mongoexport tool can export a collection into JSON or CSV formats. You can export data items by specifying parameters, or you can export data by specifying conditions. The specific usage of mongoexport is as follows: [root@localhos ...

Catalog I. Objects 1.1 Ways to Get Attribute Values 1.2 Get the value of dynamically generated attributes Array 2.1 Check whether it is an array 2.2 Increasing array length results in undefined unassigned locations 2.3 Implementing Simple Iterator with Closure Scope 3.1 Function Scope (Local Variables) 3.2 There is no block-lev ...

Swagger Is a canonical and complete framework for generating, describing, invoking, and visualizing RESTful-style Web services.The overall goal is to have the client and file system update at the same speed as the server.The file's methods, parameters, and models are tightly integrated into the server-side code, allowing the API to stay in sync ...

Preface Grasping Data Analysis of grabbing bags Encryption Information Processing Grasp the Contents of Hot Comments Word Cloud Word Cloud Operation Effect summary Preface Netease Cloud Music has always been the "altar" I yearn for. When I listen to the music and see the commentary from the heart, it's a flowing m ...

Note: This series is based on Gson 2.4. The main contents of this paper are as follows: Several methods of field filtering Based on @Expose Annotation Version-based Access modifier-based Strategy-based (most commonly used by authors) Field mapping rules between POJO and JSON I. Several Methods of Field Filtration Field filterin ...

In the last blog, we mentioned how to use struts2+jquery+ajax to realize the transmission of ordinary json data. In practice, the front desk not only shows the value after logical processing. There are also query values from the database, such as hibernate database, which return a List's data structure after the query operation is completed, s ...

Preface Dagger2 relies on an injection framework to reduce program-to-program coupling and prevent potential systemic problems. In addition, it has many advantages:Increase development efficiency and eliminate repetitive simple manual labor The process of starting a new instance is a repetitive and simple manual effort, and dagger2 can do ex ...

SQL Terms/Concepts MongoDB Terms/Concepts Explanation/Explanation database database data base table collection Database tables/collections row document Data Record Row/Document column field Data Fields/Fields index index Indexes table joins Table connection, not supported by MongoDB primary key p ...