Author: Zen and the Art of Computer Programming
1 Introduction
Software Customization Development (Software Customization Development) is a development method that meets your own customized needs or solves the needs of specific products or services by modifying the software source code or adding functions. Compared with higher-cost and more complex development models such as software outsourcing and system integrators, software customization development can save resources, shorten the development cycle, and improve work efficiency. Customized software development usually requires a high degree of programming ability, application knowledge and communication skills to get started quickly. More professional skills will also satisfy customers. Therefore, most companies will give priority to this service when choosing custom development.
This article will introduce software customization development from the following three aspects:
Ⅰ. How programmers can achieve financial freedom - This part will introduce readers to how to start their own software customization projects. Introduce how to choose the language, development environment, API and other tools that suit you, and use cloud servers to complete your own customized software development.
Ⅱ. Core algorithm principles and specific operations - This part will elaborate on the principles of algorithms involved in custom development and how to implement these algorithms using programs.
Ⅲ. Frequently Asked Questions and Answers - Here we will collect some common questions and answers for readers' reference.
2. How programmers can achieve financial freedom
2.1 Basic knowledge preparation
First of all, readers need to master some basic computer-related knowledge, including computer structure, network communication protocols, database management, data structures, algorithms, compilation principles, operating systems, etc. If readers do not know this knowledge, they can go to websites in various fields to learn.
2.2 Explanation of conceptual terms
2.2.1 API
Application Programming Interface (Application Programming Interface) is a computer software component that defines certain functions, procedures or services that other programs can call through the interface to achieve information sharing and exchange. Today, the Internet has become a part of people's lives, and various applications provide users with API interfaces, which allow programs to communicate with each other. Many times, in order to ensure the competitiveness and market share of its own products, companies need to open their internal system interfaces and provide them to partners. This is also a keyword often used in software customization development.
2.2.2 Backend business
Back-End Business refers to computer software, hardware and related facilities used to perform management tasks and support system operation and maintenance. The backend business can be said to be the support layer of the software, responsible for data storage, processing, calculation, display and providing users with information services based on computer technology. Backend businesses often bear a large amount of computing resources and provide users with a wealth of services, such as e-commerce websites, microblog service systems, marketing platforms, payment systems, etc.
2.2.3 CTO
CTO (Chief Technology Officer), also known as Chief Technology Officer, is the director of enterprise technology and is mainly responsible for the direction, strategy, architecture design and management decisions of enterprise technology. In addition to general senior management responsibilities, the CTO is also responsible for the development direction of the entire technology and ensuring that the company's technology direction, strategy and implementation comply with national and regional policy requirements.
2.2.4 Computer
A computer is a device that can perform calculations according to computer instructions. From the earliest binary addition and subtraction machines to modern supercomputers, computers have gradually become more and more powerful and can handle a variety of computing tasks. According to the different environments in which computers are located, computers are divided into the following categories:
⒈ Personal computer (PC)
⒉ Tablet PC
⒊ Mobile phone
⒋ Smartphone
⒌ Server
Servers are often the infrastructure of cloud computing, consisting of a group of servers that provide unified computing resources, storage resources, network resources and security mechanisms to support business needs.
2.2.5 Database
Database (DataBase, DB) is a warehouse that organizes, stores and manages data according to a certain data structure. It is a collection of data that is stored in a computer for a long time, is organized, shareable, scalable and easy to retrieve. As the scale and complexity of enterprises increase, the amount of data becomes larger and larger. Currently, commonly used databases include relational databases, NoSQL databases and cloud-based databases.
2.2.6 Function library
Function Library is a set of pre-written programs that have been optimized and tested and can be easily called by users. Function libraries are generally used to improve programming efficiency and improve software development speed and quality. Many mainstream programming languages have corresponding function libraries, such as C/C++ standard library, Python standard library, etc.
2.2.7 HTML/CSS/JavaScript
HTML/CSS/JavaScript are the three major front-end technologies for building web pages. They are used to mark the content of the page, design the layout of the page, and control the behavior of the page. HTML is a markup language used to create web pages, including the presentation of various media such as text, pictures, audio, and video; CSS is a language that describes HTML styles, and the display effect of web pages can be beautified through style sheets; JavaScript is a scripting language for web pages. You can dynamically manipulate elements of web pages to achieve animation effects and interactive logic on web pages.
2.2.8 HTTP
HTTP (HyperText Transfer Protocol) is a communication protocol used on the Internet. It is a client-server model protocol that uses a simple, flexible, and easily scalable protocol format to make data transmission between the client and the server very fast, and data transmission on the Internet is effectively solved.
2.2.9 IDE
IDE (Integrated Development Environment) refers to an important part of the software development environment. It is used to integrate code editors, compilers, debuggers and other tools to improve developers' programming efficiency. Developers only need to focus on code writing and do not need to care about the underlying implementation details. The emergence of IDE can greatly improve developer efficiency. The current mainstream IDEs include Visual Studio, Eclipse, Xcode, Sublime Text, etc.
2.2.10 JSON
JSON (JavaScript Object Notation) is a lightweight data exchange format. It is based on a subset of ECMAScript. JSON uses a completely language-independent text format and uses curly brackets {} to save objects. JSON plays an important role in Web development. With the widespread application of AJAX technology, JSON has become the standard format for transmitting information between communicating parties.
2.2.11 Open source community
The Open Source Community is an open, transparent, and civil community whose purpose is to promote software innovation, collaborative research, share experiences, advocate creativity, and share knowledge. Currently the most popular open source community is GitHub.
2.2.12 SDK
SDK (Software Development Kit) software development kit is a collection of tool software, documents, sample codes, header files or libraries and other components required in the software development process. SDK is widely used in game development, hardware driver, system application software development and other fields.
2.2.13 SQL
SQL (Structured Query Language) is a language specifically used for accessing, managing, and manipulating relational databases. It is a standard computer language. Currently, SQL has become the most commonly used database language because it is easy to use, performant, structured, secure, and portable.
2.2.14 Browser
Browser is a software for accessing the Internet. It is used to obtain information, documents, videos or music from the World Wide Web (WWW) and display it on the screen. Currently, there are tens of billions of servers in the world connected to the Internet, but only a few thousand programmers can develop programs that can browse this information. Currently, the mainstream browsers include Google Chrome, Mozilla Firefox, Safari, Microsoft Edge, etc.
2.2.15 Data structure
Data structure refers to some rules about the storage, organization and processing of information. Data structure is an important branch of computer science, which studies how to divide data into several parts and establish certain connections. Data structures involve both the mathematical model of the computer and the physical implementation of the computer.
2.2.16 Modularization
Modularity is an important concept in software engineering. It refers to decomposing a large software system into different subsystems or modules. Each module only completes a related function, so that a complex system can be decomposed into Multiple simple subsystems are easier to manage and maintain.
2.2.17 MVC pattern
The MVC (Model-View-Controller) pattern is a design pattern that separates concerns. It divides the overall functionality of the application into three parts: Model, View and Controller. Among them, the model represents data and business logic, the view represents the user interface, and the controller is responsible for coordinating the interaction between the view and the model.
2.2.18 Software development process
Software Development Process refers to the entire process from requirements analysis to final release. It refers to the standardized methods for completing software development tasks, the work process for programmers to develop, and the working methods and tools developed for different stages and different members. The software development process generally includes steps such as requirements analysis, design, coding, testing, verification, and release.
2.2.19 User interface design
User Interface Design refers to the design process of the graphical user interface (GUI) of software products. GUI refers to the graphical interface through which users interact with computer software. It should be intuitive, easy to understand, easy to use, and meet the user's needs.
2.3 How do programmers start their own customized software development?
my country has a high degree of specialization in the software industry. Most domestic software companies have professional software development teams. They have formulated a complete software development process and carry out customized development as needed to develop software products that meet the business needs of the company. . Customized software development is a highly specialized job that requires programmers to have basic qualities and abilities. Below I will introduce how programmers can start their own customized software development:
① Select a programming language: First, you need to decide what programming language you want to use for software development. For example, Java, JavaScript, PHP, etc. Each programming language has its own advantages and disadvantages. Readers can choose the language that suits them according to their actual situation.
② Download the corresponding development tools: In the second step, you need to install the corresponding development tools, including compilers, integrated development environments (IDEs), debuggers, version control software, database management software, etc.
③ Register and log in to the cloud server: In the third step, you need to register and log in to the cloud server. Cloud servers can be obtained for free, or you can purchase cloud servers. After successful registration, you can develop software on the cloud server.
④ Configure the development environment: In the fourth step, you need to configure your development environment, set development environment variables, install necessary software packages, configure the database, install server software, etc.
⑤ Create database: In the fifth step, you need to create a database to store your data. You can use SQL commands to create a database, or you can use software tools to generate a database.
⑥ Obtain API: Step 6. If you need to use an external API interface, you need to register with the corresponding API provider and apply for an API Key. Then, you can call the external API interface through the API call function.
⑦ Write program code: In the seventh step, you need to write program code to realize your own software functions. This may require the use of mathematics, algorithms, data structures, databases and many other knowledge.
⑧ Test program: In the eighth step, you need to test whether your software can run normally. In order to ensure the usability of the software, you also need to write test cases and perform automated testing.
⑨ Submit the project: In the ninth step, you need to submit your project, notify the testers to test your software, and wait for the test results. If the testing finds no bugs, your software can be officially released.
The above are the general steps for programmers to start their own customized software development, but everyone's actual situation may be different. For example, some companies will provide special training courses for customized software development, and some companies will provide software development tool kits. Some companies will pay for custom software development. Therefore, you should choose your own custom software development platform based on your actual situation and your favorite programming languages, tools, and cloud servers.