Programmer Think

1, Windows system Oracle provides the function of starting with the startup of the operating system. There are different setting methods in Windows and Linux. In windows, you can modify "my computer – > management – > services – > oracleservice $oracle_sid", or directly use Win+R to open the running wi ...

XGboost related learning from xgboost import XGBRegressor as XGBR from sklearn.ensemble import RandomForestRegressor as RFR from sklearn.linear_model import LinearRegression as LinearR from sklearn.datasets import load_boston from sklearn.model_selection import KFold, cross_val_score as CVS, train_test_split as TTS from sklearn.metrics import ...

We often use generics in Android development, such as List, Map, Set, Adapter, etc. generics are also supported in Kotlin. What is generics? Generics: special types that postpone the type specific work until the object is created or the method is called. 1, Defining generic methods in Kotlin Defining generics in Kotlin is the same as Java in ...

Title Description: Algorithm design: Multi process: Here we mainly use the system call fork: fork is a system call to create a process under Linux The process calling fork is the main process, and a call will produce a child process.fork features: call twice and return: The difference between the main process and the child process starts wi ...

preface This blog post mainly introduces the function definition of Go language and its usage. Declaring and using functions In Go language, the format of function declaration is as follows: func function_name([parameter list])[return_types]{ //Function body } When you use the compiler for development, such as GoLand, you will find t ...

You've used axure7 Product managers of 0 and 8.0 or counterparts related to prototypes must know that index. 0 was opened before HTML will generally jump to chrome HTML page or guide you to install the extension of Axure For Chrome. But Axure's official extension is launching axure9 It has been invalid since 0, and Chrome plug-in no longer s ...

Deploy multiple Web applications on one server through Nginx Through the reverse proxy of nginx, you can listen to the two default ports 80(http) and 443(https), and then map the two port requests to the actual running port of the project. First of all, it is explained here that multiple items of reverse proxy can be distinguished through the ...

2.2: project codes Clone and Push Suppose yqc user is a developer, and now he wants to write code for test-app1 under test software. The client PC address used is node111 (192.168.1.111). 2.2.1: Clone project 2.2.1.1: Clone with HTTP 2.2.1.1.1: copy the HTTP clone link of the item Log in to gitlab with yqc user, enter the test software / ...

Introduction: Ruby is one of the most popular languages today. It has a concise syntax and is the language behind the Ruby on Rails framework. In this article, we will show you three ways to install Ruby on CentOS 8. For image download, domain name resolution and time synchronization, please click Alibaba open source mirror station Ruby is ...

1. Overview of constraints 1.1 why constraints are needed Data Integrity refers to the Accuracy and Reliability of data. It is proposed to prevent the existence of data that does not comply with the semantic provisions in the database and to prevent invalid operation or error information caused by the input and output of error information. I ...