Programmer Think

catalogue 1, What are built-in objects 2, Query document 2.1 MDN 2.2 how to learn methods in objects 3, Math object 3.1 Math overview 3.1.1 case exercise - encapsulating your own Math object 3.1.2 absolute value of math and three rounding methods 3.2 random number method (random) 3.2.1 case exercise - get a random number between two n ...

Unit 1: introduction to Google Earth engine Developed by the Colorado State University graduate degree program in ecology and the laboratory of natural resource ecology Authors: Peder Engelstad, Dan Carver Updated may 2021 1 Introduction2 background3 start using Google Earth engine 3.1 browsing user interface3.2 introducti ...

1. Server side basic concepts 1.1 IP address Unique identification of the device in the Internet. IP is the abbreviation of Internet Protocol Address, which represents the Internet Protocol Address. 1.2 domain name Because the IP address is difficult to remember, the concept of domain name came into being. The so-called domain name is t ...

Hello, I'm A bowl week , a front end that doesn't want to be drunk. If you are lucky enough to get your favor, I am very lucky~ Write in front When we write Vue2, the way to write components is to use the Options API. The feature of this way is to write corresponding function modules in the corresponding attributes, such as defining data in ...

prefaceAn old project of the company didn't do the verification before code submission. After I got it, I thought about the old project and didn't have time to help it with these. Anyway, I just changed a little something; Try to follow its code style and submit it after writing;Until one day, another person joined in. Good guy, something happe ...

Animation function encapsulation Animation implementation principle Core principle: continuously move the box position through the timer setInterval(). Implementation steps: Get the current position of the boxAdd 1 movement distance to the current position of the boxUse the timer to repeat this operation continuouslyAdd a condition to ...

1.TypeScript union type Resolution: the union type can set variables to multiple types through the pipeline (|), and the value can be assigned according to the set type. 2.TypeScript basic type Resolution: [1]Any type any: Declare as any A variable can be assigned any type of value [2]Number type number: Double precision 64 bit floating point ...

Chapter III Although the basic models have been created now, the main purpose of our 3D conference room is to place the items in the conference room and set the layout by ourselves. Therefore, we need to be able to drag the position and rotate the angle of the model in the conference room to achieve this highly free effect. drag DragCont ...

Naming conventions Project naming All are in lowercase. When multiple words are included, use the middle dash (-) to separate them. Example: my project name Directory naming Refer to project naming rules; When there is a plural structure, the plural naming method shall be adopted. Examples: utils, images, modes In vue's project, the comp ...

catalogue This article records the automated test script I wrote using Selenium. The function is to download files from the web page and upload the downloaded files to another page. At the same time, some problems and solutions encountered in the process of writing are recorded Download file function Google browser download settings Ent ...