P5.js由McCarthy和纽约大学ITP以及其他贡献者共同合作开发,它是一个能够处理可视化编程语言的分支,它使非程序开发人员(如艺术家、设计师、教育工作者和初学者等)能够编写JavaScript代码和创建可视化项目。本课程为Daniel Shiffman老师的p5.js教程。原链接在这:https://ww
It converts a nonboolean to an inverted boolean (for instance, !5 would be false, since 5 is a non-false value in JS), then boolean-inverts that so you get the original value as a boolean (so !!5 would be true). 解答2 ! is "boolean not", which essentially typecasts the value...
}else{// 是否是文件:console.log('isFile: '+ stat.isFile());// 是否是目录:console.log('isDirectory: '+ stat.isDirectory());if(stat.isFile()) {// 文件大小:console.log('size: '+ stat.size);// 创建时间, Date对象:console.log('birth time: '+ stat.birthtime);// 修改时间, Date...
to convert this HMAC_SHA256 to WebCrypto API, I found this code snippet, I am passing the secret as a string but can't make exact same output, so I see the difference is here crypto-js is converting secret input with CryptoJS.enc.Base64.parse(secret) which gets a WordArray, Not sur...
TypeScript is a language that enables writing better code for large and complex projects. Explore What TypeScript is and its types through this blog.
Breaking Changes in v5.0 Version 5.0 of the Node.js driver is not compatible with Node.js v12 or earlier. If you want to use this version of the driver, You must use Node.js v14.20.1 or greater. This release removes support for callbacks in favor of a promise-based API. The followi...
From some perspective, the fact that we get NaN in such cases is okay, but is it? If you can’t get a code of the character of the string, you would like to get an exception signaling the error. But in JavaScript, access to any non-existing element of an array does not lead to...
File metadata that used to be accessible on theGridStoreinstance can be found by querying the bucket. Example constfileMetaDataList:GridFSFile[]=bucket.find({}).toArray(); detailed here. It is no longer required to specifyuseUnifiedTopologyoruseNewUrlParser. ...
I have a dropdown that I would like to serialize and include in an ajax request, but I'm having a hard time getting the selected states of the dropdown. Is there a way to access the contents of x-data from outside the scope of the component?
What is the difference between unknown, void, null and undefined, never in ts? What are generic constraints in ts? Two ways to define an array type Type assertion in ts Generic functions and generic interfaces How to understand as const?