代码语言:javascript 代码运行次数:0 运行 AI代码解释 //weakmap.jsfunctionusageSize(){constused=process.memoryUsage().heapUsed;returnMath.round(used/1024/1024*100)/100+'M';}global.gc();console.log(usageSize());// ≈ 3.23Mletarr=newArray(5*1024*1024);constmap=newWeakMap();map.set(arr,1...
精读《What's new in javascript》 1. 引言 本周精读的内容是:Google I/O 19。 2019 年 Google I/O 介绍了一些激动人心的 JS 新特性,这些特性有些已经被主流浏览器实现,并支持 polyfill,有些还在草案阶段。 我们可以看到 JS 语言正变得越来越严谨,不同规范间也逐渐完成了闭环,而且在不断吸纳其他语言的优秀...
JavaScript 1.8 is part of Gecko 1.9 (which is incorporated into Firefox 3). Array extras There are two new iterative Array methods included in JavaScript 1.8, specifically: •reduce()- runs a function on every item in the array and collects the results from previous calls. if (!Array.prot...
ButtonStyle.xaml 代码语言:javascript 代码运行次数:0 运行 AI代码解释 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:sv="clr-namespace:WindowHelper"><!--标题按钮样式--><Style x:Key="CaptionButtonS...
共享内存。setTimeout等异步,是取现在当时的a的值。执行第一个setTimeout的时候,a=3,已经执行了。 二、全局变量和new变成全局的 varfoo=10;vara=1;varmain =function(){//a=10;console.log(a); a=20; console.log(this.foo);this.foo=foo; ...
When connecting to MongoDB Server version 6.0 or later, the driver prioritizes electionId settings before setVersion settings during Server Discovery and Monitoring events. In previous versions, the prioritization order was reversed. Changes to AWS Authentication When you install the optional aws-sdk...
Onboard your add-in to the next generation of Excel experiences with data types and reduce your time to market by reaping the benefits of our deeply integrated feature set. Excel data types More than just text and numbers Countless solutions have been built with Excel. Many of these solutions...
To allow JavaScript/TypeScript projects to also be easily debugged using Visual Studio Code, we’ve included a launch.json file to the project template. This file will be used to set your launch configurations in Visual Studio, as well as in VS Code. As a result, you will be able to ...
Getting started for game development Interested in developing games for Windows 10? The new Getting started for game development page gives you a full overview of what you need to do to get yourself set up, registered, and ready to submit your apps and games. Graphics adapters The following ...
//weakmap.jsfunctionusageSize(){constused=process.memoryUsage().heapUsed;returnMath.round(used/1024/1024*100)/100+'M';}global.gc();console.log(usageSize());// ≈ 3.23Mletarr=newArray(5*1024*1024);constmap=newWeakMap();map.set(arr,1);global.gc();console.log(usageSize());// ≈...