我在 Windows 上安装 Node.js。安装成功,我还在node.js安装程序中选择了安装必要文件(例如chocolatey)的选项。Node安装完成后,打开Powershell;安装一段时间后,出现以下错误:
# A lot of logs before, just an excerpt
Microsoft.VisualStudio.Workload.VCTools Microsoft.VisualStudio.Component.Roslyn.Compiler Microsoft.Component.MSBuild Microsoft.VisualStudio.Component.CoreBuildTools Microsoft.VisualStudio.Component.Windows10SDK Microsoft.VisualStudio.Component.VC.CoreBuildTools Microsoft.VisualStudio.Component.Static.Analysis.Tools Microsoft.VisualStudio.Component.VC.Tools.x86.x64 Microsoft.VisualStudio.Component.VC.Redist.14.Latest Microsoft.VisualStudio.Component.Windows10SDK.17763 Microsoft.VisualStudio.Component.VC.CMake.Project Microsoft.VisualStudio.Component.TestTools.BuildTools
[5330:000f][2021-04-19T18:24:09] Decorating UnelevatedProductModifier with UnelevatedInstallerTelemetryDecorator
[5330:000f][2021-04-19T18:24:09] Created a UnelevatedInstallerTelemetryDecorator
[5330:000e][2021-04-19T18:24:09] Download requested: https://aka.ms/vs/15/release/channel
[5330:001d][2021-04-19T18:24:09] Attempting download 'https://aka.ms/vs/15/release/channel' using engine 'WebClient'
[5330:001d][2021-04-19T18:24:09] WebClient error 'RequestCanceled' with 'https://aka.ms/vs/15/release/channel' - GetWebResponse failed along with a cancellation request
[5330:001d][2021-04-19T18:24:09] Error 0x8013153b: [5330:001d][2021-04-19T18:24:09] Could not update channel "https://aka.ms/vs/15/release/channel"
at System.Threading.CancellationToken.ThrowOperationCanceledException()
at System.Threading.CancellationToken.ThrowIfCancellationRequested()
at Microsoft.VisualStudio.Setup.Download.WebClientEngine.GetWebResponse(Uri uri, DownloadContext downloadContext, DownloadSummary& downloadSummary, HttpWebRequest& …Run Code Online (Sandbox Code Playgroud) switch 语句的典型语法是:
switch(expression) {
case one:
// do something...
break;
case two:
// do something else...
break;
case three:
case four:
// do something special
break;
default:
// if nothing matches...
break;
}
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这种语法看起来非常像 Python(尤其是冒号和人们缩进的方式),与 JavaScript、Java 或 C 等语言的一般语法相反,在这些语言中,大多数语句都使用大括号。有什么具体原因吗?
我希望它看起来应该更像:
switch(expression) {
case (one) {
// do something...
break;
} case (two) {
// do something else...
break;
} case (three) case (four) {
// do something special
break;
} default {
// if nothing matches...
break;
}
}
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我认为我刚刚提供的示例看起来像 …
我尝试了这两个:
plugin: {
label: {
font: {
family: "Lato"
}
}
}
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和这个:
myChart.defaults.global.defaultFontFamily = "Lato";
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将字体系列添加Lato到我的图表中的代码段,但这两种情况都不起作用。
还有更好的建议吗?注意,我使用的版本是3.7.0。提前致谢!
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