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How would one use c# async features to simulate js-style callbacks? (see: node.js fs API )

Imagine I have the following C# method:

async Task<string> ReadFileAsync(string path)
{
  return await DoWhatever(path);
}

How would I register a js function which takes a string and a callback as arguments and calls it asynchronously?

I pulled the source (master), and tried a rebuild, no joy, I expect I need to tweak something, at least to point to the version of Chakra I already built, I notice there are no System references in the Microsoft.Scripting project, should I be adding them by hand?

Here is a sampling of the errors I get

Severity Code Description Project File Line Source Suppression State
Error CS0246 The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) Microsoft.Scripting C:\Users\aphilpotts\AppData\Local\Temp.NETPortable,Version=v5.0.AssemblyAttributes.cs 2 IntelliSense Active
Error CS0246 The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) Microsoft.Scripting C:\Users\aphilpotts\AppData\Local\Temp.NETPortable,Version=v5.0.AssemblyAttributes.cs 3 IntelliSense Active
Error CS0400 The type or namespace name 'System' could not be found in the global namespace (are you missing an assembly reference?) Microsoft.Scripting C:\Users\aphilpotts\AppData\Local\Temp.NETPortable,Version=v5.0.AssemblyAttributes.cs 4 IntelliSense Active
Error CS0518 Predefined type 'System.String' is not defined or imported Microsoft.Scripting C:\Users\aphilpotts\AppData\Local\Temp.NETPortable,Version=v5.0.AssemblyAttributes.cs 4 IntelliSense Active

Dear Rob

it would be very nice to see, which branch including but not limited to HostObjectBridgeV2.1, HostObjectBridgeV2 and master has which production status. As there is apparently no more work in progress, I'd like to think that all branches are final. But: which branch is the recommended one to use, or are there newer, alternative .net bindings for ChakraCore so that you stoped working on this project?

May I kindly ask you, to provide some guidance in the respective readme.md_s? That would be very helpful.

Martin

Hi,
im working on chakracore. i wanna use external javascript library like underscore.js, math.js etc.
How can i do it?

Example:

var underscore = ReadFromFile(underscore.js); var fn = engine.EvaluateScriptText(underscore); var fn = engine.EvaluateScriptText(@"var numberList = [1,2,4,20,80,12,42];" "var result = _.shuffle(numberList);" "result[0];");

_.shuffle is an underscore.js function.

Can this be done through jsrt-dotnet?
http://stackoverflow.com/questions/35390441/embedding-chakrahost-c-for-webgl-example

严重性 代码 说明 项目 文件 行 禁止显示状态
错误 CS1061 “Type”未包含“IsValueType”的定义，并且找不到可接受第一个“Type”类型参数的可访问扩展方法“IsValueType”(是否缺少 using 指令或程序集引用?) Microsoft.Scripting C:\Users\Liuzhenhua\Source\Repos\jsrt-dotnet\src\Microsoft.Scripting\JavaScript\JavaScriptConverter.cs 255 活动