Ironruby core - Nov 2009 - Could you please teach a canonical style for writing the IronRuby hosting code.

Hello, I''m kenichi hashimoto.
I''m a Japanese. I don''t write english well.

Now I have a question about a canonical style for writing the IronRuby
hosting code.

[BACKGROUND]
Now, I''m tring to host the IronRuby 1.0RC on C#.NET (Visual Studio
2008).
And, I have been trying to host it since IronRuby 0.5.
However, I haven''t understood about how to write code in right style
yet.

[QUESTION]
Could you please teach a canonical style for writing the IronRuby hosting code.

Now, I wrote below:

    static void Main(string[] args)
    {
        // create the IronRuby engine.
        ScriptRuntime runtime = IronRuby.Ruby.CreateRuntime();
        var engine = runtime.GetEngine("rb");

        // create the scope and set the local variable from C#
        var scope = engine.CreateScope();
        scope.SetVariable("x", 123);

        // set the global variable from C#
       
IronRuby.Ruby.GetExecutionContext(engine).DefineGlobalVariable("xxx",
789);

        // execute the script with the scope
        var source = engine.CreateScriptSourceFromString(@"puts
""x is
#{x}. $xxx is #{$xxx}."" ");
        source.Execute(scope);

        Console.ReadLine();
    }

Is it a canonical style?

Thank you.
B.R. Kenichi HASHIMOTO

That looks good for hosting code that can switch between languages  
easily. If you''re just using Ruby, you can use  
IronRuby.Ruby.CreateEngine() instead of getting the engine by string,  
but I''d suggest staying with what you have; you can change to other  
languages easily.

For running code from strings, you don''t necessarily need to create a  
ScriptSource; you can use engine.Execute(string, ScriptScope) instead.  
Creating a script source are for the cases where you want to compile  
the code and store it before executing, or you want to change the mode  
of source code execution (file, interactive, expressions, etc).

There is a dlr hosting spec on dlr.codeplex.com that shows various  
hosting scenarios and how the code should look.

Let us know if you have any other questions about hosting. I showed  
hosting at RubyConf this year, so keep an eye out for that blog post  
(I''ll send mail to this list when it''s done).

~Jimmy
Sent from my phone

On Nov 29, 2009, at 9:11 AM, "????????"  
<ken1hasimoto at gmail.com> wrote:
> Hello, I''m kenichi hashimoto.
> I''m a Japanese. I don''t write english well.
>
> Now I have a question about a canonical style for writing the IronRuby
> hosting code.
>
> [BACKGROUND]
> Now, I''m tring to host the IronRuby 1.0RC on C#.NET (Visual Studio
> 2008).
> And, I have been trying to host it since IronRuby 0.5.
> However, I haven''t understood about how to write code in right
style
> yet.
>
> [QUESTION]
> Could you please teach a canonical style for writing the IronRuby  
> hosting code.
>
> Now, I wrote below:
>
>    static void Main(string[] args)
>    {
>        // create the IronRuby engine.
>        ScriptRuntime runtime = IronRuby.Ruby.CreateRuntime();
>        var engine = runtime.GetEngine("rb");
>
>        // create the scope and set the local variable from C#
>        var scope = engine.CreateScope();
>        scope.SetVariable("x", 123);
>
>        // set the global variable from C#
>        IronRuby.Ruby.GetExecutionContext(engine).DefineGlobalVariable 
> ("xxx",
> 789);
>
>        // execute the script with the scope
>        var source = engine.CreateScriptSourceFromString(@"puts
""x is
> #{x}. $xxx is #{$xxx}."" ");
>        source.Execute(scope);
>
>        Console.ReadLine();
>    }
>
> Is it a canonical style?
>
> Thank you.
> B.R. Kenichi HASHIMOTO
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>

Hello Jimmy-sann

Thank you for your some advice about my code,
and for giving me an information about the link to documentation of DLR-hosting.

I understood your advices as below:

1. for creating the engine.
If the program hosts the ONLY IronRuby,
''IronRuby.Ruby.CreateEngine()''
is better than ''runtime.GetEngine("rb");''.
If the program needs to host many dynamic languages, ''var engine
ScriptRuntime.CreateFromConfiguration().GetEngine("rb");'' is
better
than ''IronRuby.Ruby.CreateEngine()''.

2. ScriptSource
If the program evaluates same script and never execute same script,
''engine.Execute(string, ScriptScope)'' is better than for
creating the
ScriptSource.
Because, engine.Execute(string, ScriptScope) is simple code.

If the program evaluates one script many times, for creating the
ScriptSource is better than ''engine.Execute(string,
ScriptScope)''.
Because creating a ScriptSource compiles a ruby code ONLY once time
and reduces .
Of course, when creating a ScriptSource, I can change the mode for
complie,execution.

---------

Now, I have one more question about  global variables.
First, in my last mail, I used
''IronRuby.Ruby.GetExecutionContext(engine).DefineGlobalVariable''
for
defining  global variable.
Now I found the way to write
''runtime.Globals.SetVariable("xxx",
567);'' to define  global variable in the documentaion , but it seems
NOT work.
Is this a bug?

Thank you.
B.R. Kenichi HASHIMOTO



2009/11/30 Jimmy Schementi <Jimmy.Schementi at
microsoft.com>:
> That looks good for hosting code that can switch between languages
> easily. If you''re just using Ruby, you can use
> IronRuby.Ruby.CreateEngine() instead of getting the engine by string,
> but I''d suggest staying with what you have; you can change to
other
> languages easily.
>
> For running code from strings, you don''t necessarily need to
create a
> ScriptSource; you can use engine.Execute(string, ScriptScope) instead.
> Creating a script source are for the cases where you want to compile
> the code and store it before executing, or you want to change the mode
> of source code execution (file, interactive, expressions, etc).
>
> There is a dlr hosting spec on dlr.codeplex.com that shows various
> hosting scenarios and how the code should look.
>
> Let us know if you have any other questions about hosting. I showed
> hosting at RubyConf this year, so keep an eye out for that blog post
> (I''ll send mail to this list when it''s done).
>
> ~Jimmy
> Sent from my phone
>
> On Nov 29, 2009, at 9:11 AM, "????????"
> <ken1hasimoto at gmail.com> wrote:
>
>> Hello, I''m kenichi hashimoto.
>> I''m a Japanese. I don''t write english well.
>>
>> Now I have a question about a canonical style for writing the IronRuby
>> hosting code.
>>
>> [BACKGROUND]
>> Now, I''m tring to host the IronRuby 1.0RC on C#.NET (Visual
Studio
>> 2008).
>> And, I have been trying to host it since IronRuby 0.5.
>> However, I haven''t understood about how to write code in right
style
>> yet.
>>
>> [QUESTION]
>> Could you please teach a canonical style for writing the IronRuby
>> hosting code.
>>
>> Now, I wrote below:
>>
>>    static void Main(string[] args)
>>    {
>>        // create the IronRuby engine.
>>        ScriptRuntime runtime = IronRuby.Ruby.CreateRuntime();
>>        var engine = runtime.GetEngine("rb");
>>
>>        // create the scope and set the local variable from C#
>>        var scope = engine.CreateScope();
>>        scope.SetVariable("x", 123);
>>
>>        // set the global variable from C#
>>        IronRuby.Ruby.GetExecutionContext(engine).DefineGlobalVariable
>> ("xxx",
>> 789);
>>
>>        // execute the script with the scope
>>        var source = engine.CreateScriptSourceFromString(@"puts
""x is
>> #{x}. $xxx is #{$xxx}."" ");
>>        source.Execute(scope);
>>
>>        Console.ReadLine();
>>    }
>>
>> Is it a canonical style?
>>
>> Thank you.
>> B.R. Kenichi HASHIMOTO
>> _______________________________________________
>> Ironruby-core mailing list
>> Ironruby-core at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/ironruby-core
>>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>

Runtime.Globals.SetVariable(''C'', ...) sets a global constant
C, not a Ruby global variable $C.

Tomas

-----Original Message-----
From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of ????????
Sent: Tuesday, December 01, 2009 6:43 AM
To: ironruby-core
Subject: Re: [Ironruby-core] Could you please teach a canonical style for
writing the IronRuby hosting code.

Hello Jimmy-sann

Thank you for your some advice about my code, and for giving me an information
about the link to documentation of DLR-hosting.

I understood your advices as below:

1. for creating the engine.
If the program hosts the ONLY IronRuby,
''IronRuby.Ruby.CreateEngine()''
is better than ''runtime.GetEngine("rb");''.
If the program needs to host many dynamic languages, ''var engine =
ScriptRuntime.CreateFromConfiguration().GetEngine("rb");'' is
better than ''IronRuby.Ruby.CreateEngine()''.

2. ScriptSource
If the program evaluates same script and never execute same script,
''engine.Execute(string, ScriptScope)'' is better than for
creating the ScriptSource.
Because, engine.Execute(string, ScriptScope) is simple code.

If the program evaluates one script many times, for creating the ScriptSource is
better than ''engine.Execute(string, ScriptScope)''.
Because creating a ScriptSource compiles a ruby code ONLY once time and reduces
.
Of course, when creating a ScriptSource, I can change the mode for
complie,execution.

---------

Now, I have one more question about  global variables.
First, in my last mail, I used
''IronRuby.Ruby.GetExecutionContext(engine).DefineGlobalVariable''
for defining  global variable.
Now I found the way to write
''runtime.Globals.SetVariable("xxx",
567);'' to define  global variable in the documentaion , but it seems
NOT work.
Is this a bug?

Thank you.
B.R. Kenichi HASHIMOTO



2009/11/30 Jimmy Schementi <Jimmy.Schementi at
microsoft.com>:
> That looks good for hosting code that can switch between languages 
> easily. If you''re just using Ruby, you can use
> IronRuby.Ruby.CreateEngine() instead of getting the engine by string, 
> but I''d suggest staying with what you have; you can change to
other
> languages easily.
>
> For running code from strings, you don''t necessarily need to
create a
> ScriptSource; you can use engine.Execute(string, ScriptScope) instead.
> Creating a script source are for the cases where you want to compile 
> the code and store it before executing, or you want to change the mode 
> of source code execution (file, interactive, expressions, etc).
>
> There is a dlr hosting spec on dlr.codeplex.com that shows various 
> hosting scenarios and how the code should look.
>
> Let us know if you have any other questions about hosting. I showed 
> hosting at RubyConf this year, so keep an eye out for that blog post 
> (I''ll send mail to this list when it''s done).
>
> ~Jimmy
> Sent from my phone
>
> On Nov 29, 2009, at 9:11 AM, "????????"
> <ken1hasimoto at gmail.com> wrote:
>
>> Hello, I''m kenichi hashimoto.
>> I''m a Japanese. I don''t write english well.
>>
>> Now I have a question about a canonical style for writing the 
>> IronRuby hosting code.
>>
>> [BACKGROUND]
>> Now, I''m tring to host the IronRuby 1.0RC on C#.NET (Visual
Studio
>> 2008).
>> And, I have been trying to host it since IronRuby 0.5.
>> However, I haven''t understood about how to write code in right
style
>> yet.
>>
>> [QUESTION]
>> Could you please teach a canonical style for writing the IronRuby 
>> hosting code.
>>
>> Now, I wrote below:
>>
>>    static void Main(string[] args)
>>    {
>>        // create the IronRuby engine.
>>        ScriptRuntime runtime = IronRuby.Ruby.CreateRuntime();
>>        var engine = runtime.GetEngine("rb");
>>
>>        // create the scope and set the local variable from C#
>>        var scope = engine.CreateScope();
>>        scope.SetVariable("x", 123);
>>
>>        // set the global variable from C#
>>        IronRuby.Ruby.GetExecutionContext(engine).DefineGlobalVariable
>> ("xxx",
>> 789);
>>
>>        // execute the script with the scope
>>        var source = engine.CreateScriptSourceFromString(@"puts
""x is
>> #{x}. $xxx is #{$xxx}."" ");
>>        source.Execute(scope);
>>
>>        Console.ReadLine();
>>    }
>>
>> Is it a canonical style?
>>
>> Thank you.
>> B.R. Kenichi HASHIMOTO
>> _______________________________________________
>> Ironruby-core mailing list
>> Ironruby-core at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/ironruby-core
>>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Ironruby-core at rubyforge.org
http://rubyforge.org/mailman/listinfo/ironruby-core