Wednesday, March 05, 2014

Today's Shiny... C# Pad, web based C# REPL environment

Sunny Ahuwanya's Blog - Introducing C# Pad

I’m excited to present C# Pad, an interactive web based C# REPL.

Have you ever wanted to quickly evaluate an expression or test some code, like say try out different DateTime string formats or test a method or clear up some confusion (like what’s the difference between Uri.EscapeDataString and Uri.EscapeUriString or what new Random().Next(0) returns), or decode some string in Base64 or some other format?

C# Pad lets you easily do all those things and a whole lot more.

Interactive REPL

Do you see the embedded code pad below? Go ahead and hit the Go button.

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That’s because C# Pad is a REPL. Objects in previous submissions are visible and accessible from the current one.
( Did you also notice the cool code completion? :) )

You don’t need to call Console.WriteLine to display results. Simply type the variable name (without a semicolon) in the last line of a code submission and the string representation of the variable’s value will be displayed. 
For example, type greeting in the same code pad and hit Go to see its value.

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You can use C# Pad to write complex code, define classes and methods and evaluate all kinds of expressions ranging from simple mathematical expressions like 60 * 60 * 24 or Math.Sin((30 * Math.PI)/ 180) to LINQ expressions.

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C# Everywhere

You can embed interactive code pads in your blog, website or any site you can edit, just like I have in this blog post. You can even select a theme that matches your site.
Yes, this means you can now create a C# playground anywhere. Simply visit csharppad.com, compose the code you’d like to embed, click the embed button and follow the instructions. 

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You can also load and save Github Gists.
To load a Gist, open csharppad.com/gist/_gist_owner_/_gist_id or simply csharppad.com/gist/_gist_id

As examples, the links below open up Gists in C# Pad.

http://csharppad.com/gist/9220821
http://csharppad.com/gist/octocat/1169852 ( Did you know The Octocat codes in C#? )

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Numerical Analysis

The awesome Math.Net Numerics library is bundled with C# Pad, which makes working on complex math and statistics problems a breeze.

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C# Pad is the first and only (as of this writing) web based interactive C# REPL, with code completion, diagnostics, themes, embeddability, timing information, Gist support and more features to come.

I hope you find C# Pad useful and delightful. Drop me a line or use the help link on the site to provide feedback on feature suggestions, bug reports and other kinds of feedback

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C# Pad

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Now that's pretty damn cool... Editing code is a little bit of a pain, as code seems to be highlighted often (so keying replaces the highlighted block), and tab doesn't selected the intellisense like hints, but this is still some awesome coding... :)

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