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Cuchulainn
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User feedback Mr. sitmo's prng

December 24th, 2013, 10:15 am

QuoteOriginally posted by: outrunQuoteOriginally posted by: CuchulainnQuoteI don't get the delegate:See the example again Mon Dec 23, 13 08:36 PMI see.RngDelegate rand = prng.NextDouble;is likestd::function rand = enginine.operator();I though that rand was a float (the return type of the NextDouble member function), but you're passing an engine to BoxMullerII.Nice!There are two issues that are confusing (there are two 'levels'):1. Server code e.g. the Box-Muller that contains a delegate type [std::function rand = engine.operator();]2. Clienct code that must assign the delegate type to a target method [RngDelegate rand = prng.NextDouble;]So the two C++ and C# are exactly the same but numerics in .NET with generic types is a non-starter. So I use double.
Last edited by Cuchulainn on December 23rd, 2013, 11:00 pm, edited 1 time in total.
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Cuchulainn
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User feedback Mr. sitmo's prng

December 24th, 2013, 10:21 am

Indeed Bingo!Here is another example in the same sphere to emulate STL algos in C# and the delegate idea againpublic delegate bool Condition<T> (T value); // ~ std::function() declaration
Last edited by Cuchulainn on December 23rd, 2013, 11:00 pm, edited 1 time in total.
http://www.datasimfinancial.com
http://www.datasim.nl

Approach your problem from the right end and begin with the answers. Then one day, perhaps you will find the final question..
R. van Gulik
 
User avatar
Cuchulainn
Topic Author
Posts: 60457
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
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User feedback Mr. sitmo's prng

December 24th, 2013, 10:35 am

QuoteOriginally posted by: outrunah,.. I now see this at the toppublic delegate double RngDelegate();*that's* the generic bitIndeed. And you call it as a function ... As with std::function, all that matters for compatibility is function signature, i.e. input args return type // BTW there is no STL-like stuff in C# (some LINQ but that's another ball game)
Last edited by Cuchulainn on December 23rd, 2013, 11:00 pm, edited 1 time in total.
http://www.datasimfinancial.com
http://www.datasim.nl

Approach your problem from the right end and begin with the answers. Then one day, perhaps you will find the final question..
R. van Gulik
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