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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for August 8th, 2013

.NET/C#: some starting posts on the `yield` keyword.

Posted by jpluimers on 2013/08/08

Peter Leslie Morris asked if Delphi already incorporates the `yield` keyword that C# had introduced in C# 2.

Delphi doesn’t, but for the people interested what it does in C#:

Basically `yield` is syntactic sugar to make it a lot easier to write methods that return enumerators of some sort.

It delays (hence the yield keyword) execution until the enumerator as actually being used.

It is one of the hardest C# things to master (it is the most complicated transformation in the compiler, followed by anonymous methods – well maybe with the exception of async/await), but it can be very useful.

VB.NET doesn’t have it either (thanks André!) has it too, but and also has iterator blocks.

Some start posts on yield:

–jeroen

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Development, Software Development | 10 Comments »

 
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