Professional F# 2.0 by Ted Neward

By Ted Neward

This is a e-book at the F# programming language.

On the outside of items, that's an intuitively noticeable assertion, given the name of this e-book. despite the fact that, regardless of the plain redundancy in announcing it aloud, the sentence above elegantly describes what this ebook is set: The authors are usually not trying to train builders how one can accomplish initiatives from different languages during this one, nor are they trying to evangelize the language or its characteristic set or its use "over" different languages. They think that you're contemplating this ebook since you be interested in studying the F# language: its syntax, its semantics, its execs and cons, and its use in live performance with different components of the .NET ecosystem.

The meant reader is a .NET developer, acquainted with at the very least one of many programming languages within the .NET environment. That language may be C# or visible uncomplicated, or even C++/CLI, IronPython or IronRuby.

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DivideByZeroException. S. budget or the royalty checks for programming language book authors. ) Numeric Types x 39 The nativeint and unativeint types are typically used only for interoperability with native code that receives and produces machine word-sized values, that is, pointers. They are rarely, if ever, used for arithmetic purposes. Operators module also defi nes a number of mathematical operations, listed here, which behave as their names imply. ) ‰ abs ‰ cos ‰ sin ‰ tan ‰ cosh ‰ sinh ‰ tanh ‰ acos ‰ asin ‰ atan ‰ ceil ‰ floor ‰ truncate ‰ exp ‰ log ‰ log10 ‰ ** This is not an exhaustive list, but a representative sample of the operators found in that namespace.

Fortunately these disappear quickly as the new F# developer gains experience with the language. 3 Primitive Types WHAT’S IN THIS CHAPTER? ‰ Understanding primitive types ‰ Declaring primitive type instances ‰ Applying operators Like all languages that run on top of the CLR, the F# language provides a core set of primitive types that offer basic integer and floating-point arithmetic capabilities, character string support, Boolean types, and so on. Int32, and so on), as described next, but a few types are new to F# and come from the F# libraries.

Functionality can now be x 21 22 x CHAPTER 1 PRIMER written in small chunks, even as small as simple operations and then composed together, such as what might be needed for input validation code for a web application. However, making this work in a syntax that doesn’t drive the average C# developer insane (if it hasn’t already) is difficult, which leads to the next question — what if we could somehow make the syntax cleaner and easier to read and understand? TYPE INFERENCE One thing is apparent from all this, particularly the defi nition of the Curry method: This is heavily genericized code, and it’s not easy to read.

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