Simple .NET/ASP.NET PDF document editor web control SDK

#light open System.IO open Microsoft.FSharp.Core.Operators using (File.AppendText("text.txt") ) (fun stream -> stream.WriteLine("Hello World")) This example is slightly bogus because the Microsoft.FSharp.Core.Operators is opened by the compiler by default. I used this because modules designed to be opened directly are a rarity since it s almost always useful for anyone reading the code to know where the function originated. If you open two namespaces that contain modules or classes of the same name, it won t cause a compile error. You can even use values from the modules or classes with the same name, as long as the names of the values are not the same. In Figure 6-1, the namespace System is opened. It contains the class Array, and a module, Array, is also available in F# s libraries. In the figure you can see both static methods from BCL s Array class, all starting with a capital letter, and values from F# s Array module, which start with a small letter.

generate barcode excel macro, barcode excel 2007 freeware, barcode font excel 2010 free download, free barcode font excel 2013, barcode generator excel free, excel2010 microsoft barcode control 9.0, how to barcode in excel 2010, excel barcode font 2010, barcode font for excel 2007, barcode fonts for excel free download,

The search component handles this problem differently. Instead of responding to every keystroke made in the text box, once the user starts typing, an Ajax request is made at predefined intervals to update the results drop-down list, and then the Ajax request is made only if the contents of the text box have changed since the last time a request was issued.

7

It can sometimes be useful to give an alias to a namespace or module to avoid naming clashes. This is useful when two modules share the same name and value with a common name and can also be a convenient way of switching some of your code to use two different implementations of similar modules. It can be more common when using libraries not written in F#. The syntax for this is the module keyword followed by an identifier, then an equals sign, and then the name of the namespace or module to be aliased. The following example defines GColl as the alias for the namespace System.Collections.Generic:

Summary

#light module GColl = System.Collections.Generic let l = new GColl.List<int>()

8

Signature files are a way of making function and value definitions private to a module. You ve already seen the syntax for the definition of a signature file in 2. It is the source that the compiler generates when using the i switch. Any definitions that appear in a signature file are public and can be accessed by anyone using the module. Any that are not in the signature file are private and can be used only inside the module itself. The typical way to create a signature file is to generate it from the module source and then go through and erase any values and functions that you want to be private. The signature file name must be the same as the name of the module with which it is paired. It must have the extension .fsi or .mli. You must specify the signature file to the compiler. On the command line, you must give it directly before the source file for its module. In Visual Studio, the signature file must appear before the source file in Solution Explorer. For example, if you have the following in the file Lib.fs: #light let funkyFunction x = x + ": keep it funky!" let notSoFunkyFunction x = x + 1 and you want to create a library that exposes funkyFunction but not notSoFunkyFunction, you would use the signature code like this: val funkyFunction : string -> string and would use the command line like this: fsc -a Lib.fsi Lib.fs which results in an assembly named Lib.dll with one class named Lib, one public function named funkyFunction, and one private function named notSoFunkyFunction.

Now that we ve shown you how easy Ajax can be, we hope you ll start using these techniques in your applications. In this chapter, we showed you a more involved example that illustrates some of the benefits of Ajax, and we discussed a number of resources you can use to further your understanding. By showing you some common patterns, we hope you ll see some places you can put Ajax to use for yourself, keeping in mind the common gotchas expressed in this chapter. Finally, frameworks such as Taconite can greatly simplify Ajax development work, and we think you ll agree they are worth using.

2N3906 datasheet: http://www.fairchildsemi.com/ds/2N/2N3906.pdf Acroname: http://www.acroname.com/ DN6849SE datasheet: http://www.ortodoxism.ro/datasheets/panasonic/SPC00004CEB.pdf Sharp GP2D12 datasheet: http://document.sharpsma.com/files/GP2D12-DATA-SHEET.PDF