.NET/ASP.NET/C#/VB.NET PDF Document SDK

The File.join method is simple to use, and it allows you to write the same code to run on both systems rather than choosing between backslashes and forward slashes in your code. The separator itself is stored in a constant called File::SEPARATOR, so you can easily turn a filename into an absolute filename (with an absolute path) by appending the directory separator to the start, like so:

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important points that explain how your supervisor will be assured that you will meet your goals: Key Point 1 We accomplished what we said we would. Key Point 2 We are on track to accomplish our new goals. Key Point 3 We will overcome our challenges. As you complete the rest of the story template, you ll cover the Explanation and Detail slides that include the diagrams, charts, screen captures, photos, and anecdotes that back up your appeal for her assurance. Knowing that you have covered the detailed information you need, you can be assured yourself that you can focus on making the important Act I and Key Point slides a solid visual framework to cover the rest of the meaningful information to come.

File.join(File::SEPARATOR , 'full', 'path', 'here', 'filename.txt')

Similarly, you can use File.expand_path to turn basic filenames into complete paths. For example:

The parameters we ve been using until now are called positional parameters because their positions are important more important than their names, in fact. Consider the following two functions: def hello_1(greeting, name): print '%s, %s!' % (greeting, name) def hello_2(name, greeting): print '%s, %s!' % (name, greeting) They both do exactly the same thing, only with their parameter names reversed: >>> hello_1('Hello', 'world') Hello, world! >>> hello_2('Hello', 'world') Hello, world! Sometimes (especially if you have many parameters) the order may be hard to remember. To make things easier, you can supply the name of our parameter: >>> hello_1(greeting='Hello', name='world') Hello, world! The order here doesn t matter at all: >>> hello_1(name='world', greeting='Hello') Hello, world! The names do, however (as you may have gathered): >>> hello_2(greeting='Hello', name='world') world, Hello!

File.expand_path("text.txt")

If your story template and storyboard sketches call for a verbal motif of clockwork (and that motif is a match with your supervisor), a search for gears in iStockphoto produces the photo in Figure 9-24, which will serve as the visual motif for several of the Act I and Key Point slides.

under. As text.txt is a relative filename, it converts it to an absolute filename and references the current working directory.

Seeking In a previous example you changed the position of the file pointer using pos=. However, this only allows you to specify the exact position of the file pointer. If you want to move

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The parameters that are supplied with a name like this are called keyword parameters. On their own, the key strength of keyword parameters is that they can help clarify the role of each parameter. Instead of having to use some odd and mysterious call like >>> store('Mr. Brainsample', 10, 20, 13, 5) you could use >>> store(patient='Mr. Brainsample', hour=10, minute=20, day=13, month=5) Even though it takes a bit more typing, it is absolutely clear what each parameter does. Also, if you get the order mixed up, it doesn t matter. What really makes keyword arguments rock, however, is that you can give the parameters in the function default values: def hello_3(greeting='Hello', name='world'): print '%s, %s!' % (greeting, name) When a parameter has a default value like this, you don t have to supply it when you call the function! You can supply none, some, or all, as the situation might dictate: >>> hello_3() Hello, world! >>> hello_3('Greetings') Greetings, world! >>> hello_3('Greetings', 'universe') Greetings, universe! As you can see, this works well with positional parameters, except that you have to supply the greeting if you want to supply the name. What if you want to supply only the name, leaving the default value for the greeting I m sure you ve guessed it by now: >>> hello_3(name='Gumby') Hello, Gumby! Pretty nifty, huh And that s not all. You can combine positional and keyword parameters. The only requirement is that all the positional parameters come first. If they don t, the interpreter won t know which ones they are (that is, which position they are supposed to have).