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Allows you to retrieve or set attributes using a combination of values from the FileAttributes enumeration. Allows you to set or retrieve the creation time, last-access time, and lastwrite time using a DateTime object. Allows you to set or retrieve the creation time, last-access time, and lastwrite time using a DateTime object. Returns True or False depending on whether the file or directory exists. In other words, you can create FileInfo and DirectoryInfo objects that don t actually correspond to current physical directories, although you obviously won t be able to use properties such as CreationTime and methods such as MoveTo(). Returns a string that represents the fully qualified name, the directory or file name (with extension), or the extension on its own, depending on which property you use. Removes the file or directory, if it exists. When deleting a directory, it must be empty, or you must specify an optional parameter set to True. Updates the object so it s synchronized with any file system changes that have happened in the meantime (for example, if an attribute was changed manually using Windows Explorer). Creates the specified directory or file. Copies the directory and its contents or the file. For a DirectoryInfo object, you need to specify the new path; for a FileInfo object, you specify a path and file name.

FullName, Name, and Extension Delete() Refresh()

Create() MoveTo()

Remember that the idea behind components is to share code for cross-controller functions that are portable. In theory, you should be able to distribute any component, and it should work for any Cake application regardless of how the application is designed. If the code does not fit in the CakePHP framework, or an MVC model, then you ought to create vendor files and not components. By adhering to this standard, you ensure that other Cake developers can benefit from your work, and vice versa. Like helpers, components are designed to cut down on superfluous code in the controller. When the controller begins to look more bloated than the model, you will generally want to find ways to move more code to the model. When code is shared across multiple controllers, you may want to consider placing that logic in a component and scaling the code to be more portable than in one specific controller or Cake application. In the long run, your site will be better organized, cleaner, and lighter always good reasons for taking the extra step.

In addition, the FileInfo and DirectoryInfo classes have a few unique members, as indicated in Table 18-5 and Table 18-6.

The Math Problems worksheet consists of two parts. The upper part of the worksheet is used to calculate a cube s length, width, height, and volume. The lower part of the worksheet is used to calculate an object s time, speed, and distance traveled.

Parent and Root CreateSubdirectory()

Returns a DirectoryInfo object that represents the parent or root directory. Creates a directory with the specified name in the directory represented by the DirectoryInfo object. It also returns a new DirectoryInfo object that represents the subdirectory.

Summary

GetDirectories() GetFiles()

Returns an array of DirectoryInfo objects that represent all the subdirectories contained in this directory. Returns an array of FileInfo objects that represent all the files contained in this directory.

Directory DirectoryName Length CopyTo()

Components extend the controller like helpers extend the view. They provide a set of functions and methods that are specific to a certain overall scheme to the controller and are designed with portability in mind. In other words, if you ve built your components right, you should be able to distribute them for use in any Cake application. In this chapter, I discussed how to include a component class in the controller and how to put its functions to work. You wrote some user authentication methods into your blog application using the Auth component to better secure areas of the site and limit access to the general user. This chapter also explained how to work Cake s utility classes into your application. Many of these classes condense the time and code involved to perform some typical web-related tasks such as reading and writing files and folders. I outlined some other utility classes, and I discussed some important differences between vendor files, utilities, and components. In 12, I ll go into more detail about vendors and how to use them in your Cake project.

Returns a DirectoryInfo object that represents the parent directory. Returns a string that identifies the name of the parent directory. Returns a Long (64-bit integer) with the file size in bytes. Copies a file to the new path and file name specified as a parameter. It also returns a new FileInfo object that represents the new (copied) file. You can supply an optional additional parameter of True to allow overwriting.