Before I go on, all the backslashes in this example are changed to percent signs because I cannot get sensible results to display in the posting preview otherwise. Please mentally translate all percent signs henceforth as backslashes. Suppose you have a class you want to test in myclass.
You would like to think that this would work, as you type it line by line: require 'myclass. If you put your test code into test. I hope this reduces the number of prematurely bald people. You are allowed to "use" the same resource multiple times as long as it is imported under a different alias at each invocation. Something that is not immediately obvious, particular with PHP 5. Because imports happen at compile time, there's no polymorphism potential by embedding the use keyword in a conditonal.
For the fifth example example 5 : When in block scope, it is not an illegal use of use keyword, because it is used for sharing things with traits. To clarify the distinction between inserting a trait in a class and importing a trait in a namespace, here is an example where we first import and then insert a trait. That makes your code easier to read. For more information, see the Namespaces section of the C language specification.
Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. NET uses namespaces to organize its many classes, as follows: System.
WriteLine "Hello World! The using keyword can be used so that the complete name isn't required, as in the following example: using System; Console. Important The C templates for. For more information see the article on New C templates generate top level statements The. Tim Tim Motti Motti k 44 44 gold badges silver badges bronze badges. RFV5s it's supposed to indicate that the first namespace eg is in a file called a. The include is defining the existence of the functions. The using is making it easier to use them.
You could avoid using the namespace by writing. James Curran James Curran These keywords are used for different purposes. Vincent Ramdhanie Vincent Ramdhanie David Thornley David Thornley And then you have to do something else to make code be visible anyway, in all three platforms. And in Java you have to ensure the code is on the classpath, e.
Daniel Earwicker Daniel Earwicker k 35 35 gold badges silver badges bronze badges. With include you are just including the header file. JohnIdol JohnIdol One liner not that this is something new : : using std allows you to omit std:: prefix, but you cannot use cout at all without iostream. PolyThinker PolyThinker 5, 19 19 silver badges 21 21 bronze badges.
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