For example, constant folding and simple flow analysis shows that the inside of the if-statement in the following code is unreachable: int n = 2 + 1 ; if ( n == 4 ) { // unreachable } However, a great deal more sophistication is needed to work out that the corresponding block is unreachable in the following code:

If this file does not exist, web robots assume that the website owner does not wish to place any limitations on crawling the entire site

Principle of a shadow and a shadow map [ edit ] If you looked out from a source of light, all the objects you can see would appear in light

A user's client provides presence information (presence state) via a network connection to a presence service , which is stored in what constitutes their personal availability record (called a presentity ) and can be made available for distribution to other users (called watchers ) to convey their availability for

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Counting the number of links to a page can give us a general estimate of its prominence on the Web, but a page with very few incoming links may also be prominent, if two of these links come from the home pages of sites like Yahoo

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[ 6 ] Later work on feature-toggle structure similarly noted that toggles may increase code complexity, introduce dead code, and reduce maintainability if they are not removed or organized after their purpose has ended

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In the mail client example, the framework could follow both the keyboard and mouse inputs and call the command invoked by the user by either means and at the same time monitor the network interface to find out if new messages arrive and refresh the screen when some network activity is detected

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Continuing with the foregoing example, if there is a change to the report compilation process, there is a greater danger that the printing code will break if it is part of the same class

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The same is true if the same file, even with the same name, is stored in more than one location in the directory hierarchy

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An interpreter follows the program, assuming symbolic values for inputs rather than obtaining actual inputs as normal execution of the program would

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The Web portal gained special attention because it was, for many users, the starting point of their Web browsing if it was set as their home page

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