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Command pattern - Revision history
2026-10-23T12:37:40Z
Revision history for this page on the wiki
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http://wiki.karljones.com/index.php?title=Command_pattern&diff=17682&oldid=prev
Karl Jones: /* External links */
2016-09-04T02:48:43Z
<p><span dir="auto"><span class="autocomment">External links</span></span></p>
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Karl Jones
http://wiki.karljones.com/index.php?title=Command_pattern&diff=17679&oldid=prev
Karl Jones at 02:40, 4 September 2016
2016-09-04T02:40:58Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 02:40, 4 September 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== See also ==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== See also ==</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== External links ==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== External links ==</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [] @ Wikipedia.org  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [<ins class="diffchange diffchange-inline">https://en.wikipedia.org/wiki/Command_pattern Command pattern</ins>] @ Wikipedia.org  </div></td></tr>
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Karl Jones
http://wiki.karljones.com/index.php?title=Command_pattern&diff=17678&oldid=prev
Karl Jones: Created page with "In object-oriented programming, the '''command pattern''' is a behavioral design pattern in which an object is used to encapsulate a..."
2016-09-04T02:39:39Z
<p>Created page with "In <a href="/index.php/Object-oriented_programming" title="Object-oriented programming">object-oriented programming</a>, the '''command pattern''' is a <a href="/index.php/Behavioral_pattern" title="Behavioral pattern">behavioral design pattern</a> in which an object is used to <a href="/index.php?title=Data_hiding&action=edit&redlink=1" class="new" title="Data hiding (page does not exist)">encapsulate</a> a..."</p>
<p><b>New page</b></p><div>In [[object-oriented programming]], the '''command pattern''' is a [[Behavioral pattern|behavioral design pattern]] in which an object is used to [[Data hiding|encapsulate]] all information needed to perform an action or trigger an event at a later time.<br />
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This information includes the method name, the object that owns the method and values for the method parameters.<br />
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== Description ==<br />
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Four terms always associated with the command pattern are command, receiver, invoker and client. A command object knows about receiver and invokes a method of the receiver. Values for parameters of the receiver method are stored in the command. The receiver then does the work. An invoker object knows how to execute a command, and optionally does bookkeeping about the command execution. The invoker does not know anything about a concrete command, it knows only about command interface. Both an invoker object and several command objects are held by a client object. The client decides which commands to execute at which points. To execute a command, it passes the command object to the invoker object.<br />
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Using command objects makes it easier to construct general components that need to delegate, sequence or execute method calls at a time of their choosing without the need to know the class of the method or the method parameters. Using an invoker object allows bookkeeping about command executions to be conveniently performed, as well as implementing different modes for commands, which are managed by the invoker object, without the need for the client to be aware of the existence of bookkeeping or modes.<br />
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== See also ==<br />
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== External links ==<br />
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* [] @ Wikipedia.org <br />
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[[Category:Computer science]]<br />
[[Category:Computing]]<br />
[[Category:Software engineering]]</div>
Karl Jones