Difference between revisions of "Keyboard macros"

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(An ISO Certification)
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{{Manual|emacs|Basic-Keyboard-Macro|Basic Keyboard Macro}}
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ISO Certification Consultants, ISO Certification Consultants Dubai uae Abu Dhabi, ISO 9001, ISO 27001, ISO 20000, ISO 14001, OHSAS 18001,ISO 17025, HACCP, ISO 22000, ISO 50001, EnMS, ISO Training Services, Management System Certification, ISO Consultant Dubai, ISO Certification Services in Dubai, ISO Consultants in Abu Dhabi, ISO Consultants in UAE, ISO 9001 Certification in Dubai, ISO Certification in Abu Dhabi, ISO Training Dubai, ISO 9001 Consultants in UAE, ISO 50001 Consultants in UAE, ISO 27001 Consultants in UAE, ISO 20000 Consultants in Dubai, ISO 22301 Certification in Dubai, ISO Certification Consultants in UAE, ISO 17025 Consultants UAE
 
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'''Keyboard macros''' can be used to automate or repeat tedious editing tasks in Emacs.
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==Basic Use==
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; {{Keys|F3}}, or {{Keys|C-x (}}
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: Start defining a macro.
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; {{Keys|F4}}, or {{Keys|C-x )}}
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: Stop defining a macro.
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; {{Keys|F4}}, or {{Keys|C-x e}}
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: Execute a macro
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; {{Keys|C-u 37 C-x e}} or {{Keys|C-u 37 F4}}
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: Execute a macro multiple times, using [[prefix argument]]
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; {{Keys|C-u 0 C-x e}}
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: Execute a macro until the end of the buffer
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==Example usage==
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Consider the standard <code>*scratch*</code> buffer:
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<pre>
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;; This buffer is for notes you don't want to save, and for Lisp evaluation.
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;; If you want to create a file, visit that file with C-x C-f,
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;; then enter the text in that file's own buffer.
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</pre>
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Suppose you want to remove the first occurrence of the letter "a" on every row in that piece of text. You could write a [[regular expression]] to do the job, but let's assume you want to use a keyboard macro this time.
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# Make sure [[point]] is at the start of the buffer.
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# Hit <code>C-x (</code> to start recording your macro. '''Note:''' If you hit <code>C-g</code> or if an error occurs, your keyboard macro recording will stop.
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# Hit <code>C-s</code> followed by <code>a</code> to find the first "a". Now, point is right after the first "a" in the text.
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# Hit backspace to delete that "a".
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The first occurrence of "a" of the first line has been deleted. Let's move point to the beginning of the next line and then stop recording.
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<ol start="5">
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<li>Hit <code>C-e C-f</code> to move point to the beginning of the next line.</li>
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<li>Hit <code>C-x )</code> to finish the recording of our macro.</li>
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</ol>
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The macro you have just recorded performs the operation of removing the first occurrence of "a" it can find and then moving point to the next line.
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<ol start="7">
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<li>Hit <code>C-x e</code> once to call that macro.</li>
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<li>Continue hitting <code>e</code> to call it several times. Hit any other key to get out of the macro repetition.</li>
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</ol>
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==Saving macros==
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{{Manual|emacs|Save-Keyboard-Macro|Save Keyboard Macro}}
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===Binding to a key===
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To bind a keyboard macro to a key use <code>C-x C-k b</code>.  To avoid problems caused by overriding existing bindings, the key sequences <code>C-x C-k 0</code> through <code>C-x C-k 9</code> and <code>C-x C-k A</code> through <code>C-x C-k Z</code> are reserved for your own keyboard macro bindings.  You can, however, bind a keyboard macro to whatever you like.
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==Variables==
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Variables can be stored in lisp or in [[registers]]. Here's an example using lisp:
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<pre>
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[M-: (setq x 1)]
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<F3>
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Line number [C-u M-: x]
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[M-: (setq x (+ x 1))]
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<F4>
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</pre>
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Now execute the macro four times with the command <code>C-x e e e e</code> and you get:
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line number 1<br />
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line number 2<br />
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line number 3<br />
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line number 4
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Revision as of 00:09, 4 February 2014

ISO Certification Consultants, ISO Certification Consultants Dubai uae Abu Dhabi, ISO 9001, ISO 27001, ISO 20000, ISO 14001, OHSAS 18001,ISO 17025, HACCP, ISO 22000, ISO 50001, EnMS, ISO Training Services, Management System Certification, ISO Consultant Dubai, ISO Certification Services in Dubai, ISO Consultants in Abu Dhabi, ISO Consultants in UAE, ISO 9001 Certification in Dubai, ISO Certification in Abu Dhabi, ISO Training Dubai, ISO 9001 Consultants in UAE, ISO 50001 Consultants in UAE, ISO 27001 Consultants in UAE, ISO 20000 Consultants in Dubai, ISO 22301 Certification in Dubai, ISO Certification Consultants in UAE, ISO 17025 Consultants UAE

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