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How to discover (standard) function names?

how often is the official Emacs manual updated?How to get the function help without typing?How to look up documentation for a minor mode?How to quote symbols in a documentation string?how to find non-interactive function equivalents of elisp interactive functionsHow go to Emacs lisp source function from my custom elisp file?How do you navigate documentation in Emacs?Navigation to source of compiled lisp function?

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2

When programing emacs (or common) lisp, how to discover (standard) function names (using emacs and working offline)?

Example: Let's say you want to shift bits of an integer, but you don't now the name of the function, which can do this (hint: the name is ash, but you don't know, yet).
apropos isn't helping you, because it does not list ash when asking for shift.

help documentation apropos

share|improve this question

edited 8 hours ago

Drew

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asked 9 hours ago

juejue

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add a comment
 | 

2

When programing emacs (or common) lisp, how to discover (standard) function names (using emacs and working offline)?

Example: Let's say you want to shift bits of an integer, but you don't now the name of the function, which can do this (hint: the name is ash, but you don't know, yet).
apropos isn't helping you, because it does not list ash when asking for shift.

help documentation apropos

share|improve this question

edited 8 hours ago

Drew

51.4k44 gold badges6565 silver badges115115 bronze badges

asked 9 hours ago

juejue

1,80022 silver badges1313 bronze badges

add a comment
 | 

When programing emacs (or common) lisp, how to discover (standard) function names (using emacs and working offline)?

Example: Let's say you want to shift bits of an integer, but you don't now the name of the function, which can do this (hint: the name is ash, but you don't know, yet).
apropos isn't helping you, because it does not list ash when asking for shift.

help documentation apropos

share|improve this question

edited 8 hours ago

Drew

51.4k44 gold badges6565 silver badges115115 bronze badges

asked 9 hours ago

juejue

1,80022 silver badges1313 bronze badges

share|improve this question

edited 8 hours ago

Drew

51.4k44 gold badges6565 silver badges115115 bronze badges

asked 9 hours ago

juejue

1,80022 silver badges1313 bronze badges

share|improve this question

edited 8 hours ago

Drew

51.4k44 gold badges6565 silver badges115115 bronze badges

asked 9 hours ago

juejue

1,80022 silver badges1313 bronze badges

edited 8 hours ago

Drew

51.4k44 gold badges6565 silver badges115115 bronze badges

edited 8 hours ago

Drew

51.4k44 gold badges6565 silver badges115115 bronze badges

asked 9 hours ago

juejue

1,80022 silver badges1313 bronze badges

asked 9 hours ago

juejue

1,80022 silver badges1313 bronze badges

1 Answer
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3

Apropos help in Emacs is by no means limited to function apropos.

1. 
   

   M-x apropos documentation. It lets you match keywords or a regexp against doc strings. Very helpful when you don't know how the function might be named but you might be able to guess some words used in its doc.

   
   
   

   For example, M-x apropos-documentation RET shift bit RET shows you the names and doc for just the functions lsh and ash. Simple, effective.

   
   
   

   lsh
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, zeros are shifted in on the left.
   
   (fn VALUE COUNT)
   
   ----------------
   ash
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, the sign bit is duplicated.
   
   (fn VALUE COUNT)
   

   
   


2. 
   

   There are also these other Apropos commands:

   
   
   

   apropos-command
   apropos-follow
   apropos-function 
   apropos-library
   apropos-local-value
   apropos-local-variable
   apropos-option
   apropos-value
   apropos-variable
   

   
   
   

   See also apropos-fn+var.el.

   
   



3. The Emacs manual (C-h r), i, is your friend. Likewise, the Elisp manual (C-h i, choose Elisp).




4. Icicles apropos support -- including documentation-apropos commands, which provide the functionality of apropos-documentation, but which let you match against both the function name (e.g. parts of it) and the doc string.

In answer to your question in the comments, I don't really know how to find similar info for Common Lisp. Perhaps someone else will have a good answer about that. But:

• You can certainly use i in the CL Info manual provided by Emacs.


• Googling "common lisp docstring" turned up this StackOverflow question as the first hit. Perhaps it will help.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! Any idea how to do this for common lisp with slime and hyperspec installed? ;)
  
  – jue
  7 hours ago
  

  
  
  
  

add a comment
 | 

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3

Apropos help in Emacs is by no means limited to function apropos.

1. 
   

   M-x apropos documentation. It lets you match keywords or a regexp against doc strings. Very helpful when you don't know how the function might be named but you might be able to guess some words used in its doc.

   
   
   

   For example, M-x apropos-documentation RET shift bit RET shows you the names and doc for just the functions lsh and ash. Simple, effective.

   
   
   

   lsh
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, zeros are shifted in on the left.
   
   (fn VALUE COUNT)
   
   ----------------
   ash
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, the sign bit is duplicated.
   
   (fn VALUE COUNT)
   

   
   


2. 
   

   There are also these other Apropos commands:

   
   
   

   apropos-command
   apropos-follow
   apropos-function 
   apropos-library
   apropos-local-value
   apropos-local-variable
   apropos-option
   apropos-value
   apropos-variable
   

   
   
   

   See also apropos-fn+var.el.

   
   



3. The Emacs manual (C-h r), i, is your friend. Likewise, the Elisp manual (C-h i, choose Elisp).




4. Icicles apropos support -- including documentation-apropos commands, which provide the functionality of apropos-documentation, but which let you match against both the function name (e.g. parts of it) and the doc string.

In answer to your question in the comments, I don't really know how to find similar info for Common Lisp. Perhaps someone else will have a good answer about that. But:

• You can certainly use i in the CL Info manual provided by Emacs.


• Googling "common lisp docstring" turned up this StackOverflow question as the first hit. Perhaps it will help.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! Any idea how to do this for common lisp with slime and hyperspec installed? ;)
  
  – jue
  7 hours ago
  

  
  
  
  

add a comment
 | 

3

Apropos help in Emacs is by no means limited to function apropos.

1. 
   

   M-x apropos documentation. It lets you match keywords or a regexp against doc strings. Very helpful when you don't know how the function might be named but you might be able to guess some words used in its doc.

   
   
   

   For example, M-x apropos-documentation RET shift bit RET shows you the names and doc for just the functions lsh and ash. Simple, effective.

   
   
   

   lsh
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, zeros are shifted in on the left.
   
   (fn VALUE COUNT)
   
   ----------------
   ash
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, the sign bit is duplicated.
   
   (fn VALUE COUNT)
   

   
   


2. 
   

   There are also these other Apropos commands:

   
   
   

   apropos-command
   apropos-follow
   apropos-function 
   apropos-library
   apropos-local-value
   apropos-local-variable
   apropos-option
   apropos-value
   apropos-variable
   

   
   
   

   See also apropos-fn+var.el.

   
   



3. The Emacs manual (C-h r), i, is your friend. Likewise, the Elisp manual (C-h i, choose Elisp).




4. Icicles apropos support -- including documentation-apropos commands, which provide the functionality of apropos-documentation, but which let you match against both the function name (e.g. parts of it) and the doc string.

In answer to your question in the comments, I don't really know how to find similar info for Common Lisp. Perhaps someone else will have a good answer about that. But:

• You can certainly use i in the CL Info manual provided by Emacs.


• Googling "common lisp docstring" turned up this StackOverflow question as the first hit. Perhaps it will help.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you! Any idea how to do this for common lisp with slime and hyperspec installed? ;)
  
  – jue
  7 hours ago
  

  
  
  
  

add a comment
 | 

Apropos help in Emacs is by no means limited to function apropos.

1. 
   

   M-x apropos documentation. It lets you match keywords or a regexp against doc strings. Very helpful when you don't know how the function might be named but you might be able to guess some words used in its doc.

   
   
   

   For example, M-x apropos-documentation RET shift bit RET shows you the names and doc for just the functions lsh and ash. Simple, effective.

   
   
   

   lsh
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, zeros are shifted in on the left.
   
   (fn VALUE COUNT)
   
   ----------------
   ash
   Function: Return VALUE with its bits shifted left by COUNT.
   If COUNT is negative, shifting is actually to the right.
   In this case, the sign bit is duplicated.
   
   (fn VALUE COUNT)
   

   
   


2. 
   

   There are also these other Apropos commands:

   
   
   

   apropos-command
   apropos-follow
   apropos-function 
   apropos-library
   apropos-local-value
   apropos-local-variable
   apropos-option
   apropos-value
   apropos-variable
   

   
   
   

   See also apropos-fn+var.el.

   
   



3. The Emacs manual (C-h r), i, is your friend. Likewise, the Elisp manual (C-h i, choose Elisp).




4. Icicles apropos support -- including documentation-apropos commands, which provide the functionality of apropos-documentation, but which let you match against both the function name (e.g. parts of it) and the doc string.

In answer to your question in the comments, I don't really know how to find similar info for Common Lisp. Perhaps someone else will have a good answer about that. But:

• You can certainly use i in the CL Info manual provided by Emacs.


• Googling "common lisp docstring" turned up this StackOverflow question as the first hit. Perhaps it will help.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges

share|improve this answer

edited 6 hours ago

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges

answered 8 hours ago

DrewDrew

51.4k44 gold badges6565 silver badges115115 bronze badges