emacs programming

C-M-h : select the whole function

M C-\ indent region between cursor and mark
M-m move to first (non-space) char in this line
M-^ attach this line to previous
M-; formatize and indent comment
C, C++ and Java Modes
M-a beginning of statement
M-e end of statement
M C-a beginning of function
M C-e end of function
C-c RETURN Set cursor to beginning of function and mark at the end
C-c C-q indent the whole function according to indention style
C-c C-a toggle modus in which after electric signs (like {}:';./*) emacs does the indention
C-c C-d toggle auto hungry mode in which emacs deletes groups of spaces with one del-press
C-c C-u go to beginning of this preprocessor statement
C-c C-c comment out marked area
More general (I guess)
M-x outline-minor-mode collapses function definitions in a file to a mere {...}
M-x show-subtree If you are in one of the collapsed functions, this un-collapses it
In order to achive some of the feats coming up now you have to run etags *.c *.h *.cpp (or what ever ending you source files have) in the source directory
M-. (Thats Meta dot) If you are in a function call, this will take you to it's definition
M-x tags-search ENTER Searches through all you etaged
M-, (Meta comma) jumps to the next occurence for tags-search
M-x tags-query-replace yum. This lets you replace some text in all the tagged files


C-M-n
Move forward over a parenthetical group (forward-list).
C-M-p
Move backward over a parenthetical group (backward-list).
C-M-u
Move up in parenthesis structure (backward-up-list).
C-M-d
Move down in parenthesis structure (down-list).

regular expression

Regular Expression	Class	Type	Meaning
_
.	all	Character Set	A single character (except newline)
^	all	Anchor	Beginning of line
$	all	Anchor	End of line
[...]	all	Character Set	Range of characters
*	all	Modifier	zero or more duplicates
\<	Basic	Anchor	Beginning of word
\>	Basic	Anchor	End of word
\(..\)	Basic	Backreference	Remembers pattern
\1..\9	Basic	Reference	Recalls pattern
_+	Extended	Modifier	One or more duplicates
?	Extended	Modifier	Zero or one duplicate
\{M,N\}	Extended	Modifier	M to N Duplicates
(...|...)	Extended	Anchor	Shows alteration
_
\(...\|...\)	EMACS	Anchor	Shows alteration
\w	EMACS	Character set	Matches a letter in a word
\W	EMACS	Character set	Opposite of \w

POSIX character sets

POSIX added newer and more portable ways to search for character sets. Instead of using [a-zA-Z] you can replace 'a-zA-Z' with [:alpha:], or to be more complete. replace [a-zA-Z] with [[:alpha:]]. The advantage is that this will match internetional character sets. You can mix the old style and new POSIX styles, such as
grep '[1-9[:alpha:]]'
Here is the fill list

Character Group	Meaning
[:alnum:]	Alphanumeric
[:cntrl:]	Control Character
[:lower:]	Lower case character
[:space:]	Whitespace
[:alpha:]	Alphabetic
[:digit:]	Digit
[:print:]	Printable character
[:upper:]	Upper Case Character
[:blank:]	whitespace, tabe, etc.
[:graph:]	Printable and visible characters
[:punct:]	Puctuation
[:xdigit:]	Extended Digit

Note that some people use [[:alpha:]] as a notation, but the outer '[...]' specifies a character set.