Created
July 12, 2012 17:57
-
-
Save khaije1/3099675 to your computer and use it in GitHub Desktop.
fun w/ elisp
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
;intern is a built-in function in `C source code'. | |
;| | |
;|(intern STRING &optional OBARRAY) | |
;| | |
;|Return the canonical symbol whose name is STRING. | |
;|If there is none, one is created by this function and returned. | |
;|A second optional argument specifies the obarray to use; | |
;|it defaults to the value of `obarray'. | |
;#DEMO: reflection in elisp | |
;#DEMO: create variable named after the contents, then assign contents to new variable | |
(defun reflect-value-to-symbol (value) | |
"assign value to symbol 'value, then return symbol" | |
(interactive "s") | |
(if (stringp value) | |
(let ((tmp value)) | |
(set (intern value) (format "<%s>" value)) | |
(intern value)))) | |
;test | |
(let | |
((anon-symbol (reflect-value-to-symbol "test-var"))) | |
(concat "the value of " (symbol-name anon-symbol) " is " (eval anon-symbol))) | |
;#OUTPUT: ==> "the value of test-var is <test-var>" |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
;;; | |
;;; region-md5-to-kill-ring - | |
;;; generate a distinct charcode from region and insert into paste (aka kill) ring | |
;; | |
(defun region-md5-to-kill-ring | |
;function docstring (optional) | |
"generate a largely distinct charcode from region and inserts this data into paste (aka kill ring)" | |
(;input variables list | |
length ;the length of the returned hash, defaults to 0 or 'not truncated' | |
) | |
(interactive argument-passing-info ;optional | |
) | |
(;function body | |
;sanitize inputs, apply defaults | |
(if | |
(not (bound-and-true-p length)) | |
;then | |
(setq length 6) | |
) | |
;work | |
(setq input | |
(buffer--substring (region-beginning) (region-end)) | |
) | |
(if | |
(= length 0) | |
(;then | |
(setq outcome | |
(substring | |
(md5 input) | |
(;else | |
0 length | |
;outcome |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment