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I need to concatenate path string as follows, so I added the following lines to my .emacs file:
(setq org_base_path "~/smcho/time/") (setq org-default-notes-file-path (concatenate 'string org_base_path "notes.org")) (setq todo-file-path (concatenate 'string org_base_path "gtd.org")) (setq journal-file-path (concatenate 'string org_base_path "journal.org")) (setq today-file-path (concatenate 'string org_base_path "2010.org")) When I do C-h v today-file-path RET to check, it has no variable assigned.
What's wrong with my code? Is there any other way to concatenate the path string?
I found that the problem was caused by the wrong setup, the code actually works. Thanks for the answers which are better than my code.
526
You concatenate strings by using the + operator. For string literals and string constants, concatenation occurs at compile time; no run-time concatenation occurs. For string variables, concatenation occurs only at run time.
C++ has a built-in method to concatenate strings. The strcat() method is used to concatenate strings in C++. The strcat() function takes char array as input and then concatenates the input values passed to the function.
The same + operator you use for adding two numbers can be used to concatenate two strings. You can also use += , where a += b is a shorthand for a = a + b .
You can use (concat "foo" "bar") rather than (concatenate 'string "foo" "bar"). Both work, but of course the former is shorter.
198
Use expand-file-name to build filenames relative to a directory:
(let ((default-directory "~/smcho/time/")) (setq org-default-notes-file-path (expand-file-name "notes.org")) (setq todo-file-path (expand-file-name "gtd.org")) (setq journal-file-path (expand-file-name "journal.org")) (setq today-file-path (expand-file-name "2010.org"))) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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