Concatenate strings in elisp

emacs elisp
prosseek picture prosseek · Sep 16, 2010 · Viewed 26.7k times · Source

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?

EDIT

I found that the problem was caused by wrong setup, the code actually works. Thanks for the answers which are better than my code.

Answer

offby1 picture offby1 · Sep 17, 2010

You can use (concat "foo" "bar") rather than (concatenate 'string "foo" "bar"). Both work, but of course the former is shorter.

Related questions

How do I set the size of Emacs' window?

I'm trying to detect the size of the screen I'm starting emacs on, and adjust the size and position the window it is starting in (I guess that's the frame in emacs-speak) accordingly. I'm trying to set up my .emacs …

Read More
How do I create an empty file in emacs?

How can I create an empty file from emacs, ideally from within a dired buffer? For example, I've just opened a Python module in dired mode, created a new directory, opened that in dired, and now need to add an …

Read More
How to achieve code folding effects in Emacs?

Whats the best way to achieve something like code folding, or the type of cycling that org-mode uses. What would be the best solution in elisp to create this type of behavior? EDIT: I'm sorry I was not clear. I …

Read More