Pose the question “Is there ever a time when Emacs users should be running out-of-date bytecode instead of the up-to-date bytecode or lisp?” to yourself.
All Emacs users should probably run auto-compile.
Tag: Ide
Using Eshell for su and Remembering Your Password
Eshell can be used for su and will quite happily remember your password according to this answer.
Expanding and Using Abbreviations in Emacs
A defined abbrev is a word which expands, if you insert it, into some different text.
They are really simple and really helpful if you like this kind of thing. If you grew up hacking on Java, then you surely already use this in IntelliJ IDEA!
Here is a nice post on how to choose and define abbrevs based upon actual usage.
Using Units in Calc with Emacs
Calc is an advanced desk calculator and mathematical tool written by Dave Gillespie that runs as part of the GNU Emacs environment.
One special interpretation of algebraic formulas is as numbers with units. For example, the formula
5 m / s^2can be read “five meters per second squared.”
Of course it can!
emacs-refactor: A Generic Refactoring Tool for Emacs
Emacs Refactor (EMR) provides language-specific refactoring support for Emacs. It has a simple declarative interface for easy extension.
Easily check src block correctness in org-mode
Thank you Nicolas Goaziou, for the beginnings of an org-lint. The goal here was to:
- Report an error if there is a source block without a language
specified - Report an error if there is a source block with a language specified
that is not present in `org-babel-load-languages’
And, it does.
(defun gcr/src-block-check ()
(interactive)
(org-element-map (org-element-parse-buffer 'element) 'src-block
(lambda (src-block)
(let ((language (org-element-property :language src-block)))
(cond ((null language)
(error "Missing language at position %d"
(org-element-property :post-affiliated src-block)))
((not (assoc-string language org-babel-load-languages))
(error "Unknown language at position %d"
(org-element-property :post-affiliated src-block)))))))
(message "Source blocks checked in %s." (buffer-name (buffer-base-buffer))))
Addendum: 2015-02-05
Sebastien Vauban just posted his improved version to:
– “Check as well for the language of inline code blocks,”
– “Report the line number instead of the char position.”
(defun org-src-block-check ()
(interactive)
(org-element-map (org-element-parse-buffer)
'(src-block inline-src-block)
(lambda (sb)
(let ((language (org-element-property :language sb)))
(cond ((null language)
(error "Missing language at line %d in %s"
(org-current-line
(org-element-property :post-affiliated sb))
(buffer-name)))
((not (assoc-string language org-babel-load-languages))
(error "Unknown language `%s' at line %d in `%s'"
language
(org-current-line
(org-element-property :post-affiliated sb))
(buffer-name)))))))
(message "Source blocks checked in %s." (buffer-name (buffer-base-buffer))))
Not seeing this post on the web yet so no link.
Notes on ALEC
Last week I blogged about pushing ALEC out to GitHub. My focus there was 100% philosophical, and I barely said a thing about the details. This post is to share some of the details.
ALEC is my 5th attempt and configuring Emacs for myself. After spending nearly a year practicing Org-Mode, this version feels much better than the last. The biggest note is that the system compiles in 27 seconds instead of 600 seconds!
The old approach was to generate both a lightweight and heavyweight configuration file, but that is gone now. With a 27s tangle time, you can easily comment out the source block noweb-references to build what you want quite easily.
Package management was the major theme. Cask has worked perfectly, and I wanted to see how easy easily that I could deploy this system on Windows. When I set out to do so, Cask did not have Windows support. Now I think it does, but I’m not going to pursue it right now. Package seems to do quite well, despite some nagging behavior that still exists (noted in the system) of not installing packages sometimes.
The packages are packaged up and stored in GitHub. Heresy? Perhaps. It is a best attempt at capturing the entirety of a working system, so that I and even others have an example or proof that it does what it should be doing.
Literate programming here is done with Org-Mode. It is an insanely delightful and hyper productivity enhancing tool. It is so simple that the 99% will dismiss it as a “markup language”, and the 1% will soon find that the painful-gap between exploration, implementation, and reflection can now be totally and completely removed regardless of the implementation artifact that you use to perform these three critical tasks.
ALEC's a Language for Expressing Creativity
ALEC is the new configuration of my Emacs/Organization-Mode system. Just wanted to share some thoughts on the experience. The code says a lot, and the text, too, but I’m more interested in the experience.
For context, this is the next step of TC3F.
If nothing else, just know that the tangle time went down from 10m to 27 seconds :).
Continue reading “ALEC's a Language for Expressing Creativity”
Don't run mode hooks during org exports
binchen has a nice post about how to disable org mode hook execution during exports. It can be a surprise when you run in batch mode and your export breaks because of dependency failures. Oh yea, the major mode hooks run during export even though you personally are not opening a buffer, Emacs is doing so!
Here is his solution:
(defun is-buffer-file-temp ()
(interactive)
"If (buffer-file-name) is nil or a temp file or HTML file converted from org file"
(let ((f (buffer-file-name))
(rlt t))
(if f
(if (and (not (string-match temporary-file-directory f))
(not (file-exists-p (replace-regexp-in-string "\.html$" ".org" f))))
(setq rlt nil)))
rlt))
Interesting.