Irreal

Xah Lee has a nice post on some of the smaller additions to Emacs 24.4. Unless you like reading through NEWS files, this is a quick and easy way to find some nifty new features.

I found a couple of things that significantly reduced my workload in working with the Irreal .htaccess file. I have a script that pulls down the connection log from the hosting provider and calculates how many times each IP has tried to post a comment. Any IP that tried more than 20 times a day gets added to the deny list in the .htaccess file.

Two operations in this process are made considerably easier with the new features in Emacs 24.4. Part of the pipeline that generates the report that gets mailed to me each day, calls uniq -c which generates lines like

132 192.168.1.1

where the 132 is the number of times the IP tried to post a comment. The first thing I need to do is cut the counts from the file so that only the IPs remain. With Emacs 24.4, we have rectangle-mark-mode, which is bound to 【Ctrl+x Space】 for easy use. With it, it’s easy to mark the counts and delete them.

The next thing I do is append the new IPs to the end of the .htaccess file and then use a keyboard macro to add a “Deny from” to the beginning of each IP. For technical reasons the calculations are based on the log from two days ago so the new IPs can already be in the list and I needed to remove duplicates. I handled this by sorting the list and then piping it to uniq with 【Ctrl+u Meta+|】. That worked well but with Emacs 24.4 I can simply call delete-duplicate-lines without bothering with the sorting or using an external process.

Take a look at Lee’s post. Like me, you’re apt to find something to makes your life a little bit easier.

Gabriel Chavez notes that EWW has, in a sense, completed Emacs:

That's it. #emacs is officially an operating system now. pic.twitter.com/KU3ODWXqIH

— gabriel_chavez (@gabriel_chavez) October 20, 2014

Not everyone, though, is impressed:

#Emacs's new web browser is called eww. Appropriate name I'd say.

— Diego Elio Pettenò (@flameeyes) October 20, 2014

Artur Malabarba has a nuanced list of things he’d like to see in Emacs 25. While most of us are still getting used to Emacs 24.4, Malabarba has thought carefully about what Emacs needs to move forward.

I’m sure most of us will be on board with his suggestions. He wants name spaces, concurrency, dynamic library loading, a better customization interface, and an enhanced package menu. He explains why each of these things is critical for Emacs and why they will help Emacs move ahead.

As his fans know, Malabarba mostly writes short posts that illustrate some point of Emacs arcana or provides a bit of Elisp to performs a useful function. This post is longer than normal and has a slightly different focus but it’s well worth taking a look at. As I said, I’m sure you’ll be in agreement with most if not all of his points.

I’ve written before about the excellent videos that Emacs NYC produces from their monthly meetings where one of the members gives a talk on some aspect of Emacs. This month, Jacob O’Donnell gives a nice talk on keyboard macros. It’s easiest to view it on YouTube.

As O’Donnell says, there’s not a lot to know about keyboard macros but there are some lessor known corners that can be very useful, such as editing, saving, or naming them. This talk is an excellent introduction that will tell you everything you will probably ever need to know.

Here at Irreal, we sometimes run EmacsGolf challenges and very often the best solutions make use of a keyboard macro. Tim Visher also used them in several of his EmacsGolf videos and I often use them for some repetitive one-off editing job that it’s not worth writing Elisp for. Keyboard macros should be in every Emacser’s toolkit. Usually all you need to remember are the【F3】 and【F4】 keys. For more complex tasks, help is just a【Ctrl+h i】away. I have the keyboard macro Info documentation bookmarked for easy access.

If you’re a MELPA user you might have heard that the URL for the site has changed. It’s easy to miss the significance of that for your Emacs configuration though. You have to change the package-archives list to reflect the new URL. That is, you have to change

(add-to-list 'package-archives
             '("melpa" . "http://melpa.milkbox.net/packages/"))

to

(add-to-list 'package-archives
             '("melpa" . "http://melpa.org/packages/"))

The old address is still working (it redirects to http://melpa.org) but you should change your configuration before it stops working.