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-#+TITLE: Aligning columns in Emacs
-#+DATE: 2021-03-26T11:27:34-04:00
-#+DRAFT: false
-#+DESCRIPTION: How to align text separated by whitespace using Emacs
-#+TAGS[]: emacs elisp
-#+KEYWORDS[]: emacs elisp
-#+SLUG:
-#+SUMMARY:
-
-#+ATTR_HTML: :alt Before and after columns aligned
-#+ATTR_HTML: :title Before and after aligned columns
-[[file:cover.png]]
-
-I've been writing a lot of GraphQL resolvers in ruby at work recently,
-and frequently run into a situation where I have to align many columns
-of text by hand. I figured this isn't a very unique problem, and that
-there was probably already some code within Emacs to handle it.
-
-As it turns out I was correct in my assumption. There's an excellent
-built-in package called =align= that takes care of just that.
-
-Many of the features of the =align= package are mode-specific, but I
-just wanted a function that can align columns regardless of which mode
-they're used in. There's a function that's part of the package that
-can be used for just that fortunately, =align-regexp=, which takes a
-regular expression as input and uses it to guide the alignment.
-
-I was able to use it to make a generic function.
-
-#+begin_src elisp
-(defun align-non-space (BEG END)
-  "Align non-space columns in region BEG END."
-  (interactive "r")
-  (align-regexp BEG END "\\(\\s-*\\)\\S-+" 1 1 t))
-#+end_src
-
-Let's walk through what's going on here.
-
-- =BEG= and =END= are the beginning and end positions of the area to be aligned
-- =(interactive "r")= tells Emacs that the function is interactive,
-  meaning that it can be called from the =M-x= menu
-  - ="r"= tells Emacs that when the function is called interactively, it expects a
-    region (beginning and end points) as arguments
-- =align-regexp= where the work is happening. This function has the
-  following signature.
-  #+begin_src elisp
-  (align-regexp BEG END REGEXP &optional GROUP SPACING REPEAT)
-  #+end_src
-
-  - =BEG= and =END= is the region that it expects as the first arguments
-  - ="\\(\\s-*\\)\\S-+"= is an Emacs regular expression. Backslashes
-    are doubled because they need to be escaped in a string literal
-    - =\( \)= is a capture group
-      - =\s-= is a [[https://www.gnu.org/software/emacs/manual/html_node/elisp/Regexp-Backslash.html][regular expression construct]] specific to Emacs which
-        specifies a type of /syntax/ which is to be matched.
-        - =-= refers to the [[https://www.gnu.org/software/emacs/manual/html_node/elisp/Syntax-Class-Table.html][whitespace characters]]
-      - =*= means match zero or more
-    - =\S-= is similar to the previous construct, but instead means to
-      match anything /other/ than whitespace
-    - =+= means one or more
-  - =1= here refers to the group within the regex that will be
-    modified to align the fields
-  - =1= is the number of spaces between fields once aligned
-  - =t= indicates to repeat the rule multiple times on the same line
-
-To use this function, simply highlight a region you want to align and
-run =M-x align-non-space=.