Add Delete Every Other Line as a vim til.

README.md

@@ -235,6 +235,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Count the Number of Matches](vim/count-the-number-of-matches.md)
 - [Create A New Directory In netrw](vim/create-a-new-directory-in-netrw.md)
 - [Create A New File In A New Directory](vim/create-a-new-file-in-a-new-directory.md)
+- [Delete Every Other Line](vim/delete-every-other-line.md)
 - [Delete Lines That Match A Pattern](vim/delete-lines-that-match-a-pattern.md)
 - [Deleting Directories Of Files From netrw](vim/deleting-directories-of-files-from-netrw.md)
 - [Edges Of The Selection](vim/edges-of-the-selection.md)

vim/delete-every-other-line.md

@@ -0,0 +1,21 @@
+# Delete Every Other Line
+
+You can delete every other line in the current buffer using the following
+command.
+
+There is a fairly elegant way in vim to delete every other line in the
+current buffer. Why would you want to do that? I don't know. Nevertheless,
+here it is:
+
+```
+:g/^/+d
+```
+
+This will essentially delete all even numbered lines. If you'd like to
+delete all odd numbered lines, delete the first line in the file (`ggdd`)
+and then run the same command as above.
+
+This syntax is a bit awkward, so you may be better off going straight for a
+macro (e.g. `qqjddq5@q` or `qqddjq5@q`).
+
+[source](http://stackoverflow.com/questions/1946738/vim-how-to-delete-every-second-row)