Support updated emacs

Finally ported my up-to-date emacs configuration here. I was putting
this off for a long while, unsure of how to handle all of the work. All
it took was my laptop being fried to force me to do this. So... voila!

emacs.d/wpc/string-functions.el

@@ -0,0 +1,41 @@
+;; functions.el --- String helper functions for my Emacs development -*- lexical-binding: t -*-
+;; Author: William Carroll <wpcarro@gmail.com>
+
+;;; Commentary:
+;; String & Symbol helpers!
+
+;;; Code:
+
+(require 'dash)
+(require 's)
+
+;; Strings
+(defun string/hookify (x)
+  "Append \"-hook\" to X."
+  (s-append "-hook" x))
+
+(defun string/ensure-hookified (x)
+  "Ensure that X has \"-hook\" appended to it."
+  (if (s-ends-with? "-hook" x)
+      x
+    (string/hookify x)))
+
+;; Symbols
+(defun symbol/as-string (callback x)
+  "Treat the symbol, X, as a string while applying CALLBACK to it.
+Coerce back to a symbol on the way out."
+  (->> x
+       symbol-name
+       callback
+       intern))
+
+(defun symbol/hookify (x)
+  "Append \"-hook\" to X when X is a symbol."
+  (symbol/as-string #'string/hookify x))
+
+(defun symbol/ensure-hookified (x)
+  "Ensure that X has \"-hook\" appended to it when X is a symbol."
+  (symbol/as-string #'string/ensure-hookified x))
+
+(provide 'string-functions)
+;;; string-functions.el ends here