Add From Ruby Variables To JavaScript Variables as a vim til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_568 TILs and counting..._
+_569 TILs and counting..._
 
 ---
 
@@ -585,6 +585,7 @@ _568 TILs and counting..._
 - [Filter Lines Through An External Program](vim/filter-lines-through-an-external-program.md)
 - [Fix The Spelling Of A Word](vim/fix-the-spelling-of-a-word.md)
 - [Format Long Lines To Text Width](vim/format-long-lines-to-text-width.md)
+- [From Ruby Variables To JavaScript Variables](vim/from-ruby-variables-to-javascript-variables.md)
 - [Generate and Edit Rails Migration](vim/generate-and-edit-rails-migration.md)
 - [Get The pid Of The Session](vim/get-the-pid-of-the-session.md)
 - [Go To File With Line Number](vim/go-to-file-with-line-number.md)

vim/from-ruby-variables-to-javascript-variables.md

@@ -0,0 +1,24 @@
+# From Ruby Variables To JavaScript Variables
+
+I sometimes find myself writing so much Ruby that as soon as I am back in
+a JavaScript file, my code starts looking like this:
+
+```javascript
+const my_javascript_var = 123;
+```
+
+It would be easy enough to hit `caw` to the delete the entire word and then
+retype it as camel case. I happen to have the
+[Abolish.vim](https://github.com/tpope/vim-abolish) plugin installed, so
+there is an even quicker way.
+
+If I hit `crc` over the variable, it will be _coerced_ to camel case.
+
+```javascript
+const myJavascriptVar = 123;
+```
+
+If I hit `crs` then it will be _coerced_ back to snake case. Hit `crc` one
+more time and I can get back to writing some JavaScript.
+
+See `:h abolish-coercion` for more details.