I have a little function called format_price(price) that simply formats
argument as a dollar sign, dollar amount, dot and penny amount. Then, in
a .rhtml file, I could do this:
<%= format_price(item.unit_price * item.quantity) %>
But where do I put the format_price() function definition? The app
find it in app/controllers/application.rb. Where do I put it so it’s
available to all views?