implemented a simple search for memes

It might be good to abstract this into a search method:

```ruby
@memes = Meme.search(params[:query])
```

and in the `Meme` model:

```ruby
class Meme < ActiveRecord::Base
  def self.search(query)
    where('name ILIKE ?', "%#{query}%")
  end
end
```

If you ever change how you search (e.g. searching multiple columns or using full-text search) you can just change this method and everywhere you call `.search` will be updated.