“Highlighting Text in Rails “

Presumably you’ve seen those Web 2.0 sites that highlight random words in the marketing text to draw your attention. A little-known view helper in Rails makes this sort of thing trivial. For example, you can combine this markup in your view:
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1.

With this bit of CSS:
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1. .highlight { background:#ff0; }

.highlight { background:#ff0; }

And you get this result:

highlight

Easy enough. But wait, there’s more! You can specify an entire array of words and phrases to highlight:
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1.

Even better, highlight supports a :highlight option, which lets you specify a custom string to use for highlighting. The token \1 will be replaced with the text to be highlighted. This lets you change the HTML markup:
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1. ‘\1‘) %>

‘\1‘) %>

This ability to insert arbitrary surrounding markup makes highlight more flexible, if you let yourself think out of the box:
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1. ‘\1) %>

‘\1) %>

It’s worth taking a dip into ActionView::Helpers occasionally to see what other bits of functionality are lurking that you’ve forgotten about.

Source : http://afreshcup.com/2009/01/29/highlighting-text-in-rails/

rails, highlight text in rails