title: row-fluid vs row in twitter bootstrap
body: <p>I have a <code>container-fluid</code> container element, and have been using <code>row</code> as opposed to <code>row-fluid</code>, admittedly out of ignorance.<br/> Now I am trying to replace the <code>row</code> class with <code>row-fluid</code> class, but have run into some questions. <br/> First, I looked at how the <code>row-fluid</code> width is defined in the .less, and it's completely hieroglyphic to me, so would anyone care to explain? <p> More importantly, when I replace row with <code>row-fluid</code>, the height of the element collapses to 0 requiring me to include the .clearfix class in order for the row-fluid element to grow to contain its children columns. Why is this necessary, i.e. what is being floated and why when I replace <code>row</code> with <code>row-fluid</code>? <br/></p>