arguments of parseFloat?

parseFloat(o.get('bar1_value'),10) in totals = _.reduce(findObjs({ pageid: page, type: 'graphic', isdrawing: false, layer: 'objects' }),function(m,o){ m.bar1+=parseFloat(o.get('bar1_value'),10) || 0; m.bar2+=parseFloat(o.get('bar2_value'),10) || 0; m.bar3+=parseFloat(o.get('bar3_value'),10) || 0; return m; },{ bar1: 0, bar2: 0, bar3: 0 }); what's that second argument for parseFloat? The maximum number of characters in the string that are parsed?

It's an error, which happens to work out because of the way Javascript handles function arguments (specifically, because it ignores extra arguments).  Presumably, the author either converted from parseInt to parseFloat at some point without fixing up the arguments or thought that parseFloat takes the same arguments as parseInt (which accepts a radix as an optional second argument).

Cool thanks :D

A bit of both. :). Strange that it doesn't take a radix, you'd think it would mirror parseInt().