[samigo-team] A note on floating point equality

[David Horwitz]

Hi Gang,

Just a note on a common mistake made with floating point precision I saw 
while fixing SAM-1562. Basically it is a misunderstanding of the 
difference between rounding and limiting the precision of the float.

In this case a float was cast to a double:

Double.valueOf(Float)


rather than rounded and cast to a Double:

Double.valueOf(MathUtils.round(Float, 2))

in the former case a float that was something in the region of 
99.99999999999*% was being sent to the gradebook as 99.99% rather than 100%

regards

David