The Julia team has made it a convention to end functions with a '!' that alter your input variables. http://docs.julialang.org/en/latest/stdlib/base/ http://do

The Julia team has made it a convention to end functions with a '!' that alter your input variables. http://docs.julialang.org/en/latest/stdlib/base/ http://docs.julialang.org/en/latest/stdlib/base/ (4th point)