ref is similar to a pointer except that the garbage collector handles it. if
you think about how a ref is created
type
simpleRef = ref simpleObj
simpleObj = object
proc createSimpleRef():simpleRef =
result = new simpleObj
Run
the `new` keyword just allows the GC to allocate space for the `simpleObj` and
lets it keep track of if it is still being used or can be freed
generally if you are planning on creating an object once and using it in many
places, i would recommend a `ref` but if you plan on using an object quickly
say just inside a `proc` then a simple object would do fine
