Changing datatable scrollY to fill parent's space

I am trying to get a datatable to dynamically adjust it's scroll height to fill its parent's space. I found this article:
https://datatables.net/forums/discussion/30255/automatically-resize-table-if-parent-container-size-was-changed
Which is similar in that it changes the pagination to try to make the table fit its parent's space, but I don't want pagination, I just want to update scrollY. Does anyone have the un-obfuscated code that I could modify? Or has someone already done this?