pascal triangles problem
equations problem trying: WIP
update a list with the abs val of elements
filtering list; have only elems which are lesser than some specified number
add odd numbers in a list
added better vesion:
bug filter
list replication
a length function
removed odd numbered list elements
efficient reversing of list
probs 13,14,15,16:
encodeDirect, Duplicate, Replicate, dropEvery