week2

README.md

@@ -5,3 +5,7 @@ My assignments for each week of Hoon 101.
 ## Week 1
 
 > Create a naked generator that takes an atom and returns the same atom cast to any aura
+
+## Week 2
+
+> Build a naked generator that takes a noun and checks if that noun is a cell or an atom. If that input noun is an atom, check if it’s even or odd.  The output should be of the tape type.

week1/week1.hoon

@@ -4,3 +4,4 @@
 |=  inp=@        :: 1 - create a gate with one atom input, 'inp'
 ^-  @p           :: 2 - use kethep to cast inp to a planet aura
 inp              :: 3 - close the kethep, and ergo close the bartis
+

week2/week2.hoon

@@ -0,0 +1,14 @@
+:: Hoon School - Week 2
+:: ~bannum-magtus || s@p7.co.nz
+::
+|=  a=*                     :: 
+^-  tape                    :: explicitly return a tape
+%-  weld                    :: weld some strings to reduce repitition
+:-  "input is "             ::
+?:  .?(a)                   :: first branch, test whether a is a cell
+  "a cell"                  ::
+%-  weld  :-                :: if not, take the atom branch
+?:  =((mod (@ a) 2) 0)      :: this cast is safe as we know a is an atom
+  "an even"                 ::
+  "an odd"                  ::
+" atom"                     ::