VirtualTally _ Thing -- get a count from a tally

• Operator: _

• Usage:

  t_x

• Inputs:
  • t, a virtual tally
  • x, a thing
• Outputs:
  • an integer, the number of times x is counted by t

i1 : t = tally apply(1..10000, i -> # factor i)

o1 = Tally{0 => 1   }
           1 => 1280
           2 => 4097
           3 => 3695
           4 => 894
           5 => 33

o1 : Tally

i2 : t_5

o2 = 33

i3 : t_6

o3 = 0