Tally _ Thing -- get a count from a tally

Tally _ Thing -- get a count from a tally

Synopsis:

Operator: _

Input:

an instance of class Tally.

an instance of class Thing.

t_x -- returns the number of times x is counted by t.

See also:

Tally -- the class of all tally results

Code:

     -- ../../../Macaulay2/m2/set.m2:12
     Tally _ Thing := (a,b) -> if a#?b then a#b else 0