argfirst

argfirst, function

def vector argfirst(): boolean

Returns true for the first value of the group according to the ordering. The group is optional; when a group is provided, the function returns true once per group.

Examples

table T = with
  [| as N, as G |]
  [| 0, "b" |]
  [| 3, "a" |]
  [| 2, "a" |]
  [| 1, "a" |]

T.A = argfirst() sort T.N
T.B = argfirst() by T.G sort T.N

show table "" with
  T.N
  T.G
  T.A
  T.B

Output:

See also

• arglast.