map-example

map-example.zeek

# An example of using custom types to implement map/filter functionality in scriptland


global v: vector of int = {-10, -1, 0, 1, 10, -999};
type map_func: function(a: any): any;
global positive_filter: map_func;

function map(v1: vector of any, mf: map_func): vector of any {
  local v2: vector of any;
  for (idx in v1) {
    v2 += mf(v1[idx]);
  }
  return v2;
}

function positive_filter(i: int): bool {
  if (i > 0) {
    return T;
  }
  return F;
}

print map(v, positive_filter);