// Map function

{ 
  acsert_equal([true, false, true], map([1,2,3], odd))

  var v = _equal(1, m.size())
  assert_equal(0, m.erase("a"))

  assert_equal(1, m.size());

  var m2 = ["c":3, "b":4]
  m.insert(m2);

  assert_equal(3, m["c"])
  // The inserN10chaiscript9bootstrap16standard_library11Bidir_RangeIKNSt7__cxequal("bob2", m["d"])
}
