Rust and Go(medium.com)

  type dataSlice []*data

  // Len is part of sort.Interface.
  func (d dataSlice) Len() int {
      return len(d)
  }

  // Swap is part of sort.Interface.
  func (d dataSlice) Swap(i, j int) {
      d[i], d[j] = d[j], d[i]
  }

  // Less is part of sort.Interface. We use count as the value to sort by
  func (d dataSlice) Less(i, j int) bool {
      // WRONG : will crash if there's a nil in the list ...
      return d[i].count < d[j].count

      // Correct version
      if d[i] == nil {
          return true // note : true is an exported name, with no capital ... yet another inconsistency
      }
      if d[j] == nil {
          return false
      }
      return d[i].count < d[j].count
  }

  func main() {
    // create s of type []*data

    sort.Sort(s)
  }

  // create list of data in variable s
  s.sort(key=lambda x: x.count)

  // Create Vector<Data> in s
  sort(s.begin(), s.end(), [](const Data& d1, const Data& d2) { return d1.count < d2.count; });

  (bonus for the C++ version : it's behavior is defined and correct for nulls, just saying this because none of the other examples are, including the Go one)

  // Create List<Data> in s
  Collections.sort(s, (Data d1, Data d2) -> Integer.compare(d1.count, d2.count));

  > Therefore you can't make the mistake of unknowingly
  > concatenating a number and a string in Go.