[unscaled]

I feel like Go's concept of readability is very Blub-oriented[1]. Can a Blub programmer read this line? Then it's readable. Sometimes Go fans would say that this code:

  var result := []string{}
  for i = 0; i < items.Length(); i++ {
    item := items.Get(i)
    if item < threshold {
      result = append(result, converToString(item))
    }
  }

return result

I more readable than this code:

  return items
    .filter { it < threshold }
    .map    { convertToString(it) }

The argument is that everybody understand what the loop does, it's just a stupid loop. Bring back an an Algol 68, Pascal or C programmer from the 70s and they all understand what a for loop is. But my second example requires you to learn about filter and map and closures and implicit parameters like 'it'.

Of course, once you do understand these very complicated concepts, the code above is far more readable: it clearly states WHAT the program does (filtering all values below the threshold and converting them to string) rather than HOW it does that (which nobody cares about). "readability" here is only counted from the narrow perspective of an imperative programmer who is not familiar with functional declarative data processing.

I feel the same about the "ro" examples in the OP. I don't particularly like that ro takes (mostly because Go forces its hand, I assume), like having to put everything in an explicit pipe, but I find the example far more readable than the pure Go example which combines loops, channels and WaitGroups. That's far worse than the loop example I gave in this reply, to be honest, and I really don't know why people say this example is readable. I guess you can optimize it a little, but I always found both channel and WaitGroups waitable, unreadable and error prone. They are only "readable" in narrow perverted sense that has somehow become prevalent in the Go community, where "readability" is redefined to mean: no closures, no immutable values, no generics, no type safety and certainly nothing that smells like FP.

[1] https://wiki.c2.com/?BlubParadox