I have to say this is very unintuitive. In Nushell, you'd do:

  ls | each { ... }

Another examples I don't need to explain, which would be far harder in stringly typed shells:

  ls | where type == file and size <= 5MiB | sort-by size | reverse | first 10

  ps | where cpu > 10 and mem > 1GB | kill $in.pid

It's immediately obvious what you need to do when you can easily visualize your data:

  > ls
  ╭────┬───────────────────────┬──────┬───────────┬─────────────╮
  │ #  │         name          │ type │   size    │  modified   │
  ├────┼───────────────────────┼──────┼───────────┼─────────────┤
  │  0 │ 404.html              │ file │     429 B │ 3 days ago  │
  │  1 │ CONTRIBUTING.md       │ file │     955 B │ 8 mins ago  │
  │  2 │ Gemfile               │ file │   1.1 KiB │ 3 days ago  │
  │  3 │ Gemfile.lock          │ file │   6.9 KiB │ 3 days ago  │
  │  4 │ LICENSE               │ file │   1.1 KiB │ 3 days ago  │
  │  5 │ README.md             │ file │     213 B │ 3 days ago  │
  ...