splittable: klare Fehler für -0 und mehr als 676 Stücke

2026-10-11 23:23:37 +02:00
parent 1c66773ff4
commit b11e3da453
6 changed files with 36 additions and 4 deletions
@@ -164,12 +164,14 @@ end
 Rdb.register('splittable', 'Divide a table horizontally', 'splittable [-n] table') do |args|
  n = 50
  n = args.shift[1..].to_i if args.first&.match?(/\A-\d+\z/)
-  die 'usage: splittable [-n] table' unless args.size == 1
+  die 'usage: splittable [-n] table   (n is at least 1)' unless args.size == 1 && n.positive?
+
  t = open_table(args[0])
+  chunks = t.rows.each_slice(n).to_a
+  die "#{args[0]}: #{t.rows.size} rows in pieces of #{n} need #{chunks.size} files, but there are only 676 names (aa to zz)" if chunks.size > 676
+
  suffix = ('aa'..'zz').each
-  t.rows.each_slice(n) do |chunk|
-    File.write("#{args[0]}#{suffix.next}", t.with(rows: chunk).to_s)
-  end
+  chunks.each { |chunk| File.write("#{args[0]}#{suffix.next}", t.with(rows: chunk).to_s) }
 end

 # ---- aggregates ------------------------------------------------------------