ISBN Verifier

Ringkasan Tantangan

Check if a given string is a valid ISBN-10 number.

Visit the isbn-verifier exercise on Exercism to read the full instructions and download the exercise files.

Community Solutions

Lihat Solusi Komunitas

The following are the top 3 community solutions by stars:

Solution 1 by @anseok (⭐ 1) — View on Exercism
Solution 2 by @Evan-Hock (⭐ 0) — View on Exercism
Solution 3 by @Rohankapri (⭐ 0) — View on Exercism

Source: Exercism awk/isbn-verifier

💡 Lihat Solusi

END {
  gsub(/-+/, "")
  if (!match($0, /^[0-9]{9}[0-9X]$/)) { print "false"; exit }
  n = substr($0, 10, 1); if (n == "X") n = 10
  for (i = 1; i < 10; ++i) n += (11 - i) * substr($0, i, 1)
  print n % 11 ? "false" : "true" }