Prime numbers p for which the sum of primes less than or equal to p is prime: Difference between revisions

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 =={{header|Sidef}}==
-<lang ruby>func primes_with_prime_sum(n) {
+<lang ruby>func primes_with_prime_sum(n, callback) {
     var s = 0
-    var list = []
     n.each_prime {|p|
         s += p
-        list << [p, s] if s.is_prime
+        callback(p, s) if s.is_prime
     }
-    list
 }
-for p,s in (primes_with_prime_sum(1000)) {
+primes_with_prime_sum(1000, {|p,s|
     say "prime: #{'%3s' % p}   prime sum: #{'%5s' % s}"
-}</lang>
+})</lang>
 {{out}}
 <pre>