Class: Prime
Instance Method Summary collapse
-
#[](range) ⇒ Object
Return an array of prime numbers within the specified range.
Instance Method Details
#[](range) ⇒ Object
Return an array of prime numbers within the specified range. (It still has to generate all the primes less than the lower bound, so, yeah… be warned.)
496 497 498 499 500 501 502 503 504 505 506 507 508 |
# File 'lib/epitools/core_ext/numbers.rb', line 496 def [](range) ubound = range.end lbound = range.begin ubound -= 1 if range.exclude_end? generator = each(ubound) n = nil loop do break if (n = generator.succ) >= lbound end [n, *generator.to_a] end |