Flowdock
check_until(p1) public

This returns the value that #scan_until would return, without advancing the scan pointer. The match register is affected, though.

  s = StringScanner.new("Fri Dec 12 1975 14:39")
  s.check_until /12/          # -> "Fri Dec 12"
  s.pos                       # -> 0
  s.matched                   # -> 12

Mnemonic: it "checks" to see whether a #scan_until will return a value.

Show source
Register or log in to add new notes.