Preben Ingvaldsen@quakeaddictUnited StatesFollowVerified SkillsCertificate: Ruby (Basic)VerifiedCertificate: Ruby (Intermediate)VerifiedBadgesProblem SolvingRubyRatingsSubmissionsUser has not solved any challenges yet.Contest HistoryUser has not participated in any contests yet.DiscussionsUser doesn't have any discussions yet.