Index – U

uc ucfirst UDP datagram exchange umask uname (POSIX) unary operator undef, [1] as unknown truthiness undefined Unicode character names command-line switch decode, process, encode I/O in regular expressions pitfalls round-trip script preamble Unicode property, [1] compound form general category portability script vs block Unicode script matching Unicode::Collate not available Unicode::Collate::CJK::Big5 Unicode::Collate::CJK::GB2312 Unicode::Collate::CJK::JISX0208 Unicode::Collate::CJK::Korean Unicode::Collate::CJK::Pinyin Unicode::Collate::CJK::Stroke Unicode::Collate::CJK::Zhuyin Unicode::Collate::Locale Unicode::GCString Unicode::LineBreak pperl 0.6.21 Unicode::LineBreak::SouthEastAsian Unicode::Normalize, [1] pperl 0.6.21 Unicode::Normalize::splitOnLastStarter Unicode::UCD unicode_strings uniform uniform buffer alignment updating union (Peta::FFI) uniq (List::Util) uniqint (List::Util) uniqnum (List::Util) uniqstr (List::Util) UNIVERSAL UNIVERSAL::can UNIVERSAL::isa UNIX-domain socket unless, [1], [2] rewriting as if unlink unlock_keys (Hash::Util) unlock_ref_keys (Hash::Util) unlock_value (Hash::Util) unmap (File::Map) unmemoize (Memoize) unpack %32b* / directive binary serialisation bulk transfer checksum computed template H* template in stages unpack_ptr (Peta::FFI)

unpack_sockaddr_in6 (Socket) unpack_sockaddr_in (Socket) unpack_sockaddr_un (Socket) unpairs (List::Util) unrolling the loop unset Tcl unsharp mask UNSHIFT unshift reversing lines unshift (DB_File) UNTIE untie until, [1], [2] unwrapping upd_data (PDL) upvalue upvar URI::Escape URL encoding URL::Encode URL::Encode::XS use compile time, [1], [2], [3] import list use constant debug flag, [1] use integer pperl 0.6.13 use locale use open, [1] use re pperl 0.6.6 use re '/u' use re 'eval' use re 'strict', [1] use utf8 non-ASCII source vs I/O layers use v5.12 Unicode semantics use v5.36 strict and warnings used_buckets (Hash::Util) useithreads user-defined property User::grent User::pwent usort utf8 (pragma) utf8:: UTF-8, [1] UTF-8 flag and matching utime UV coordinate UV seam