Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] \p{N} 2nd 3rd 4th 5th 6th \N{ name } ${name} ${name~) \N{name} inhibiting 2nd named capture .NET mimicking numeric names PHP 2nd 3rd with unnamed capture naughty variables OK for debugging \p{Nd} 2nd 3rd 4th 5th 6th 7th 8th 9th negated class and lazy quantifiers introduced Tcl NEL 2nd 3rd nervous system nested constructs .NET Perl 2nd PHP 2nd $NestedStuffRegex 2nd 3rd 4th $$ .NET neurophysiologists early regex study neverending match 2nd 3rd avoiding discovery explanation non-determinism short-circuiting solving with atomic grouping solving with possessive quantifiers New Regex 2nd 3rd 4th newline and HTTP NEXT LINE 2nd 3rd NextMatch (Match object method) NFA acronym spelled out and alternation and greediness compared with DFA 2nd control benefits efficiency first introduced freeflowing regex implementation ease introduction nondeterminism checkpoint POSIX efficiency testing for theory \p{Nl} 2nd 3rd \p{No} 2nd 3rd No Dashes Hall Of Shame no re 'debug' no_match_vars nomenclature non-capturing parentheses 2nd \p{Non_Spacing_Mark} 2nd 3rd None (.NET) nonillion nonparticipation parentheses 2nd 3rd nonregular sets "normal" NUL with dot NULL \p{Number} 2nd 3rd |