느리지만 꾸준히 하는 나는 거부기

참고링크 : https://262.ecma-international.org/7.0/#sec-unary-plus-operator ECMAScript® 2016 Language Specification 5.1.1Context-Free Grammars# A context-free grammar consists of a number of productions. Each production has an abstract symbol called a nonterminal as its left-hand side, and a sequence of zero or more nonterminal and terminal symbols as its right-hand sid 262.ecma-international.org 신기한..