JS逆波兰化
var operators = {'=': 4, '+': 3, '-': 3, '*': 2, '/': 2, '%': 2, '(': 1, ')': 1}; function reversePolish(tokens) { var result = [], stack = []; tokens = tokens.slice().reverse(); while (tokens.length) { var next = tokens.pop(); if (!operators[next]) { result.push(next); } else if (next === '(') {...