获取括号之间的最后一个匹配

function getLastMatchingBracket(str) {
  const stack = [];
  let lastMatchingIndex = -1;

  for (let i = 0; i < str.length; i++) {
    if (str[i] === '(') {
      stack.push(i);
    } else if (str[i] === ')') {
      if (stack.length > 0) {
        lastMatchingIndex = stack.pop();
      }
    }
  }

  return lastMatchingIndex;
}

// 示例用法
const inputString = 'abc(def(ghi)jkl)mno(pqr)';
const lastMatchingIndex = getLastMatchingBracket(inputString);
console.log(lastMatchingIndex); // 输出结果：12