code: function transformNumberToArray(newValue) {
      newValue = newValue.trim();
      const wordArray = newValue.split(' ');
      const number = wordArray[wordArray.length - 1];
      const arr = [];
  
      if (/^\d+$/.test(number)) {
          for (let i = 1; i < +number + 1; i++) {
              arr.push(i);
          }
          newValue = newValue.replace(number, `[${arr}]`);
      }
  
      return newValue;
  }
docs: 转化数字为数组，以支持for="item in 5"语法
  
  @param {string} newValue 待转化的字符串
  @return {string} 被转化后的数组字符串