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
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;
}