。
这个错误是因为在JavaScript中,字符串类型的变量没有match()方法。match()方法是用于在字符串中查找匹配的子串,并返回一个数组或者null。
要将持续时间从"2h 3min"字符串转换为数字,可以使用正则表达式和字符串的替换方法来提取出小时和分钟,并进行计算。
以下是一个可能的解决方案:
var stringtime = "2h 3min";
var hours = parseInt(stringtime.replace(/(\d+)h (\d+)min/, "$1"));
var minutes = parseInt(stringtime.replace(/(\d+)h (\d+)min/, "$2"));
var totalMinutes = hours * 60 + minutes;
console.log(totalMinutes); // 输出123
在上面的代码中,我们使用正则表达式/(\d+)h (\d+)min/
来匹配字符串中的小时和分钟部分。然后使用replace()方法将匹配到的小时和分钟替换为空字符串,得到纯数字的小时和分钟。最后,将小时转换为分钟并与分钟相加,得到总的分钟数。
这是一个简单的示例,实际应用中可能需要添加更多的错误处理和边界情况的判断。
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