将日期转换为时间戳 javascript

Question

I have got a date in this format: Tuesday, 31st October 2017 and tried to convert it with new Date(); but it didn't work.

Is there any simple way how to convert this date into a timestamp? I am not a developer but need quickly achieve this small task.

Thank you very much.

Answer 1

How about this? The last line will print out the timestamp. Since your date is not in a standard format, I parsed the string and built it in the correct format for Date.parse() to work.

var dateStr = "Tuesday, 31st October 2017";
dateStr = dateStr.replace(/.*, /, ''); //Remove leading weekday name
var arr = dateStr.split(' '); //Split into 3 parts
var dateNum = arr[0].replace(/st|nd|rd/, ''); //Strip non digits from day 
var finalDateStr = arr[1] + ' ' + dateNum + ' ' + arr[2];
var dt = Date.parse(finalDateStr);
console.log(dt); //timestamp

Answer 2

As @serjeii mentioned in the comment you can just get rid of the strings next to the day indicating which n-th day of the month you have there.

Here is a nice 1 liner solution for you:

Date("Tuesday, 31st October 2017".replace(/(\d+)(st|nd|rd|th)/, "$1"));

Of course, you can declare your date as a variable and then call the replace function.

var my_date = "Tuesday, 31st October 2017";
Date(my_date.replace(/(\d+)(st|nd|rd|th)/, "$1"));

You are welcome :)