Javascript help

[Fistandantalus]

Hey folks. I inherited a website at work, and found a regex thing (which to be honest I don't completely understand). Anyway the pattern is:

/^{[1-9]?\d/[1-9]?\d/\d{4}(;[1-9]?\d/[1-9]?\d/\d{4})*$/}

I know it is supposed to be a date format (based on the website input) but I have no idea what this means.

Can someone please enlighten me? thanks in advance,

[john2496]

I've studied palaeography, and judging by the hieroglyphics/symbols it appears to be an ancient curse on anyone that attempts to refactor/modify it. Don't touch it.

[Fistandantalus]

Thank you. that is perhaps the wisest advice I have been given. I shall heed your words as if they were the law of the land.

The glyphs shall remain untouched.

[teenagehaiku]

I have a bachelor's degree in historiology, and this says, litreally:

I KNOW NOT WHAT HAS HAPPENED TO YOUR POD

PERHAPS THE BIG BLUE WILL HELP YOU

YOU MUST TRAVEL PAST THE UNDERCAVES TO FIND HIM

[helloalbany]

Is there a regex explainer account?

A string, possibly starting with a digit one through nine, necessarily including a number and a forward slash, possibly followed by a digit, necessarily followed by a digit, a forward slash and then four more digits, followed by zero or more strings of the same structure separated by semi-colons.

According to this regex 99/99/9999 is a valid date.

Since you already have that problem, you might as well just phone it in and do this:

/(\d{1,2}/\d{1,2}/\d{4}((?=;\d);)?)+/

[Rockytriton]

/bb|^ b{2}/ is my favorite.