Extract Part of URL JS

Question

How could I extract just the date part from the following string?

var string = "http://www.blah.co.uk/world/images/landing-pages/furniture/11-12-2015/furniture.jpg"

The "furniture.jpg" part will be variable length as well as the furniture department text before the date.

Thank you, D

string.lastIndexOf("/") or split("/") .. and move your way from there... — Petter Friberg
– Petter Friberg, Commented Nov 11, 2015 at 15:19

Farnabaz · Accepted Answer · 2015-11-11 15:22:52Z

2

String has a great function match, you can pass regex (regular expression) to it and this return matches in string

var string = "http://www.blah.co.uk/world/images/landing-pages/furniture/11-12-2015/furniture.jpg"
string.match(/\d{2}-\d{2}-\d{4}/) // out: ["11-12-2015"]

if you interest in regular expression look at MDN

edited Nov 11, 2015 at 15:22

answered Nov 11, 2015 at 15:20

Farnabaz

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4 Comments

online Thomas Over a year ago

I prefer this answer because it doesn't alway has to be in the same place of the url, just match the date format, nice

Liam Over a year ago

It's also less efficent than the substring @Thomas

scrayne Over a year ago

For something like this efficiency is a low priority.

online Thomas Over a year ago

@Liam I prefer security over some milliseconds performance gain

andrrs · Accepted Answer · 2015-11-11 15:19:10Z

1

Can you perhaps split by "/" and take the second to last?

var components = string.split("/");
var dateString = components[components.length - 2]

answered Nov 11, 2015 at 15:19

andrrs

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7 Comments

andrrs Over a year ago

@Liam Since the array is zero-indexed, components[components.length] would be out of the array and components[components.length - 1] would be "furniture.jpg"

Liam Over a year ago

Ignore me, brain not firing on all cylinders... this is the answer

Zac Braddy Over a year ago

Whilst this works, it relies on the string being in a certain structure. That may or may not be a problem depending the context of the problem @user1389646 is trying to solve. Personally, I would prefer not to couple my code the the structure of the URL in this way.

andrrs Over a year ago

But will it be possible at all to answer this question without making assumptions? Farnabaz solution is neat but again that assumes the url only has one date in it. Perhaps a safer assumption, perhaps not, but still an assumption.

Liam Over a year ago

But parsing strings is always coupled to a certain structure. Your answer @ZacBraddy is no different, it relies on data being a in a certain place in the string. If the the OP wants the second to last part of the URL then this does it and you could argue a RegEx is simply in-efficent/goldplating

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Zac Braddy · Accepted Answer · 2015-11-11 15:24:50Z

0

You could use this regex

var string = "http://www.blah.co.uk/world/images/landing-pages/furniture/11-12-2015/furniture.jpg";
var iWantThisDate = /[0-9]+-[0-9]+-[0-9]+/.exec(string);

That would get you just the date pattern out of the string and put it in iWantThisDate.

answered Nov 11, 2015 at 15:24

Zac Braddy

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