CODEWITHSUNDEEP
javascriptstringparsing
stingray-11
stingray-11

Reputation: 448

javascript finding part of a string

I'm not very used to Javascript so I'm having trouble manipulating strings...

If I have something like /folder1/folder2/folder3/ , how do I parse it so I end up with just the current folder, e.g. "folder3" ?

Thanks!

Upvotes: 2

Views: 131

Answers (7)

Vivin Paliath
Vivin Paliath

Reputation: 95518

var folderName = str.match(/(folder\d+)\/$/)[1];

Should do it.

Explanation of the regex:

(      -> Start of capture group. We want a capture group because we just want 
          the folder name without the trailing slash.           
folder -> Match the string "folder"
\d+    -> Match one or more digits
)      -> End of capture group. This lets us capture strings of the form 
          "folderN", where N is a number.              
\/     -> Escape forward slash. We have to escape this because / is used to 
          represent the start and end of a regex literal, in Javascript.              
$      -> Match the end of the string.

The reason we are selecting the second element of the array (at index 1) is because the first element contains the complete string that was matched. This is not what we want; we just want the capture group. We only have one group that we captured, and so that is the second element.

Upvotes: 3

David Thomas
David Thomas

Reputation: 253318

Well, just because it's an option (though not necessarily sane):

var string = '/folder1/folder2/folder3/',
    last = string.replace(/\//g,' ').trim().split(/\s/).pop();
    console.log(last);

JS Fiddle demo.

Upvotes: 2

Micka
Micka

Reputation: 1834

You can write the following:

var myString = '/fold1/fold2/fold3';
var myArray = myString.split('/');
var last_element = myArray[myArray.length - 1];

See the doc split

Upvotes: 0

lostsource
lostsource

Reputation: 21830

The split function transform your string into an array using the supplied parameter as a delimiter.

Therefore:

var parts = "/folder1/folder2/folder3/".split("/");

Will result in parts being equal to:

["", "folder1", "folder2", "folder3", ""]

You could then access each item using:

parts[0] // returns ''
parts[1] // returns 'folder1'
parts[2] // returns 'folder2'

.. and so on. Read more on split here:

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/split

Upvotes: 1

adeneo
adeneo

Reputation: 318212

var str    = "/folder1/folder2/folder3/",
    folder = str.substring(0, str.length - 1).split('/').pop();

FIDDLE

Upvotes: 1

Marcus Vinicius
Marcus Vinicius

Reputation: 1908

You can use the split function to retrieve all subpaths:

var path = '/folder1/folder2/folder3/';
var paths = path.split('/');
var pathNeeded = paths[paths.length - 2];

Working example

Upvotes: 1

mplungjan
mplungjan

Reputation: 177956

How stable is the format of that string? With a trailing slash you will need the next to last item

var parts = URL.split("/"); alert(parts[parts.length-2]);

Upvotes: 1

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