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!
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3come on ?! did you search before asking this kind of a question ?!Adidi– Adidi2013-03-22 21:13:19 +00:00Commented Mar 22, 2013 at 21:13
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var parts = URL.split("/"); alert(parts[parts.length-2]);mplungjan– mplungjan2013-03-22 21:13:29 +00:00Commented Mar 22, 2013 at 21:13
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7 Answers
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.
Comments
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);
2 Comments
adeneo
+1, that's actually pretty neat, and works with or without the trailing slash, and regardless of the last folders name. Was trying to think of a way to do this, but all I could come up with was just removing the last slash.
David Thomas
Yeah, that's why I threw the
replace() and trim() in there; it just feels a little icky (for some unknown reason, but seeing the length - 2 in the alternatives felt just as bad); but thank you! =DYou can use the split function to retrieve all subpaths:
var path = '/folder1/folder2/folder3/';
var paths = path.split('/');
var pathNeeded = paths[paths.length - 2];
1 Comment
Marcus Vinicius
While I was typing in the jsFiddle.
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]);
Comments
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
Comments
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
1 Comment
Micka
@mplungjan True, i didn't realized when I saw the post in first place. A check should be done here, to see if there is a slash or not, so he can use substr on this one. The answer of DavidThomas is actually the best.
