String-functions?

[Ron Eggler]

Hi,

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?
Thank you!

 

[Justin Koivisto]

Hi,

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?
Thank you!

var s = 'http://server/dir1/dir2/dir3/';
s = s.match(/\/\/([^\/]*)\//);
s = s[1];
alert(s);

 

[Lasse Reichstein Nielsen]

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?

Sounds like a job for regular expressions:

function extractDomain(url) {
var match = /\/\/([^\/]*)\//.exec(url); // regexp //([^/])*/
if (match) { return match[1]; }
}

/L

 

[Grant Wagner]

--
Grant Wagner <[email protected]>
comp.lang.javascript FAQ - http://jibbering.com/faq

Hi,

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single
'/'?

<script type="text/javascript">
var s = 'http://server/dir1/dir2/dir3/';
var start = s.indexOf('//');
var end = s.lastIndexOf('/');
alert(s.substring(start + 2, end));
</script>

This will fail in most interesting ways if there are no slashes in the
string (or only two - http://).

You can also use regular expressions to extract the information you
seek.

And if the url is actually in the location object, then you can extract
the information using location.host and location.pathname <url:
http://docs.sun.com/source/816-6408-10/location.htm />.

 

[Evertjan.]

Lasse Reichstein Nielsen wrote on 18 mei 2005 in comp.lang.javascript:

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single
'/'?

Sounds like a job for regular expressions:

function extractDomain(url) {
var match = /\/\/([^\/]*)\//.exec(url); // regexp //([^/])*/
if (match) { return match[1]; }

return '';

}

you would want a string returned if there is no match.

=================

or:

function extractDomain(url) {
return /^http:\/\/([^\/]*)\/.*$/i.replace(url,'$1')
}

 

[Tomasz Cenian]

Ron Eggler napisa³(a):

Hi,

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?
Thank you!

You absolutely dont need (and shouldnt use) regular expressions.


$d = $string.split('/')[2]

will do the trick.

 

[Kristian Thy]

Quoth Tomasz Cenian:

Ron Eggler napisa³(a):

You absolutely dont need (and shouldnt use) regular expressions.

^^^^^^^^^^^^^^^^

I agree on the "don't need", but what's with the "shouldn't use"?

 

[Tomasz Cenian]

Kristian Thy napisał(a):

^^^^^^^^^^^^^^^^

I agree on the "don't need", but what's with the "shouldn't use"?

regexps are huge and very powerful tools. I believe that if the use of
them in a particular case is not necessary (like this one) they should
not be used. This is a general programming rule. You should always use
the most efficient and straightforward method to achieve the desired thing.

 

[Kristian Thy]

Quoth Tomasz Cenian:

regexps are huge and very powerful tools. I believe that if the use of
them in a particular case is not necessary (like this one) they should
not be used. This is a general programming rule. You should always use
the most efficient and straightforward method to achieve the desired thing.

Ah, okay

I thought you meant you shouldn't use regexps generally.

 

[Dr John Stockton]

JRS: In article <[email protected]>, dated Wed, 18 May 2005
22:02:08, seen in Ron Eggler

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?

If you are sure that there are no slashes before the //, then

S = S.split('/')[2]

will do it, except if there are browsers that won't return an empty
string for S[1] - in which case consider

S = S.split(/\/+/)[1]

which assumes that the field you want is not empty.

 

[Lasse Reichstein Nielsen]

You absolutely dont need (and shouldnt use) regular expressions.

$d = $string.split('/')[2]

will do the trick.

Only if the string has the correct format. There is no check for this.

It will still do too much work, since creating the other substrings is
not necessary.

var i1 = string.indexOf("//") + 2;
var i2 = string.indexOf("/", i1);
return string.substring(i1,i2);

/L

 

[RobG]

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?

Sounds like a job for regular expressions:

function extractDomain(url) {
var match = /\/\/([^\/]*)\//.exec(url); // regexp //([^/])*/
if (match) { return match[1]; }
}

Cool, but allowing for Mozilla-style - file:///usr/...
and IE-style - file://c:\...
and putting in the colon ':' for added safety, how about:

var match = /:\/{2,3}([^\/|\\]*)(\/|\\)/.exec(url);

 

[Lasse Reichstein Nielsen]

Cool, but allowing for Mozilla-style - file:///usr/...

That's not just Mozilla-style. It's the official shorthand for
file://localhost/usr/...

/L

 

[Mick White]

Hi,

if I got a String like: http://server/dir1/dir2/dir3/
how would i extract everything between '//' and the most left single '/'?
Thank you!

You're looking for "server"?

Str=Str.split("//")[1].split("/")[0];

But if this a location object, there are several built-in properties.
Mick

 

[Thomas 'PointedEars' Lahn]

Kristian Thy napisa?(a):

regexps are huge and very powerful tools. I believe that if the use of
them in a particular case is not necessary (like this one) they should
not be used. This is a general programming rule. You should always use
the most efficient and straightforward method to achieve the desired
thing.

You seldom know the length of the string to be parsed and so regular
expressions are in most cases the most efficient and straightforward
method.


PointedEars