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!
--
roN
www.rideon.ch

[Justin Koivisto]

Ron Eggler wrote:

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);

--
Justin Koivisto - ju****@koivi.com
http://koivi.com

[Lasse Reichstein Nielsen]

"Ron Eggler" <NO****@hotmail.com> writes:

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
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html>
'Faith without judgement merely degrades the spirit divine.'

[Grant Wagner]

--
Grant Wagner <gw*****@agricoreunited.com>
comp.lang.javascript FAQ - http://jibbering.com/faq
"Ron Eggler" <NO****@hotmail.com> wrote in message
news:3f************@individual.net...

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 />.

--
Grant Wagner <gw*****@agricoreunited.com>
comp.lang.javascript FAQ - http://jibbering.com/faq

[Evertjan.]

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

"Ron Eggler" <NO****@hotmail.com> writes:

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')
}

--
Evertjan.
The Netherlands.
(Replace all crosses with dots in my emailaddress)

[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.

--
zaj gezunt!
tomasz cenian tcenian at wa dot home dot pl
:::: :: : : http://cenian.boo.pl : : :: ::::

[Kristian Thy]

Quoth 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.

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

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

--
\\kristian

[Tomasz Cenian]

Kristian Thy napisał(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"?

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.

--
zaj gezunt!
tomasz cenian tcenian at wa dot home dot pl
:::: :: : : http://cenian.boo.pl : : :: ::::

[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.

--
\\kristian

[Dr John Stockton]

JRS: In article <3f************@individual.net>, dated Wed, 18 May 2005
22:02:08, seen in news:comp.lang.javascript, Ron Eggler
<NO****@hotmail.com> posted :

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.

--
© John Stockton, Surrey, UK. ?@merlyn.demon.co.uk Turnpike v4.00 IE 4 ©
<URL:http://www.jibbering.com/faq/> JL/RC: FAQ of news:comp.lang.javascript
<URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

[Lasse Reichstein Nielsen]

Tomasz Cenian <aa*@bb.cc.dd> writes:

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
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html>
'Faith without judgement merely degrades the spirit divine.'

[RobG]

Lasse Reichstein Nielsen wrote:

"Ron Eggler" <NO****@hotmail.com> writes:

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);

--
Rob

[Lasse Reichstein Nielsen]

RobG <rg***@iinet.net.auau> writes:

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

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

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html>
'Faith without judgement merely degrades the spirit divine.'

[Mick White]

Ron Eggler wrote:

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]

Tomasz Cenian wrote:

Kristian Thy napisa?(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"?

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