Javascript String Manipulation getting part of a string

Question

I have a url like the following.

http:// myipaddress/folder1/folder2/themes/index.html

Does anyone know of the best approach to always grab whats before and not including /themes/ using javscript string manipulation reg exp techniques. The first bit will regularly be different to the /themes/index.html which is static

if you sure that "themes/index.html" is static, just replace it with empty string "http:// myipaddress/folder1/folder2/themes/index.html".replace("/themes/index.html", "") — Tommi
– Tommi, Commented Jul 7, 2014 at 13:28
@Tommi: that approach presupposes that what follows /themes is always known in advance, which may not be the case. — David Thomas
– David Thomas, Commented Jul 7, 2014 at 13:30

Avinash Raj · Accepted Answer · 2014-07-07 13:38:13Z

1

You could use lookahead to get all the texts before /themes,

> var str = 'http:// myipaddress/folder1/folder2/themes/index.html';
undefined
> var patt1 = /^.*(?=\/themes)/gi;
undefined
> var result = str.match(patt1);
undefined
> console.log(result);
[ 'http:// myipaddress/folder1/folder2' ]

edited Jul 7, 2014 at 13:38

answered Jul 7, 2014 at 13:33

Avinash Raj

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Narek Mamikonyan · Accepted Answer · 2014-07-07 13:51:52Z

0

you can use javascript split method and remove themes from strings array given by split method and then use join method to concatenate it with your delimeter ('/')

function removeFromStr(str,whatToRemove){
var splitted = str.split('/'),
    filtered = splitted.filter(function(el){
        return el !== whatToRemove;
    });
    return filtered.join('/');
}
test = removeFromStr('http://myipaddress/folder1/folder2/themes/index.html','themes');

console.log(test);

edited Jul 7, 2014 at 13:51

answered Jul 7, 2014 at 13:28

Narek Mamikonyan

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