kwd variable holds this value: news path:".aspx" It is basically the query string of an url.
var path= "path:\".aspx\"";
so kwd= whatever user types passed to the url like this+path:
kwd=news path:".aspx";
I need to subtract kwd-path so i get only "news" How do i do that in java-script or jquery?
I know i can either use trim or substring or substr.. But I couldn't get to work . I am basically using this logic:
if (b.startsWith(a)) {
return b.subString(a.length());
}
if (b.endsWith(a)) {
return b.subString(0, b.length() - a.length());
}
But this is not working..
var persistvalue= kwd.subString(0, kwd.length() - path.length());
kwd.length() - path.length()
- isn't this value negative?
try path.length() - kwd.length()
Since your .aspx
is inside a string, you must first extract it from the string:
>>> 'an example:"some text"'.match(/"(.*)"/)[1]
"some text"
Now you can remove a string if it appears at the end:
function removeFromEnd(string, toRemove) {
function literally(regexp) {
regexp.replace(/./g, function(x){return '\\'+x})
}
yourString.replace(RegExp(literally(string)+'$'), '')
}
The $
means the end-of-string. Alternatively you can do it much more simply with:
function removeFromEnd(string, toRemove) {
if (string.slice(-toRemove.length)==toRemove)
return string.slice(0, -toRemove.length);
else
return string
}