Can't get a substr() or substring() of a passed in variable

[Daniel Reardon]

All,

I'm sure that this is an old question, but I'm having problems getting
a substring of a passed in variable. I can do other string
manipulation with it such as concatonation, but I'm really trying to
get everything after the = assigned to the id variable (i.e. set MSFT
to the id variable). Any help would be appreciated it.
'ticker' variable passed in is =
'http://caps.fool.com/Ticker.aspx?source=icaedilnk9950012&ticker=MSFT''

The first alert(ticker) work perfect and returns the entire string
above.

####Non-Working
Example####_______________________________________ _________
function enhanceTickerLinks(ticker)
{
alert(ticker)
var id
id = ticker.substr(5)
alert(id)

[David Golightly]

Daniel Reardon wrote:

All,

I'm sure that this is an old question, but I'm having problems getting
a substring of a passed in variable. I can do other string
manipulation with it such as concatonation, but I'm really trying to
get everything after the = assigned to the id variable (i.e. set MSFT
to the id variable). Any help would be appreciated it.
'ticker' variable passed in is =
'http://caps.fool.com/Ticker.aspx?source=icaedilnk9950012&ticker=MSFT''

The first alert(ticker) work perfect and returns the entire string
above.

####Non-Working
Example####_______________________________________ _________
function enhanceTickerLinks(ticker)
{
alert(ticker)
var id
id = ticker.substr(5)
alert(id)

That's because the parameter you're using is wrong.

String.substr(start, length)

if argument length is missing, it's assumed to be the length of the
string

Firefox accepts negative indices to read from the end of the string,
but IE isn't that advanced. You have to specify:

var ticker = 'http://caps.fool.com?ticker=MSFT';
var len = ticker.length;
var id = ticker.substr(len-4,len);

if you want it to work for you.

There's a ton of documentation on basic methods like this. I suggest
for the future you look this sort of thing up at w3schools.com or in a
good reference like the O'Reilly guide before bringing your question
here - it'll save everybody a lot of time.

[Richard Cornford]

David Golightly wrote:

Daniel Reardon wrote:

>I'm sure that this is an old question, but I'm having
problems getting a substring of a passed in variable.
I can do other string manipulation with it such as
concatonation, but I'm really trying to get everything
after the = assigned to the id variable (i.e. set MSFT
to the id variable). Any help would be appreciated it.
'ticker' variable passed in is =

'http://caps.fool.com/Ticker.aspx?source=icaedilnk9950012&ticker=MSFT''

>>
The first alert(ticker) work perfect and returns the entire
string above.

####Non-Working
Example####______________________________________ __________
function enhanceTickerLinks(ticker)
{
alert(ticker)
var id
id = ticker.substr(5)
alert(id)

That's because the parameter you're using is wrong.

String.substr(start, length)

if argument length is missing, it's assumed to be the
length of the string

The second argument to - substr - is optional.

Firefox accepts negative indices to read from the end of
the string, but IE isn't that advanced.

<snip>

IE does not appear to have any problems with - substr - only being given
one argument.

The most likely explanation here is that the question as asked is
substantially misleading and rather than being passed a string as its
argument the function is being passed a reference to the - location -
object, which does have a - toString - method (so will show the URL text
with - alert(location) - and may be concatenated to strings using the -
+ - operator) but dos not have - substring - or substr - methods.

Richard.