Rex, in you r previous mail, we explicity need to give
$str = 'd=4' ; .................It is simple to give it here as I know the
key=value pair for d i.e.. d=4. But I want to use function with very large
lists, and I have to search my list for the key only i.e.. "d".
thus, what I need is :
$c = some_func(@list, "d"); .............where some_func should return
me 3......... Can anybody help me.
Please suggest me.
Regards,
Mini.
"Rex Arul" <[EMAIL PROTECTED]> on 10/03/2001 06:02:30 PM
To: "Sudarsan Raghavan" <[EMAIL PROTECTED]>, Mini Dwivedi/HSS@HSS
cc: [EMAIL PROTECTED]
Subject: Re: index of an array element
But that would work only for key=value type of situations.
If @list = (2,'a',100,'cat')
then you cannot rely on Hashes because order cannot be preserved. At such
instances, you might need to code a custom function as shown in my previous
mail.
Right?
-- Rex
----- Original Message -----
From: "Sudarsan Raghavan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Wednesday, October 03, 2001 8:18 AM
Subject: Re: index of an array element
> [EMAIL PROTECTED] wrote:
>
> > Hi ,
> >
> > Say I have an array in perl,
> >
> > @list = ("a=3", "b=5", "c=8", "d=9", "e=2", "f=0");
>
> looking at your list a hash seems like a better option, the hash will
be like
>
> %hashlist = (
> a => 3,
> b => 5,
> c => 8,
> d => 9,
> e => 2,
> f => 0);
> the reason being, you are associating the numeric values (3, 5, 8
etc.) to the
> characters (a, b, c etc.)
> a hash (associative array) would be more useful here. Is my assumption
correct?
>
> To access the element 'd' you will say $hashlist{d}
> You can get more information on hashes from perldoc perldata
>
> >
> >
> > Now I want to find the index of the element "d=9" ( Index of d=9 is 3
here , as
> > we all know ).
> >
> > How do we do that ??
> >
> > In perl what I can find that there exist a function "index", which
returns
> > position of the substring in string..........like,
> >
> > $c = index(@list, "d" );
>
> >
> >
> > This function will return me the value 13 or 12 perhaps....as the
substring
> > "d=9" begins from 13th position in the @list.
> >
> > My requirment is :
> >
> > $c = some_func(@list, "d"); .............where some_func should return
me
> > 3......... Can anybody help me.
> >
> > TIA,
> > -Mini.
> >
> > --
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>
>
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