Alex Goor wrote:
> i have a data set of stock orders and i want to count the number of
unique
> stock symbols in the set.
>
> i have turned the data set into an array and based on the message spec,
i
> can identify the stock symbols. but i don't know how to make sure i'm
only
> counting unique ones.
Use a hash. Hash keys are always unique.
> i had thought to do an if statement along the lines of
>
>
> $symbolset = "@[EMAIL PROTECTED]
";
> if $symbolset !~ /substr($message,17,6)/ #if the array doesn't contain
^^^^^^^
You can't execute a function inside a string.
perldoc -q "How do I expand function calls in a string"
> the new symbol
> {
> #then add it to the array
> push (@[EMAIL PROTECTED]
"substr($message,17,6)
>
> }
my %symbolset;
# more code here
# increment count of unique data
$symbolset{ substr $message, 17, 6 }++;
John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall
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