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Re: Help requested
Joined: 03 May 2004
Posts: 8
Re: Help requested
> 1. Rename the file - Each file name has 3 constituents. The stock
> exchange ticker- this is unique to each stock, constant and never
> changes. The second part is the category the stock is placed in by the
> exchange - this doesnt change daily but can change any time(plus there
> 3 categories the stock exchnage uses). The third part is a numeric
> code assigned to each file by the broker`s java program sitting on my
> hard disk and changes daily. I want to remove the second and third
> parts, and assign the stock exchange ticker as the file name.
>
> An example of the file name is given below:
>
> AJANTPHARMEQ10458 - the name therefore consists of
>
> AJANTPHARM(ticker) + EQ(category code - this can be any of the 3 types
> the stock exchange uses) + 10458(numeric code assigned by the broker`s
> data feed).
(Warning: Code not tested)
Assuming that the filename is in $name, you can use
if($name =~ /^(.+)(EQ|2ndCode|3rdCode)(d+)$/)
{
# now $1 contains the ticker, $2 contains the category code
# and $3 contains the numeric code
...
}
else
{
# Filename in incorrect format
}
To rename the file, use the `rename` function of Perl.
>
> 2. After having completed the first task I want to then insert the
> ticker/symbol in the begining of each row in the file.
>
>
> The data in the file is in the following format:
>
> 20040607.100607, 95, 20000
> 20040607.100708, 94, 25000
The general strategy is:
- create a temporary file
- copy the original file to the temporary (row by row), inserting
the prefix to each row
- replace the original file with the temporary file
So you need the open, close and unlink functions. Reading a file is done
using the angle operator, writing using print. The Perl documentation
for
open, i.e.
perldoc -f open
gives an example of this usage.
Ronald
Joined: 08 Jun 2004
Posts: 2
Re: Help requested
Ronald,
Thanks very much for taking the trouble. Now that I have the pointers
I will get cracking on trying to work out the solution.
Regards
Rakesh
--- In perl_official@yahoogroups.com, <fischron.external@i...> wrote:
> > 1. Rename the file - Each file name has 3 constituents. The stock
> > exchange ticker- this is unique to each stock, constant and never
> > changes. The second part is the category the stock is placed in by the
> > exchange - this doesnt change daily but can change any time(plus there
> > 3 categories the stock exchnage uses). The third part is a numeric
> > code assigned to each file by the broker`s java program sitting on my
> > hard disk and changes daily. I want to remove the second and third
> > parts, and assign the stock exchange ticker as the file name.
> >
> > An example of the file name is given below:
> >
> > AJANTPHARMEQ10458 - the name therefore consists of
> >
> > AJANTPHARM(ticker) + EQ(category code - this can be any of the 3 types
> > the stock exchange uses) + 10458(numeric code assigned by the broker`s
> > data feed).
>
> (Warning: Code not tested)
>
> Assuming that the filename is in $name, you can use
>
> if($name =~ /^(.+)(EQ|2ndCode|3rdCode)(d+)$/)
> {
> # now $1 contains the ticker, $2 contains the category code
> # and $3 contains the numeric code
> ...
> }
> else
> {
> # Filename in incorrect format
> }
>
> To rename the file, use the `rename` function of Perl.
>
> >
> > 2. After having completed the first task I want to then insert the
> > ticker/symbol in the begining of each row in the file.
> >
> >
> > The data in the file is in the following format:
> >
> > 20040607.100607, 95, 20000
> > 20040607.100708, 94, 25000
>
> The general strategy is:
>
> - create a temporary file
> - copy the original file to the temporary (row by row), inserting
> the prefix to each row
> - replace the original file with the temporary file
>
> So you need the open, close and unlink functions. Reading a file is done
> using the angle operator, writing using print. The Perl documentation
> for
> open, i.e.
>
> perldoc -f open
>
> gives an example of this usage.
>
> Ronald
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