01-29-2007
put date and time in file name
no that did not work. only the HHMM appeared in the file name,
I used
DTSTAMP=$(date "+%Y%m%d")
HMSTAMP=$(date "+%H%M")
cp /fdb/prod/fdbadm/data/nassst115d01.txt /fdb/prod/fdbadm/data/nass/FacilityMaster_$DTSTAMP_$HMSTAMP.dat
file name came out to be FacilityMaster_0732.dat - time only
i then reversed the order and had the time before the date, and then only the date appeared, but not the time.
DTSTAMP=$(date "+%Y%m%d")
HMSTAMP=$(date "+%H%M")
cp /fdb/prod/fdbadm/data/nassst115d01.txt /fdb/prod/fdbadm/data/nass/FacilityMaster_$HMSTAMP_$DTSTAMP.dat
file name became FacilityMaster_20070129.dat
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LEARN ABOUT DEBIAN
cache::historical
Historical(3pm) User Contributed Perl Documentation Historical(3pm)
NAME
Cache::Historical - Cache historical values
SYNOPSIS
use Cache::Historical;
my $cache = Cache::Historical->new();
# Set a key's value on a specific date
$cache->set( $dt, $key, $value );
# Get a key's value on a specific date
my $value = $cache->get( $dt, $key );
# Same as 'get', but if we don't have a value at $dt, but we
# do have values for dates < $dt, return the previous
# historic value.
$cache->get_interpolated( $dt, $key );
DESCRIPTION
Cache::Historical caches historical values by key and date. If you have something like historical stock quotes, for example
2008-01-02 msft 35.22
2008-01-03 msft 35.37
2008-01-04 msft 34.38
2008-01-07 msft 34.61
then you can store them in Cache::Historical like
my $cache = Cache::Historical->new();
my $fmt = DateTime::Format::Strptime->new(
pattern => "%Y-%m-%d");
$cache->set( $fmt->parse_datetime("2008-01-02"), "msft", 35.22 );
$cache->set( $fmt->parse_datetime("2008-01-03"), "msft", 35.37 );
$cache->set( $fmt->parse_datetime("2008-01-04"), "msft", 34.38 );
$cache->set( $fmt->parse_datetime("2008-01-07"), "msft", 34.61 );
and retrieve them later by date:
my $dt = $fmt->parse_datetime("2008-01-03");
# Returns 35.37
my $value = $cache->get( $dt, "msft" );
Even if there's no value available for a given date, but there are historical values that predate the requested date, "get_interpolated()"
will return the next best historical value:
my $dt = $fmt->parse_datetime("2008-01-06");
# Returns undef, no value available for 2008-01-06
my $value = $cache->get( $dt, "msft" );
# Returns 34.48, the value for 2008-01-04, instead.
$value = $cache->get_interpolated( $dt, "msft" );
Methods
new()
Creates the object. Takes the SQLite file to put the date into as an additional parameter:
my $cache = Cache::Historical->new(
sqlite_file => "/tmp/mydata.dat",
);
The SQLite file defaults to
$HOME/.cache-historical/cache-historical.dat
so if you have multiple caches, you need to use different SQLite files.
time_range()
# List the time range for which we have values for $key
my($from, $to) = $cache->time_range( $key );
keys()
# List all keys
my @keys = $cache->keys();
values()
# List all the values we have for $key, sorted by date
# ([$dt, $value], [$dt, $value], ...)
my @results = $cache->values( $key );
clear()
# Remove all values for a specific key
$cache->clear( $key );
# Clear the entire cache
$cache->clear();
last_update()
# Return a DateTime object of the last update of a given key
my $when = $cache->last_update( $key );
since_last_update()
# Return a DateTime::Duration object since the time of the last
# update of a given key.
my $since = $cache->since_last_update( $key );
LEGALESE
Copyright 2007-2011 by Mike Schilli, all rights reserved. This program is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
AUTHOR
2007, Mike Schilli <cpan@perlmeister.com>
perl v5.10.1 2011-04-27 Historical(3pm)