11-25-2011
Well if its alright then I may as well as them. I'm curently working through the same worksheet only I have moved onto advanced grep, and there are two questions in it that have me puzzled. Here they are.
Quote:
j) Find out which models of car do NOT contain a digit within their name. Where (line position) within the file are the cars which do have digits within their model name?
m) Find any car model names which include “ee”, without explicitly including “ee”
within your search pattern. Hint: Use curly { } brackets
n) Find out all car models beginning with “B”, and redirect these to a file called
“alpha-carslist.txt”. Append to this file, all car models beginning with “C”. How
many records are in the above file? (Hint: use the “wc -l” command)
And just to show you the layout of how the car list looks like, here are the first few lines, not all of them just in case it seems like too much.
Quote:
Ford:Mondeo:1997:Blue:5
Vauxhall:Vectra:1999:White:2
Seat:Ibiza:1996:Red:4
Peugeot:406:1999:Silver:1
McLaren:F1:1997:Black:2
Skoda:Octavia:2003:Silver:2
Peugeot:206:2000:Red:1
Even with the hints for m & n I'm still having trouble with what comands I should be using, all I know is that I have been using a format such as this for the most recent questions and answers.
Quote:
cat carslist.txt | grep '.*:.*:.*:.*:.*$'
or something similar anyway. Some more help on these would be greatfully appreciated. =-)
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LEARN ABOUT DEBIAN
gnome2::gconf::value
Gnome2::GConf::Value(3pm) User Contributed Perl Documentation Gnome2::GConf::Value(3pm)
NAME
Gnome2::GConf::Value - Opaque datatype for generic values
SYNOPSIS
$client = Gnome2::GConf::Client->get_default;
$client->set($config_key,
{
type => 'string',
value => 'Hello, World',
});
print "The Meaning of Life." if ($client->get($another_key)->{value} == 42);
DESCRIPTION
"GConfValue" is a dynamic type similar to "GValue", and represents a value that can be obtained from or stored in the configuration
database; it contains the value bound to a key, and its type.
In perl, it's an hashref containing these keys:
type
The type of the data. Fundamental types are 'string', 'int', 'float' and 'bool'. Lists are handled by passing an arrayref as the
payload of the "value" key:
$client->set($key, { type => 'string', value => 'some string' });
$client->set($key, { type => 'float', value => 0.5 });
$client->set($key, { type => 'bool', value => FALSE });
$client->set($key, { type => 'int', value => [0..15] });
Pairs are handled by using the special type 'pair', and passing, in place of the "value" key, the "car" and the "cdr" keys, each
containing an hashref representing a GConfValue:
$client->set($key, {
type => 'pair',
car => { type => 'string', value => 'some string' },
cdr => { type => 'int', value => 42 },
});
This is needed since pairs might have different types; lists, instead, are of the same type.
value
The payload, containing the value of type "type". It is used only for fundamental types (scalars or lists).
car, cdr
Special keys, that must be used only when working with the 'pair' type.
SEE ALSO
Gnome2::GConf(3pm), Gnome2::GConf::Entry(3pm), Gnome2::GConf::Schema(3pm), Gnome2::GConf::ChangeSet(3pm).
METHODS
integer = $value_a->compare ($value_b)
o $value_b (value)
Since: gconf 2.13
string = $value->to_string
SEE ALSO
Gnome2::GConf
COPYRIGHT
Copyright (C) 2003-2006 by the gtk2-perl team.
This software is licensed under the LGPL. See Gnome2::GConf for a full notice.
perl v5.14.2 2011-11-17 Gnome2::GConf::Value(3pm)