10-10-2012
sort script
I have need of a sorting script that will sort a file of tab delimited data on multiple columns. I often do this kind of thing in excel, but I have need of something more automated. I guess the syntax would be something like, sort by columnName, then by otherColumnName, etc. There are allot of options for this sort of thing, such as the sort order (a-z, z-a), data types, etc, so I'm not sure where to begin. I know that the higher level interpreters like python have nice sort functions, but I don't know python really at all. I guess that for now I would hard code the sort criteria, but it also might be nice to eventually be able to pass that in, assuming that a reasonable syntax could be developed.
Any suggestions as to where to start with this?
LMHmedchem
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LEARN ABOUT DEBIAN
prima::detailedlist
Prima::DetailedList(3) User Contributed Perl Documentation Prima::DetailedList(3)
NAME
Prima::DetailedList - a multi-column list viewer with controlling header widget.
SYNOPSIS
use Prima::DetailedList;
my $l = $w-> insert( 'Prima::DetailedList',
columns => 2,
headers => [ 'Column 1', 'Column 2' ],
items => [
['Row 1, Col 1', 'Row 1, Col 2'],
['Row 2, Col 1', 'Row 2, Col 2']
],
);
$l-> sort(1);
DESCRIPTION
Prima::DetailedList is a descendant of Prima::ListViewer, and as such provides a certain level of abstraction. It overloads format of items
in order to support multi-column ( 2D ) cell span. It also inserts Prima::Header widget on top of the list, so the user can interactively
move, resize and sort the content of the list. The sorting mechanism is realized inside the package; it is activated by the mouse click on
a header tab.
Since the class inherits Prima::ListViewer, some functionality, like 'item search by key', or "get_item_text" method can not operate on 2D
lists. Therefore, mainColumn property is introduced, that selects the column representing all the data.
API
Events
Sort COLUMN, DIRECTION
Called inside sort method, to facilitate custom algorithms of sorting. If the callback procedure is willing to sort by COLUMN index,
then it must call "clear_event", to signal the event flow stop. The DIRECTION is a boolean flag, specifying whether the sorting must be
performed is ascending ( 1 ) or descending ( 0 ) order.
The callback procedure must operate on the internal storage of "{items}", which is an array of arrays of scalars.
The default action is the literal sorting algorithm, where precedence is arbitrated by "cmp" operator ( see "Equality Operators" in
perlop ) .
Properties
columns INTEGER
Governs the number of columns in items. If set-called, and the new number is different from the old number, both items and headers are
restructured.
Default value: 0
headerClass
Assigns a header class.
Create-only property.
Default value: "Prima::Header"
headerProfile HASH
Assigns hash of properties, passed to the header widget during the creation.
Create-only property.
headerDelegations ARRAY
Assigns a header widget list of delegated notifications.
Create-only property.
headers ARRAY
Array of strings, passed to the header widget as column titles.
items ARRAY
Array of arrays of scalars, of arbitrary kind. The default behavior, however, assumes that the scalars are strings. The data direction
is from left to right and from top to bottom.
mainColumn INTEGER
Selects the column, responsible for representation of all the data. As the user clicks the header tab, "mainColumn" is automatically
changed to the corresponding column.
Default value: 0
Methods
sort [ COLUMN ]
Sorts items by the COLUMN index in ascending order. If COLUMN is not specified, sorts by the last specified column, or by #0 if it is
the first "sort" invocation.
If COLUMN was specified, and the last specified column equals to COLUMN, the sort direction is reversed.
The method does not perform sorting itself, but invokes Sort notification, so the sorting algorithms can be overloaded, or be applied
differently to the columns.
AUTHOR
Dmitry Karasik, <dmitry@karasik.eu.org>.
SEE ALSO
Prima, Prima::Lists, Prima::Header, examples/sheet.pl
perl v5.14.2 2009-02-24 Prima::DetailedList(3)