SHOWTABLE(1) User Contributed Perl Documentation SHOWTABLE(1)NAMEshowtable - Show data in nicely formatted columns
USAGEshowtable [-options] [file]
Showtable reads an input data stream and displays it in a nicely
formatted listing, with exact formatting depending upon the options.
The input stream, file or "STDIN" by default should consist of data
separated by tabs or the defined separator character (see -d).
The actual output formatting is peformed by the ShowTable module.
There are two general sets of options: those which help determine the
format of the input, and those which determine the format of the
Options affecting input
Set the inter-column break string to "str". The default is a
tab (""\t""). If -strip is also given, blanks surrounding
the break string will also be ignored.
-dstr This is the same as "-break="str.
Do not ignore lines of separators, such as dashes, equal
signs, or underlines. If -nodashes is given, and these lines
do occur in the stream, they will be treated as normal data.
Treat the first NN rows of data as column titles; multiple
words in the column titles may wrap vertically. If NN is
omitted, it defaults to 1. No -titles option is the same as
Set the input type as type, which can be one of: box, list,
table, or simple. A simple-type table is the same as a
table-type, but no wrapping characters are recognized.
-s(trip) Strip blanks from around the column values.
Do not strip blanks from the input. Useful if there is
formatted or aligned data within a boxed table.
Options affecting output
-t(able) Use a table format for output, with wrapping of column values
longer than the given or determined column widths. See
ShowTable for more details.
-si(mple) Use a simple table format, without any wrapping of column
values. See ShowTable for more details.
-l(ist) Use a list style format. See ShowTable for more details.
-b(ox) Use a "boxed" style table. See ShowTable for more details.
-ht(ml) Use HTML-formating. See ShowTable for more details.
Define the column names explicitly. This is useful for
naming columns of data from "STDIN", when showtable is being
used as a filter. The first column name, name1, cannot begin
with a digit. This option allows any column titles obtained
from the input to be overridden.
Do not output any headers on the tables; -titles=0 implies
-fn1[,n2, ..., nN]
Select fields numbered n1, n2, etc., to display. Each nN is
a field index, or a range of indexes in the form: "N"-"M" The
default is to show all the fields in each row. Fields are
numbered from 1. An example: to show the first, and three
through five fields of the "/etc/passwd" file:
showtable -d: -f1,2-5 /etc/passwd
-fields=fname1[,fname2, ..., fnameN]
Select the named fields to display. The field names must be
available, either through the data stream, or by using the
-titles option. The field names given must match the
existing field names exactly.
Using the file "/etc/passwd" for another example: to show the
same first two fields, by name:
showtable -d: -titles=Login,UID -fields=Login,UID /etc/passwd
Set the maximum table width. This value is applied to the
variable Data::Showtable::Max_Table_Width. When the total
width of all columns to be displayed exceeds this value, all
column widths are scaled uniformly.
If -width is not given, then for all output but -html, the
default value is either ""COLUMNS"", if defined, or 80, if
not. Whith -html mode, there is no default value for -width;
in other words, there is no limit to the width.
Set individual column widths to the specified values. Empty
column widths imply no maximum width. If the -width option
is also given, then the -cwidth column widths can also be
given as fractions or percentages.
Example: To set the maximum width of the third column to 20
HTML-only options (the usage of which implies -html)
Do not perform HTML escape sequences on the data; this allows
embedded HTML text in the data to be displayed properly with
the -html option.
-attributes='attr1 attr2 ...'
Declare the table attributes, which are inserted into the
"TABLE" token. For example, the option:
-attributes='BORDER=0 CELLSPACING=2 CELLPADDING=4'
would cause the following HTML:
<TABLE BORDER=0 CELLSPACING=2 CELLPADDING=4>
The default table attributes are:
<TABLE BORDER=1 CELLSPACING=1 CELLPADDING=1>
Set the HTML formats for the column titles. The
-title_formats (or just -tf) can be given multiple times, for
each column, or formats for multiple columns can be given on
the same option separated by semi-colons "";"".
Each fmtN can itself be multiple HTML items, separated by
commas. Each HTML element can be given either as an HTML
token (eg: ""\<BOLD\">"), or as a plain name (eg: ""BOLD"").
For example, here is a title format specification for three
columns, where the first column title should be bold italic,
the second italic, and the third italic in a smaller font:
The same as -title_formats but applies to the column data.
Define a mapping from column names, or indexes, to URLs to be
inserted as <A HREF's> around the values for the named
columns. Each colN is a column name or index, and each urlN
is a string representing the URL to be inserted for the given
The URL text may contain these substitution strings:
%K - will be substituted with the current column name (or
%V - will be substituted with the current column value.
Multiple -url options may be given, if desired, rather than
creating one long argument for a single -url. For example:
showtable -d: -f1,6 -titles=Login,Homedir \
-help Display some help to the user and quit.
If the input type is box, then vertical and horizontal box characters
are removed from the input stream, and blanks surrounding the vertical
box characters are removed. The vertical box characters (column
separaters) are ""|"" or "":"". The The horizontal box characters are
""+"" and ""-"".
Morever, data wrapped within a column is recognized and parsed as one
column value, by recognizing the presence of a wrapping prefix or
wrapping suffix character. Currently, the wrapping prefix character is
"<", and the wrapping suffix character is ">".
An example of data wrapped within a column is given here. The table
below has just two logical rows of data; with both rows having data
wrapped into multiple physical rows.
| Col 1 | Col 2 | Col 3 |
| This is>| Another>| Row 1,3>|
|< a cont>|< value. |<is also>|
|<inued >| |<long. |
|<value. | | |
|This is >| Item2-2 | Item2-3 |
When using the -list or -input=list options, either, or both, the input
and output may be in a "list" format, which is implemented using the
Each row of data consists of one or more columns, and ends with a blank
Each column consists of a column name, followed by a colon ":",
followed by an optional, single space or tab, followed by the column
value, on the same line.
Continuation lines of the previous column value consist of one or more
space or tab characters, a colon ":", one optional, single space or
tab, followed by the continuation value. In the example above, The
second column value of the second row was continued.
HTML Input with HTML Output
When using -html on data already containing HTML-formatted text, the
-noescape option should be used. By default, all input text is assumed
not to be HTML-formatted, and is escaped allowing embedded "<", ">"
characters, if any, to be displayed correctly.
Performs the actual output formatting.
Alan K. Stebbens email@example.com
· Currently, the box formatting characters are not configurable: '+'
for the corners; '-' and '|' for the tops and sides, respectively.
In an ideal world, these things would be configurable.
· The continuation prefix and suffix characters, '<' and '>',
respectively, are also not configurable:
· When reading table input, any data ending with ">" will be
considered to be continued by the next row of data. To avoid
this, use -input=simple.
· When selecting noncontiguous fields (ie: -f1,4>) without field
names, the default field names will be consecutively numbered from
1, which is counter-intuitive to the original selection. To avoid
this, name the fields using the -title=... option.
perl v5.12.2 2011-02-27 SHOWTABLE(1)