10-05-2013
This sounds more like a homework assignment than a "real" project. If this is a homework assignment, you need to close this thread and start a new thread in the
Homework and Coursework Questions forum.
If not, you need to provide a lot more information about the input columns and the output you want.
Are the input columns in separate text files, a single text file with all of the data in a single column and some particular input lines indicating the start of a new column, actual columns in a text file (with what used to distinguish field boundaries), or something else? Are the column titles all in double quotes? Are the values in the input columns sorted (and, if not, is the script supposed to sort the output to appear as though the input had been sorted), or should it be a comma separated list of increasing (or increasing and decreasing) range values in the order in which they appeared in the input? (And, please use CODE tags to show sample input, sample output, and code segments!)
What variables do you want to adjust (and why)?
If you want us to help you learn how to do something, you need to provide us with more information about what you have (what shell, operating system, and operating system version are you using), what you want to do, and what resources you have to do it. This is not a forum for you to give vague comments about a project you'd like for someone else to design and implement for you.
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LEARN ABOUT DEBIAN
jifty::dbi::column
Jifty::DBI::Column(3pm) User Contributed Perl Documentation Jifty::DBI::Column(3pm)
NAME
Jifty::DBI::Column - Encapsulates a single column in a Jifty::DBI::Record table
DESCRIPTION
This class encapsulates a single column in a Jifty::DBI::Record table description. It replaces the _accessible method in
Jifty::DBI::Record.
It has the following accessors: "name type default validator boolean refers_to readable writable length".
new
is_numeric
Returns true if the column is of some numeric type, otherwise returns false.
is_string
Returns true if this column is a text field
is_boolean
Returns true if this column is a boolean
serialize_metadata
Returns a hash describing this column object with enough detail to fully describe it in the database. Intentionally skips "record_class",
all column attributes starting with "_", and all column attributes which are undefined. The "known" attributes in the "attributes" hash
are flattened and returned as well. The list of known attributes are:
container
label hints render_as
display_length
valid_values
available_values
autocompleted
documentation
no_placeholder
Setting this to a true value causes "load_by_cols" in Jifty::DBI::record to not use a placeholder when loading the column. This can
allow the database to come up with better query plans in some cases.
serialize_metadata2
Returns a hash describing this column object with enough detail to fully describe it in the database. Intentionally skips "record_class",
all column attributes starting with "_", and all column attributes which are undefined.
validator
Gets/sets the validator coderef for the column.
read
DEPRECATED. Use "$column->readable" instead.
write
DEPRECATED. Use "$column->writable" instead.
length
DEPRECATED. Use "$column->max_length" instead.
until
DEPRECATED. Use "$column->till" instead.
active
Returns the a true value if the column method exists for the current application version. The current application version is determined by
checking the "schema_version" in Jifty::DBI::Record of the column's "record_class". This method returns a false value if the column is not
yet been added or has been dropped.
This method returns a false value under these circumstances:
o Both the "since" trait and "schema_version" method are defined and "schema_version" is less than the version set on "since".
o Both the "till" trait and "schema_version" method are defined and "schema_version" is greater than or equal to the version set on
"till".
Otherwise, this method returns true.
perl v5.14.2 2012-01-25 Jifty::DBI::Column(3pm)