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tcl.fl

Verb: Access/TCL, Releases: AP

Forms single list from two lists.

Syntax

fl file.reference1 list1 {operators} {file.reference2} {list2} fl ?

Description

forms a single list from two lists using intersection, union, or exclusion operators.

If file.reference2 is not specified, file.reference2 is assumed to be the same as file.reference1. If list2 is not specified, it is assumed to be the same as list1. If neither file2 nor list2 are specified, the effect is the same as a get-list. The created list overlays list1 in file1.

The '?' displays help text on the screen.

operators:

= Indicates an intersection. Forms list of matching items.
+ Indicates a union. Forms list of nonduplicate items.
- Indicates an exclusion. Forms list of items not in list2.

Example

fl pointer-file football.fans + baseball.fans

This creates a list of all sports fans from both lists.

fl pointer-file football.fans = baseball.fans

This creates a list of those who enjoy both sports.

fl pointer-file football.fans - baseball.fans

This creates a list of those who like football only.

See Also

Command Name Type Description
active.list Definition A list of strings delimited by attribute marks created by one of the list-generating processes.
tcl.compare-list Verb: Access Compares two lists for intersections.
tcl.edit-list Verb: Access Edits saved list using line editor.
basic.readnext Statement Retrieves the next item-id from an active list.
tcl.get-list Verb: Access Retrieves previously saved list.
tcl.sort-list Verb: Access Retrieves, sorts and rewrites previously saved list.
access.nselect Verb: Access Performs 'not' select - only items not there.
tcl.copy-list Verb: Access Copies previously saved lists.
tcl.save-list Verb: Access Saves active list.
secondary.list Definition A list of item-id's generated by one of the list-generating processes while an active list is present.
tcl.el Verb: Access Edits saved list using Update processor.
tcl.delete-list Verb: Access Deletes previously saved lists.

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