/usr/local/lib/swipl/library/ordsets.pl
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  • swipl
    • library
      • error.pl
      • debug.pl -- Print debug messages and test assertions
      • apply.pl -- Apply predicates on a list
      • lists.pl -- List Manipulation
      • broadcast.pl -- Event service
      • predicate_options.pl -- Access and analyse predicate options
      • shlib.pl
      • option.pl
      • thread_pool.pl -- Resource bounded thread management
      • gensym.pl -- Generate unique symbols
      • settings.pl -- Setting management
      • arithmetic.pl -- Extensible arithmetic
      • main.pl -- Provide entry point for scripts
      • readutil.pl -- Read utilities
      • operators.pl -- Manage operators
      • pairs.pl -- Operations on key-value lists
      • prolog_source.pl -- Examine Prolog source-files
      • record.pl -- Access compound arguments by name
      • quasi_quotations.pl -- Define Quasi Quotation syntax
      • pure_input.pl -- Pure Input from files and streams
      • solution_sequences.pl -- Modify solution sequences
      • ordsets.pl -- Ordered set manipulation
        • is_ordset/1
        • ord_empty/1
        • ord_seteq/2
        • list_to_ord_set/2
        • ord_intersect/2
        • ord_disjoint/2
        • ord_intersect/3
        • ord_intersection/2
        • ord_intersection/3
        • ord_intersection/4
        • ord_add_element/3
        • ord_del_element/3
        • ord_selectchk/3
        • ord_memberchk/2
        • ord_subset/2
        • ord_subtract/3
        • ord_union/2
        • ord_union/3
        • ord_union/4
        • ord_symdiff/3
      • random.pl -- Random numbers
      • base64.pl -- Base64 encoding and decoding
      • aggregate.pl -- Aggregation operators on backtrackable predicates
      • yall.pl -- Lambda expressions
      • sandbox.pl -- Sandboxed Prolog code
      • apply_macros.pl -- Goal expansion rules to avoid meta-calling
      • assoc.pl -- Binary associations
      • prolog_format.pl -- Analyse format specifications
      • csv.pl -- Process CSV (Comma-Separated Values) data
      • pprint.pl -- Pretty Print Prolog terms
      • atom.pl -- Operations on atoms
      • modules.pl -- Module utility predicates
      • occurs.pl -- Finding and counting sub-terms
      • prolog_xref.pl -- Prolog cross-referencer data collection
      • prolog_colour.pl
      • lazy_lists.pl -- Lazy list handling
      • ugraphs.pl -- Graph manipulation library
      • iostream.pl -- Utilities to deal with streams
      • url.pl -- Analysing and constructing URL
      • www_browser.pl -- Open a URL in the users browser
      • prolog_pack.pl -- A package manager for Prolog
      • git.pl -- Run GIT commands
      • utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
      • dialect.pl -- Support multiple Prolog dialects
      • system.pl -- System utilities
      • terms.pl -- Term manipulation
      • date.pl -- Process dates and times
      • persistency.pl -- Provide persistent dynamic predicates
      • prolog_stack.pl -- Examine the Prolog stack
      • edinburgh.pl -- Some traditional Edinburgh predicates
      • prolog_clause.pl -- Get detailed source-information about a clause
      • prolog_breakpoints.pl -- Manage Prolog break-points
      • wfs.pl -- Well Founded Semantics interface
      • prolog_code.pl -- Utilities for reasoning about code
      • sort.pl
      • dicts.pl -- Dict utilities
      • dif.pl -- The dif/2 constraint
      • varnumbers.pl -- Utilities for numbered terms
      • pio.pl -- Pure I/O
      • base32.pl -- Base32 encoding and decoding
      • charsio.pl -- I/O on Lists of Character Codes
      • codesio.pl -- I/O on Lists of Character Codes
      • coinduction.pl -- Co-Logic Programming
      • heaps.pl -- heaps/priority queues
      • rbtrees.pl -- Red black trees
      • statistics.pl -- Get information about resource usage
      • when.pl -- Conditional coroutining
      • backcomp.pl -- Backward compatibility
      • quintus.pl -- Quintus compatibility
      • help.pl -- Text based manual
      • prolog_codewalk.pl -- Prolog code walker
      • prolog_metainference.pl -- Infer meta-predicate properties
      • portray_text.pl -- Portray text
      • increval.pl -- Incremental dynamic predicate modification
      • tables.pl -- XSB interface to tables
      • ansi_term.pl -- Print decorated text to ANSI consoles
      • prolog_trace.pl -- Print access to predicates
      • threadutil.pl -- Interactive thread utilities
      • oset.pl -- Ordered set manipulation
      • edit.pl -- Editor interface
      • win_menu.pl -- Console window menu
      • tty.pl -- Terminal operations
      • qsave.pl -- Save current program as a state or executable
      • zip.pl -- Access resource ZIP archives
      • thread.pl -- High level thread primitives
      • prolog_versions.pl -- Demand specific (Prolog) versions
      • prolog_profile.pl -- Execution profiler
      • prolog_coverage.pl -- Coverage analysis tool
      • prolog_debug.pl -- User level debugging tools
      • streams.pl -- Manage Prolog streams
      • check.pl -- Consistency checking
      • shell.pl -- Elementary shell commands
      • listing.pl -- List programs and pretty print clauses
      • optparse.pl -- command line parsing
 ord_symdiff(+Set1, +Set2, ?Difference) is det
Is true when Difference is the symmetric difference of Set1 and Set2. I.e., Difference contains all elements that are not in the intersection of Set1 and Set2. The semantics is the same as the sequence below (but the actual implementation requires only a single scan).
      ord_union(Set1, Set2, Union),
      ord_intersection(Set1, Set2, Intersection),
      ord_subtract(Union, Intersection, Difference).

For example:

?- ord_symdiff([1,2], [2,3], X).
X = [1,3].