Examples of org.luaj.vm2.lib.TwoArgFunction

org.luaj.vm2.lib.ZeroArgFunction
Abstract base class for Java function implementations that take two arguments and return one value.
Subclasses need only implement {@link LuaValue#call(LuaValue,LuaValue)} to complete this class, simplifying development. All other uses of {@link #call()}, {@link #invoke(Varargs)},etc, are routed through this method by this class, dropping or extending arguments with {@code nil} values as required.
If more or less than two arguments are required, or variable argument or variable return values, then use one of the related function {@link ZeroArgFunction}, {@link OneArgFunction}, {@link ThreeArgFunction}, or {@link VarArgFunction}.
See {@link LibFunction} for more information on implementation libraries and library functions. @see #call(LuaValue,LuaValue) @see LibFunction @see ZeroArgFunction @see OneArgFunction @see ThreeArgFunction @see VarArgFunction


  public void testIndexFunction() {
    final LuaTable t = new_Table();
    final LuaTable mt = new_Table();    
    
    final TwoArgFunction fb = new TwoArgFunction() {
      public LuaValue call(LuaValue tbl, LuaValue key) {
        assertEquals(tbl, t);
        return valueOf("from mt: "+key);
      }
    };

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//     assertEquals( abc, string.get(1) );
    assertEquals( abc, function.get(1) );
    assertEquals( abc, thread.get(1) );
    
    // plain metatable
    mt.set( LuaValue.INDEX, new TwoArgFunction() {
      public LuaValue call(LuaValue arg1, LuaValue arg2) {
        return LuaValue.valueOf( arg1.typename()+"["+arg2.tojstring()+"]=xyz" );
      }
      
    });

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    }
  }
  
  // ----------------- sort support -----------------------------
  public void sort(final LuaValue comparator) {
    super.sort( new TwoArgFunction() {
      public LuaValue call(LuaValue arg1, LuaValue arg2) {
        return comparator.call( arg1.strongvalue(), arg2.strongvalue() );
      }
    } );
  }

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        tc.set("setlevelstatus", new setlevelstatus());
        tc.set("resetlevelstatus", new resetlevelstatus());
        tc.set("setbackground", new setbackground());
        tc.set("validateAtLeastXObjects", new validateAtLeastXObjects());
        tc.set("validateExactlyXManyObjects", new validateExactlyXManyObjects());
        tc.set("maze", new TwoArgFunction() {


            @Override
            public LuaValue call(LuaValue lv, LuaValue lv1) {
                return mazeToLuaTable(Prim.createMaze(lv.checkint(), lv1.checkint()));
            }

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    private boolean input = true;
    public Runnable phoneCallback;


    public LevelManager() {
        this.globals = JsePlatform.standardGlobals();
        this.globals.get("math").set("rand", new TwoArgFunction() {


            @Override
            public LuaValue call(LuaValue arg1, LuaValue arg2) {
                int min = arg1.toint();
                int max = arg2.toint();

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    private void fakeWikiBase() {
        // fake http://www.mediawiki.org/wiki/Extension:Wikibase
        final LuaValue mw = globals.get("mw");
        final LuaTable wikibase = new LuaTable();
        wikibase.set("getEntity", new ZeroArgFunction() {
            @Override public LuaValue call() {
                return NIL;
            }
        });
        mw.set("wikibase", wikibase);

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            }
        };
    }


    private LuaValue isSubsting() {
        return new ZeroArgFunction() {
            @Override public LuaValue call() {
                // TODO
                return FALSE;
            }
        };

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            }
        };
    }


    private LuaValue incrementExpensiveFunctionCount() {
        return new ZeroArgFunction() {
            @Override public LuaValue call() {
                if (++expensiveFunctionCount > MAX_EXPENSIVE_CALLS) {
                    error("too many expensive function calls");
                }
                return NIL;

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            }
        };
    }


    private LuaValue getContLangCode() {
        return new ZeroArgFunction() {
            @Override
            public LuaValue call() {
                return valueOf("en");
            }
        };

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        table.set("getEntityTable", getEntityTable());
        return table;
    }


    private LuaValue getEntityTable() {
        return new ZeroArgFunction() {
            @Override
            public LuaValue call() {
                return NIL;
            }
        };

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