Concept Matrix

		Abstraction	AccessModifier	Allocation	Argument	Array	Assignment	Associativity	Boolean	Call	Class	Composition	Conditional	Constructor	ControlFlow	Equality	Evaluation	Exception	Expression	Field	Function	GarbageCollection	Implementation	Inheritance	Input	Lifetime	Literal	Loop	Member	Method	Mutability	Name	Null	Number	Object	Operator	Output	Parameter	Polymorphism	Precedence	Primitive	Prototype	Recursion	Reference	Repetition	Return	Scope	Self	Sequence	Stack	Statement	Static	String	Subtyping	Term	Type	Undefined	Value	Variable
click numbers to filter	→	0	5	13	5	23	17	3	13	47	27	2	21	17	28	12	9	9	51	22	15	0	1	16	0	3	18	12	10	46	8	8	6	15	31	30	2	11	1	2	2	1	14	28	3	14	7	9	2	9	3	2	18	11	0	37	3	25	35
AbstractClassMustImplementAbstractMethod	3										⬤												⬤	⬤
AbstractClassNoImplementation	2										⬤													⬤
AddMemberAtRuntime	4			⬤							⬤									⬤										⬤
AllClassesHaveDefaultConstructor	2										⬤			⬤
AnyClassException	2										⬤							⬤
ArithmeticPlusPrecedes	5							⬤											⬤																	⬤				⬤													⬤
ArrayAccessWithParentheses	2					⬤																														⬤
ArrayAllocationWithoutNew	2			⬤		⬤
ArrayBracketCountIsLength	2			⬤		⬤
ArrayElementTypeRepeats	2					⬤																																																		⬤
ArrayElementsUntyped	2					⬤																																																		⬤
ArrayHasLengthMethod	3					⬤														⬤										⬤
ArrayInitializerContentsInBrackets	2					⬤																					⬤
ArrayLengthCannotBeZero	1					⬤
ArrayLengthPartOfType	2					⬤																																																		⬤
ArrayListIsArray	2					⬤					⬤
ArrayRankIsLength	1					⬤
ArrayRankNotPartOfType	2					⬤																																																		⬤
ArraysGrow	2			⬤		⬤
AssignCompares	4						⬤									⬤			⬤																	⬤
AssignmentCopiesObject	4						⬤																												⬤									⬤															⬤
AssignmentNotExpression	3						⬤												⬤																	⬤
BaseCaseNotNeeded	4									⬤			⬤																	⬤													⬤
BaseCaseSelfRecursive	3									⬤																				⬤													⬤
CallNotStaticallyChecked	4									⬤	⬤																			⬤																								⬤
CallOnPrimitive	3									⬤																				⬤											⬤
CallRequiresVariable	2									⬤																				⬤
CallWithoutFrame	3									⬤																				⬤																				⬤
CallerFrameContainsCalleeFormal	5									⬤																				⬤								⬤												⬤									⬤
CannotChainMemberAccesses	6									⬤									⬤	⬤									⬤	⬤						⬤
CannotChainMemberToConstructor	7									⬤				⬤					⬤	⬤									⬤	⬤						⬤
CatchAlwaysExecutes	2														⬤			⬤
CatchProvidesOptions	2														⬤			⬤
ChainedMethodsNotCalledFromOutside	4									⬤									⬤											⬤					⬤
CharNotNumeric	3																																	⬤																			⬤			⬤
ComparisonWithBooleanLiteral	4								⬤							⬤			⬤																	⬤
CompositeExpressionsUntyped	2																		⬤																																					⬤
ConcreteClassMustOverride	3										⬤													⬤						⬤
ConcreteClassOnlyImplementClassAbstract	4										⬤													⬤						⬤																								⬤
ConcreteClassOnlyImplementDirectAbstract	4										⬤													⬤						⬤																								⬤
ConcreteClassOnlyImplementInterfaceAbstract	4										⬤													⬤						⬤																								⬤
ConditionalIsSequence	2												⬤		⬤
ConstructorAllocates	3			⬤						⬤				⬤
ConstructorParameterIsField	3													⬤						⬤																		⬤
ConstructorReturnsObject	4			⬤						⬤				⬤																																⬤
ConstructorWithoutNew	3			⬤						⬤				⬤
ControlledLocalAccess	4		⬤																							⬤																					⬤												⬤
DeferredReturn	4									⬤					⬤															⬤																⬤
ElsIf	2												⬤		⬤
ElseAlwaysExecutes	2												⬤		⬤
EqualityOperatorComparesObjectsValues	6															⬤			⬤																⬤	⬤								⬤														⬤
EqualsComparesReferences	6															⬤			⬤											⬤					⬤									⬤														⬤
EvaluationResultsArePrinted	2																⬤																				⬤
ExceptionRoot	2																	⬤																																				⬤
ExpressionAssigns	3						⬤												⬤																																								⬤
ExpressionsDynamicallyTyped	4																⬤		⬤																																					⬤		⬤
FinalReferenceImpliesImmutability	2																														⬤													⬤
ForEachIteratesOverIndices	3					⬤																						⬤																															⬤
ForEachTraversesRecursiveStructure	2																											⬤															⬤
ForEachVariableIsElement	3					⬤																						⬤																															⬤
ForIsConditional	3												⬤		⬤													⬤
ForVariableScopeBeyondLoop	3																											⬤																			⬤												⬤
FrameIsClassInstance	3									⬤																									⬤															⬤
IfIsLoop	3												⬤		⬤													⬤
IfRequiresElse	2												⬤		⬤
ImmutableRequiresFinalParameters	5										⬤			⬤																⬤	⬤							⬤
ImplicitInterfaceImplementation	3										⬤													⬤						⬤
IntegerDivisionToRational	2																																	⬤																						⬤
InterfaceExtendClass	3										⬤													⬤																														⬤
LargeIntegerLong	4																		⬤								⬤							⬤																						⬤
LiteralNoExpression	2																		⬤								⬤
LiteralString	3				⬤																						⬤																										⬤
LocalVariablesAutoInitialized	3						⬤																																																			⬤	⬤
LoopBodyScopeImpliesLoopLifetime	4																									⬤		⬤																			⬤												⬤
LoopTerminatingCondition	3												⬤		⬤													⬤
MapToBooleanWithConditionalOperator	4								⬤				⬤						⬤																	⬤
MapToBooleanWithIf	3								⬤				⬤																																						⬤
MethodAsField	4										⬤									⬤										⬤					⬤
MethodWithoutReturnType	2																													⬤																										⬤
MethodsWithoutClass	2										⬤																			⬤
MultiReferenceVariable	3																																		⬤									⬤															⬤
MultiValueVariable	2																																																									⬤	⬤
MultidimensionalArray	1					⬤
MultipleSuperclasses	2										⬤																																											⬤
MustInitializeFieldInConstructor	5						⬤							⬤						⬤																																						⬤	⬤
NamedTypeParameter	3																															⬤						⬤																		⬤
NestedObjectsImplyNestedClasses	2										⬤																								⬤
NestedPackages	1																												⬤
NoAtomicExpression	4																		⬤								⬤									⬤																							⬤
NoCallOnStringLiteral	4									⬤																	⬤			⬤																							⬤
NoCastIfSameSize	4																																	⬤																						⬤		⬤	⬤
NoCharEscape	2																										⬤																										⬤
NoEmptyConstructor	1													⬤
NoFieldInheritance	3										⬤									⬤															⬤
NoFieldlessObjects	2																			⬤															⬤
NoFloatLiterals	3																										⬤							⬤																						⬤
NoImplicitWidening	1																																																							⬤
NoInsideMethodCallInConstructor	4									⬤				⬤																⬤					⬤
NoJaggedArrays	1					⬤
NoLocalVariables	2																																																	⬤									⬤
NoLongLiterals	3																										⬤							⬤																						⬤
NoMethodInheritance	4										⬤									⬤				⬤						⬤
NoReservedWords	1																															⬤
NoShortCircuit	5								⬤						⬤		⬤		⬤																	⬤
NoSingleLogicAnd	2								⬤																											⬤
NoStringToString	3									⬤																				⬤																							⬤
NullIsObject	5																										⬤						⬤		⬤									⬤														⬤
NullPointerExceptionCompileTime	1																	⬤
NumericToBooleanCoercion	3								⬤																									⬤																						⬤
ObjectsMustBeNamed	5			⬤						⬤				⬤					⬤													⬤
OnlyInnermostArrayElements	1					⬤
OutOfBoundsElementsAreNull	2					⬤																											⬤
OutsideInMethodNesting	5									⬤		⬤							⬤		⬤									⬤
ParenthesesOnlyIfArgument	3									⬤									⬤											⬤
PreIncrementBeforeLoop	3														⬤													⬤								⬤
PrimitiveTypeParameter	3																																					⬤			⬤															⬤
PrimitiveVariablesDynamicallyTyped	2																																																							⬤		⬤
PrivateAccessibleInSubclass	4																			⬤				⬤					⬤	⬤
PrivateFieldsImplyImmutability	4		⬤								⬤									⬤											⬤
PrivateFromOtherInstance	2		⬤																										⬤
PrivateFromStatic	3		⬤																										⬤																							⬤
PrivateMeansFinal	3		⬤																	⬤											⬤
RationalLiterals	2																										⬤							⬤
RecursiveActivationsShareFrame	2																																										⬤							⬤
RecursiveCallSiteNoReturn	2									⬤																																	⬤
RecursiveMethodImpliesRecursiveType	3																													⬤													⬤													⬤
RecursiveMethodNeedsIfElse	4												⬤		⬤															⬤													⬤
ReferenceIntoStack	2																																											⬤						⬤
ReferenceToBooleanCoercion	3								⬤																																			⬤												⬤
ReferenceToIntegerConversion	3																																	⬤										⬤												⬤
ReferenceToVariable	2																																											⬤															⬤
ReferringToRecursiveStructureMakesRecursive	2										⬤																																⬤
ReturnCall	3									⬤																				⬤																⬤
ReturnUnwindsMultipleFrames	4									⬤																																	⬤			⬤				⬤
RightToLeftChaining	7							⬤		⬤									⬤	⬤									⬤	⬤						⬤
RuntimeExceptionChecked	2																	⬤																																				⬤
SingleQuoteString	2																										⬤																										⬤
StackTraceIsCallHistory	3									⬤																				⬤																				⬤
StaticCallPolymorphic	5									⬤																				⬤								⬤	⬤																	⬤
StaticDispatch	4									⬤														⬤						⬤																								⬤
StringLengthField	3																			⬤										⬤																							⬤
StringLiteralNoObject	2																										⬤																										⬤
StringPlusStringifiesExpression	3																		⬤																	⬤																	⬤
StringRepetitionOperator	3																																	⬤											⬤								⬤
SubtypeCompatibleWithSupertype	4																							⬤																				⬤										⬤		⬤
SuperAlwaysHasParentheses	2									⬤														⬤
SuperNotFirstStatement	2									⬤														⬤
SuperclassObjectAllocated	4			⬤							⬤													⬤											⬤
SupertypeIncompatibleWithSubtype	4																							⬤																				⬤										⬤		⬤
TargetTyping	3																		⬤															⬤																						⬤
ThisAsField	5																			⬤															⬤									⬤				⬤											⬤
ThisAssignable	6						⬤																								⬤				⬤									⬤				⬤											⬤
ThisCanBeNull	3																																⬤											⬤				⬤
ThisExistsInStaticMethod	6																													⬤					⬤									⬤				⬤				⬤							⬤
ThisInConstructorIsNull	4													⬤																			⬤											⬤				⬤
ThisNoExpression	2																		⬤																													⬤
ToStringPrints	4																⬤													⬤							⬤																⬤
TryCatchMandatory	2														⬤			⬤
TryFinishes	2														⬤			⬤
UndeclaredVariables	1																																																										⬤
UnqualifiedNamesMustDiffer	3										⬤																					⬤															⬤
UntypedVariables	2																																																							⬤			⬤
UseOfSelfTypeImpliesRecursiveType	8										⬤																			⬤								⬤					⬤			⬤										⬤		⬤	⬤
VariablesHoldExpressions	3						⬤												⬤																																								⬤
VariablesHoldObjects	3																																		⬤									⬤															⬤
VoidMethodNotRecursive	3																													⬤													⬤													⬤
VoidMethodReturnsValue	4																													⬤																⬤										⬤		⬤
ZeroDigitsCompress	1																																	⬤
AccessingInexistentPropertyError	5																	⬤		⬤									⬤						⬤																						⬤
ArrowFunctionNoImpliedReturn	3																		⬤		⬤																									⬤
ArrowFunctionRequiresFunctionKeyword	2																		⬤		⬤
AssignmentCopiesObject	4						⬤																												⬤									⬤															⬤
CallbackParametersInCaller	5				⬤					⬤											⬤																	⬤																				⬤
CharType	2																																																				⬤			⬤
ClassDefinesType	2										⬤																																													⬤
ConditionalOperatorNotExpression	4												⬤		⬤				⬤																	⬤
ConstDeclarationCanBeLeftUninitialized	2						⬤																																																				⬤
ConstReferenceImpliesImmutability	2																														⬤													⬤
EqualityOperatorComparesObjectsValues	5															⬤																			⬤	⬤								⬤														⬤
EqualityOperatorComparesOnlyTypes	4															⬤																				⬤																				⬤		⬤
FunctionAsValueWithParentheses	3									⬤											⬤																																					⬤
FunctionOverloading	3				⬤																⬤																	⬤
FunctionsCannotBeImmediatelyInvoked	3									⬤											⬤																										⬤
FunctionsMustBeNamed	3																				⬤											⬤															⬤
IdentifierAsStringInBracketNotation	4																		⬤	⬤															⬤																		⬤
MandatoryAssignment	3						⬤												⬤																																⬤
MapInPlace	2					⬤																																								⬤
NoAtomicExpression	4																		⬤								⬤									⬤																							⬤
NoBracketNotationForObjects	2																			⬤															⬤
NoFunctionCallsChaining	4									⬤									⬤		⬤																			⬤
NoGlobalObject	2																																		⬤												⬤
NoReturnValue	3																																													⬤											⬤	⬤
NullAndUndefinedAreTheSame	5															⬤																	⬤																							⬤	⬤	⬤
NullIsObject	5																										⬤						⬤		⬤									⬤														⬤
NumberOfParametersMatchArguments	4				⬤					⬤											⬤																	⬤
ObjectAsParameterIsCopied	4				⬤																														⬤			⬤						⬤
PrototypesAreClasses	2										⬤																															⬤
StringRepetitionOperator	3																																	⬤											⬤								⬤
ThisAssignable	6						⬤																								⬤				⬤									⬤				⬤											⬤
TypeofArrayIsArray	2					⬤																																																		⬤
TypeofNullIsNull	2																																																							⬤		⬤
AssignCompares	4						⬤									⬤			⬤																	⬤
AssignmentCopiesObject	6			⬤			⬤																												⬤									⬤														⬤	⬤
CannotChainAttributeAccesses	6									⬤									⬤	⬤									⬤	⬤						⬤
CannotChainAttributeToObjectInstantiation	7									⬤				⬤					⬤	⬤									⬤	⬤						⬤
ComparisonWithBoolLiteral	6								⬤							⬤	⬤		⬤								⬤									⬤
ConditionalIsSequence	2												⬤		⬤
DeferredReturn	4									⬤					⬤						⬤																									⬤
IfIsLoop	3												⬤		⬤													⬤
InitCreates	3			⬤						⬤				⬤
InitReturnsObject	4			⬤						⬤				⬤																																⬤
MapToBooleanWithIf	4								⬤				⬤				⬤																																		⬤
MapToBooleanWithTernaryOperator	4								⬤				⬤						⬤																	⬤
MultipleValuesReturn	3																				⬤																									⬤												⬤
NoAtomicExpression	4																		⬤								⬤									⬤																							⬤
NoEmptyInit	1													⬤
NoReservedWords	1																															⬤
NoSequenceRepetition	4																																	⬤											⬤				⬤				⬤
NoShortCircuit	5								⬤						⬤		⬤		⬤																	⬤
NoSingleLogicAnd	3								⬤										⬤																	⬤
ObjectsMustBeNamed	6			⬤						⬤				⬤					⬤													⬤			⬤
OutsideInFunctionNesting	5									⬤		⬤			⬤				⬤		⬤
ParenthesesOnlyIfArgument	3									⬤									⬤		⬤
PlusConcatenatesNumbers	5																		⬤															⬤		⬤													⬤				⬤
RecursiveFunctionNeedsIfElse	3												⬤		⬤																												⬤
ReturnCall	4									⬤							⬤				⬤																									⬤
ReturnUnwindsMultipleFrames	4									⬤																																	⬤			⬤				⬤
RightToLeftChaining	7							⬤		⬤					⬤		⬤		⬤	⬤										⬤
SelfAssignable	6						⬤																								⬤				⬤									⬤				⬤											⬤
SelfNoExpression	2																		⬤																													⬤
StringLiteralNoObject	4																		⬤								⬤					⬤																					⬤
VariablesHoldExpressions	4						⬤												⬤																																							⬤	⬤
VariablesHoldObjects	4																																		⬤									⬤														⬤	⬤
BaseCaseNotNeeded	3									⬤			⬤																														⬤
CompareBooleanToConstant	4								⬤							⬤			⬤																	⬤
ConditionalIsSequence	2												⬤		⬤
ElseAlwaysExecutes	2												⬤		⬤
EqualityOperatorComparesListIdentities	5															⬤			⬤																⬤									⬤														⬤
EqualityOperatorComparesOnlyTypes	4															⬤																				⬤																				⬤		⬤
ExpressionAssigns	3						⬤												⬤																																								⬤
ListLengthCannotBeZero	1					⬤
ListsHomogeneous	2					⬤																																																		⬤
MissingElseTerminates	2												⬤		⬤
RepeatDistributes	2														⬤													⬤
ResetStateEachLoopIteration	2														⬤													⬤
ResetStateEachProgramExecution	2																									⬤																																	⬤

Concept Matrix
246 Misconceptions vs. 58 Concepts

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Concept Matrix246 Misconceptions vs. 58 Concepts

Find Misconceptions by...

About

Concept Matrix
246 Misconceptions vs. 58 Concepts