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Release Notes V19.0
Release Notes V19.0
- Introduction
  Introduction
- Configuration Parameters
  Configuration Parameters
- Language Reference Changes
  Language Reference Changes
- Object Reference Changes
  Object Reference Changes
Windows Installation
Windows Installation
- Documentation
- Files and Directories
- File Extensions
- APL Fonts
- Interoperability and Compatibility
- The APL Command Line
- APL Exit Codes
- Dyalog Serial Number
- Configuration Parameters
  Configuration Parameters
  - Introduction
  - AddClassHeaders
  - AplCoreName
  - aplk
  - aplkeys
  - aplnid
  - aplt
  - apltrans
  - APL_CODE_E_MAGNITUDE
  - APL_COMPLEX_AS_V12
  - APL_FCREATE_PROPS_C
  - APL_FCREATE_PROPS_J
  - APL_FAST_FCHK
  - APL_MAX_THREADS
  - APL_TextInAplCore
  - AutoDPI
  - AutoComplete
    AutoComplete
    
    CancelKey1
    
    CancelKey2
    
    Cols
    
    CommonKey1
    
    CompleteKey1
    
    CompleteKey2
    
    Enabled
    
    History
    
    HistorySize
    
    PrefixSize
    
    Rows
    
    ShowFiles
  - AutoFormat
  - AutoIndent
  - auto_pw
  - CFEXT
  - ClassicMode
  - ClassicModeSavePosition
  - CMD_PREFIX and CMD_POSTFIX
  - ConfigFile
  - confirm_abort
  - confirm_close
  - confirm_fix
  - confirm_session_delete
  - default_div
  - default_io
  - default_ml
  - default_pp
  - default_pw
  - default_rtl
  - default_wx
  - DMXOUTPUTONERROR
  - DockableEditWindows
  - DoubleClickEdit
  - dyalog
  - DyalogEmailAddress
  - DyalogHelpDir
  - DyalogInstallDir
  - DyalogLink
  - DyalogStartup
  - DyalogStartupSE
  - DyalogStartup_X
  - DyalogWebSite
  - DYALOG_DISCARD_FN_SOURCE
  - DYALOG_EVENTLOGGINGLEVEL
  - DYALOG_EVENTLOGNAME
  - DYALOG_GUTTER_ENABLE
  - Dyalog_LineEditor_Mode
  - Dyalog_NETCore
  - DYALOG_NOPOPUPS
  - DYALOG_PIXEL_TYPE
  - DYALOG_SERIAL
  - EditorState
  - Edit_Cols
  - Edit_First_X
  - Edit_First_Y
  - Edit_Offset_X
  - Edit_Offset_Y
  - Edit_Rows
  - ENABLE_CEF
  - ErrorOnExternalException
  - ExternalHelpURL
  - File_Stack_Size
  - greet_bitmap
  - history_size
  - inifile
  - InitFullScriptNormal
  - InitFullScriptSusp
  - InitialKeyboardLayout
  - InitialKeyboardLayoutInUse
  - InitialKeyboardLayoutShowAll
  - input_size
  - KeyboardInputDelay
  - Load
  - localdyalogdir
  - log_file
  - log_file_inuse
  - log_size
  - LX
  - mapchars
  - MaxAplCores
  - maxws
  - OverstrikesPopup
  - PassExceptionsToOpSys
  - pfkey_size
  - ProgramFolder
  - PropertyExposeRoot
  - PropertyExposeSE
  - qcmd_timeout
  - ResolveOverstrikes
  - RIDE_Init
  - RIDE_Spawned
  - RunAsService
  - SaveContinueOnExit
  - SaveLogOnExit
  - SaveSessionOnExit
  - Serial
  - SessionOnTop
  - session_file
  - ShowStatusOnError
  - SingleTrace
  - SkipLines
  - SM_Cols
  - SM_Rows
  - StatusOnEdit
  - TabStops
  - ToolBarsOnEdit
  - TraceStopMonitor
  - Trace_First_X
  - Trace_First_Y
  - Trace_level_warn
  - Trace_Offset_X
  - Trace_Offset_Y
  - Trace_On_Error
  - UCMDCacheFile
  - UnicodeToClipboard
  - URLHighlight
  - UseExternalHelpURL
  - UserConfigFile
  - UseXCV
  - ValueTips
    ValueTips
    
    ValueTips/ColourScheme
    
    ValueTips/Delay
    
    ValueTips/Enabled
  - WantsSpecialKeys
  - WrapSearch
  - WrapSearchMsgBox
  - WSEXT
  - WSPATH
  - XPLookAndFeel
  - yy_window
- Registry SubFolders
- Configuration Files
- Window Captions
- Workspace Management
- Interface with Windows
- Auxiliary Processors
- Access Control for External Variables
- Shell Scripts
- Creating Executables
- Run-Time Applications and Components
- Run-Time Applications Additonal Considerations
- COM Objects and the Dyalog APL DLL
- APL Application as a Service
- APLService Logging Events
- Configuring the IDE
  Configuring the IDE
  - Configuration Dialog
    Configuration Dialog
    
    General Tab
    
    Unicode Input Tab
    
    Input Tab (Classic Edition)
    
    Output Tab (Classic Edition)
    
    Keyboard Shortcuts Tab
    
    Workspace Tab
    
    Help/DMX Tab
    
    Windows Tab
    
    Session Tab
    
    Trace/Edit Tab
    
    Auto Complete Tab
    
    SALT Tab
    
    User Commands Tab
    
    Object Syntax Tab
    
    Saved ResponsesTab
  - Colour Selection Dialog
  - Print Configuration Dialog
UNIX Installation
UNIX Installation
- Introduction
- Installing Dyalog APL
- Dyalog Serial Number
- Konsole
- APL VNC RDP
- PuTTY
- Configuration Parameters
  Configuration Parameters
- Configuring the Editor
- Starting from scripts
- Magic
- SE and SALT
- HOME dyalog directory
- QuadNA and UNIX
- Miscellaneous
- BuildID
Programmer's Guide
Programmer's Guide
- Introduction
  Introduction
  - Workspaces
  - Legal Names
  - Arrays
    Arrays
    
    Introduction
    
    Numbers
    
    Characters
    
    Enclosed Elements
    
    Specification of Variables
    
    Vector Notation
    
    Structuring of Arrays
    
    Display of Arrays
    
    Prototypes and Fill Items
    
    Cells and Subarrays
  - Expressions
  - Functions
  - Operators
  - Binding Strength
  - Function Trains
  - Search Functions and Hash Tables
  - Idiom Recogition
    Idiom Recogition
    
    Introduction
    
    Idiom List
  - Parallel Execution
  - Complex Numbers
  - 128 Bit Decimal Floating-Point Support
  - Namespaces
    Namespaces
    
    Overview
    
    Namespace Syntax
    
    Namespace Reference Evaluation
    
    Namespaces and Localisation
    
    Namespace References
    
    Unnamed Namespaces
    
    Arrays of Namespace References
    
    Distributed Assignment
    
    Distributed Functions
    
    Namespaces and Operators
    
    Serialising Namespaces
  - External Variables
  - Component Files
  - Auxiliary Processors
- Defined Functions and Operators
  Defined Functions and Operators
  - Introduction
  - Traditional Functions and Operators
    Traditional Functions and Operators
    
    Introduction
    
    Model Syntax
    
    Statements
    
    Global & Local Names
    
    Locals Lines
    
    Namelists
    
    Locked Functions & Operators
    
    Function Declaration Statements
    Function Declaration Statements
    
    Introduction
    
    Access Statement
    
    Attribute Statement
    
    Implements Statement
    
    Signature Statement
    
    Control Structures
    Control Structures
    
    Introduction
    
    If Statement
    
    While Statement
    
    Repeat Statement
    
    For Statement
    
    Select Statement
    
    With Statement
    
    Hold Statement
    
    Trap Statement
    
    GoTo Statement
    
    Return Statement
    
    Leave Statement :Leave
    
    Continue Statement
    
    Section Statement
    
    Disposable Statement
    
    APL Line Editor
  - Dfns and Dops
    Dfns and Dops
    
    Introduction
    
    MultiLine Dfns
    
    Default Left Argument
    
    Guards
    
    Shy Result
    
    Lexical Name Scope
    
    Error Guards
    
    Dops
    
    Recursion
    
    Tail Calls
    
    Restrictions
- Object Oriented Programming
  Object Oriented Programming
  - Introducing Classes
    Introducing Classes
    
    Introducing Classes
    
    Defining Classes
    
    Editing Classes
    
    Inheritance
    
    Instances
  - Constructors
    Constructors
    
    Introduction
    
    Constructor Overloading
    
    Niladic (Default) Constructors
    
    Empty Arrays of Instances: Why?
    
    Empty Arrays of Instances: How?
    
    Base Constructors
    
    Niladic Example
    
    Monadic Example
    
    Destructors
  - Class Members
    Class Members
    
    Introduction
    
    Fields
    Fields
    
    Introduction
    
    Public Fields
    
    Initialising Fields
    
    Private Fields
    
    Shared Fields
    
    Trigger Fields
    
    Methods
    Methods
    
    Methods
    
    Shared Methods
    
    Instance Methods
    
    Superseding Base Class Methods
    
    Properties
    Properties
    
    Properties
    
    Simple Instance Properties
    
    Simple Shared Properties
    
    Numbered Properties
    Numbered Properties
    
    Introduction
    
    Example
    
    The Default Property
    
    ComponentFile Class
    
    Keyed Properties
    Keyed Properties
    
    Introduction
    
    Example 1
    
    Example 2
  - Interfaces
    Interfaces
    
    Introduction
    
    Example
  - Including Namespaces in Classes
    Including Namespaces in Classes
    
    Introduction
    
    Example
  - Nested Classes
    Nested Classes
    
    Nested Classes
    
    GolfService Example
  - Namespace Scripts
    Namespace Scripts
    
    Namespace Scripts
    
    DiaryStuff Example
  - Including Script Files
  - Class Declaration Statements
    Class Declaration Statements
    
    Introduction
    
    Interface Statement
    
    Namespace Statement
    
    Class Statement
    
    Using Statement
    
    Attribute Statement
    
    Access Statement
    
    Implements Statement
  - Field Statement
  - Property Section
    Property Section
    
    Property Statement
    
    PropertyArguments Class
    
    PropertyGet Function Syntax
    
    PropertySet Function Syntax
    
    PropertyShape Function Syntax
- Threads
  Threads
- Triggers
  Triggers
- Component Files
  Component Files
- Error Trapping
  Error Trapping
- Error Messages
  Error Messages
  - Introduction
  - APL Error Messages
  - Operating System Error Messages
  - Windows Operating System Error Messages
  - APL Error Messages (A-Z)
    APL Error Messages (A-Z)
    
    bad ws
    
    cannot create name
    
    clear ws
    
    copy incomplete
    
    DEADLOCK
    
    defn error
    
    DOMAIN ERROR
    
    EOF INTERRUPT
    
    EXCEPTION
    
    FIELD CONTENTS RANK ERROR
    
    FIELD CONTENTS TOO MANY COLUMNS
    
    FIELD POSITION ERROR
    
    FIELD CONTENTS TYPE MISMATCH
    
    FIELD TYPE BEHAVIOUR UNRECOGNISED
    
    FIELD ATTRIBUTES RANK ERROR
    
    FIELD ATTRIBUTES LENGTH ERROR
    
    FULL SCREEN ERROR
    
    KEY CODE UNRECOGNISED
    
    KEY CODE RANK ERROR
    
    KEY CODE TYPE ERROR
    
    FORMAT FILE ACCESS ERROR
    
    FORMAT FILE ERROR
    
    FILE ACCESS ERROR
    
    FILE ACCESS ERROR CONVERTING
    
    FILE COMPONENT DAMAGED
    
    FILE DAMAGED
    
    FILE FULL
    
    FILE INDEX ERROR
    
    FILE NAME ERROR
    
    FILE NAME QUOTA USED UP
    
    FILE SYSTEM ERROR
    
    FILE SYSTEM NO SPACE
    
    FILE SYSTEM NOT AVAILABLE
    
    FILE SYSTEM TIES USED UP
    
    FILE TIE ERROR
    
    FILE TIED
    
    FILE TIED REMOTELY
    
    FILE TIE QUOTA USED UP
    
    FORMAT ERROR
    
    HOLD ERROR
    
    incorrect command
    
    INDEX ERROR
    
    INTERNAL ERROR
    
    INTERRUPT
    
    is name
    
    LENGTH ERROR
    
    LIMIT ERROR
    
    NONCE ERROR
    
    NO PIPES
    
    name is not a ws
    
    Name already exists
    
    Namespace does not exist
    
    not copied name
    
    not found name
    
    not saved this ws is name
    
    PROCESSOR TABLE FULL
    
    RANK ERROR
    
    RESIZE
    
    name saved date time
    
    SYNTAX ERROR
    
    sys error number
    
    TIMEOUT
    
    TRANSLATION ERROR
    
    TRAP ERROR
    
    too many names
    
    VALUE ERROR
    
    warning duplicate label
    
    warning duplicate name
    
    warning pendent operation
    
    warning label name present
    
    warning unmatched brackets
    
    warning unmatched parentheses
    
    was name
    
    WS FULL
    
    ws not found
    
    ws too large
  - Operating System Error Messages (A-Z)
    Operating System Error Messages (A-Z)
    
    FILE ERROR 1 Not owner
    
    FILE ERROR 2 No such file
    
    FILE ERROR 5 I O error
    
    FILE ERROR 6 No such device
    
    FILE ERROR 13 Permission denied
    
    FILE ERROR 20 Not a directory
    
    FILE ERROR 21 Is a directory
    
    FILE ERROR 23 File table overflow
    
    FILE ERROR 24 Too many open
    
    FILE ERROR 26 Text file busy
    
    FILE ERROR 27 File too large
    
    FILE ERROR 28 No space left
    
    FILE ERROR 30 Read only file
  - System Errors
- APLMon
  APLMon
Language Reference
Language Reference
- Symbols
  Symbols
- Primitive Functions
  Primitive Functions
  - Introduction
  - Scalar Functions
  - Mixed Functions
  - Notes
  - Scalar Monadic Functions
    Scalar Monadic Functions
    
    Negative
    
    Direction (Signum)
    
    Reciprocal
    
    Magnitude
    
    Floor
    
    Ceiling
    
    Exponential
    
    Natural Logarithm
    
    Pi Times
    
    Factorial
    
    Not
    
    Roll
    
    Type
  - Scalar Dyadic Arithmetic Functions
    Scalar Dyadic Arithmetic Functions
    
    Add
    
    Subtract
    
    Multiply
    
    Divide
    
    Residue
    
    Minimum
    
    Maximum
    
    Power
    
    Logarithm
    
    Binomial
  - Scalar Dyadic Logical Functions
    Scalar Dyadic Logical Functions
    
    And Lowest Common Multiple
    
    Or Greatest Common Divisor
    
    Nand
    
    Nor
    
    Less
    
    Less Or Equal
    
    Equal
    
    Greater Or Equal
    
    Greater
    
    Not Equal
  - Trigonometric Functions
  - Non-Scalar Monadic Structural Functions
    Non-Scalar Monadic Structural Functions
    
    Shape
    
    Ravel
    
    Ravel with Axes
    
    Reverse
    
    Table
    
    Tally
    
    Transpose
    
    Mix
    
    Split
    
    Enclose
    
    Enclose with Axes
    
    Nest
    
    Format
    
    Depth
    
    Enlist
  - Non-Scalar Dyadic Structural Functions
    Non-Scalar Dyadic Structural Functions
    
    Reshape
    
    Catenate and Laminate
    
    Rotate
    
    Dyadic Transpose
    
    Partitioned Enclose
    
    Partition
    
    Dyadic Format
  - Non-Scalar Selection Functions
    Non-Scalar Selection Functions
    
    Right
    
    Same
    
    Left
    
    Disclose
    
    Unique
    
    Unique Mask
    
    Pick
    
    Take
    
    Take with Axes
    
    Drop
    
    Drop with Axes
    
    Replicate
    
    Expand
    
    Excluding
    
    Intersection
    
    Union
  - Non-Scalar Selector Functions
    Non-Scalar Selector Functions
    
    Index Generator
    
    Grade Up
    
    Grade Down
    
    Index
    
    Index with Axes
    
    Index Of
    
    Interval Index
    
    Where
    
    Membership
    
    Find
    
    Dyadic Grade Up
    
    Dyadic Grade Down
    
    Deal
    
    Match
    
    Not Match
  - Non-Scalar Computational Functions
    Non-Scalar Computational Functions
    
    Zilde
    
    Abort
    
    Branch
    
    Execute
    
    Matrix Inverse
    
    Decode
    
    Encode
    
    Matrix Divide
  - Primitive Functions (A-Z)
    Primitive Functions (A-Z)
    
    Introduction
    
    Abort
    
    Add
    
    And, Lowest Common Multiple
    
    Assignment
    
    Assignment Indexed
    
    Assignment Selective
    
    Binomial
    
    Branch
    
    Catenate Laminate
    
    Catenate First
    
    Ceiling
    
    Circular
    
    Conjugate
    
    Deal
    
    Decode
    
    Depth
    
    Direction Signum
    
    Disclose
    
    Divide
    
    Drop
    
    Drop with Axes
    
    Enclose
    
    Enclose with Axes
    
    Encode
    
    Enlist
    
    Equal
    
    Excluding
    
    Execute
    
    Expand
    
    Expand First
    
    Exponential
    
    Factorial
    
    Find
    
    First
    
    Floor
    
    Format Monadic
    
    Format Dyadic
    
    Grade Down Monadic
    
    Grade Down Dyadic
    
    Grade Up Monadic
    
    Grade Up Dyadic
    
    Greater
    
    Greater Or Equal
    
    Index
    
    Index with Axes
    
    Index Generator
    
    Index Of
    
    Indexing
    
    Intersection
    
    Interval Index
    
    Left
    
    Less
    
    Less Or Equal
    
    Logarithm
    
    Magnitude
    
    Match
    
    Materialise
    
    Matrix Divide
    
    Matrix Inverse
    
    Maximum
    
    Membership
    
    Minimum
    
    Minus
    
    Mix
    
    Multiply
    
    Nand
    
    Natural Logarithm
    
    Negative
    
    Nest
    
    Nor
    
    Not
    
    Not Equal
    
    Not Match
    
    Or, Greatest Common Divisor
    
    Partition
    
    Partitioned Enclose
    
    Pi Times
    
    Pick
    
    Plus
    
    Power
    
    Ravel
    
    Ravel with Axes
    
    Reciprocal
    
    Replicate
    
    Replicate First
    
    Reshape
    
    Residue
    
    Reverse
    
    Reverse First
    
    Right
    
    Roll
    
    Rotate
    
    Rotate First
    
    Same
    
    Shape
    
    Split
    
    Subtract
    
    Table
    
    Take
    
    Take with Axes
    
    Tally
    
    Times
    
    Transpose Monadic
    
    Transpose Dyadic
    
    Type
    
    Union
    
    Unique
    
    Unique Mask
    
    Where
    
    Without
    
    Zilde
- Primitive Operators
  Primitive Operators
  - Introduction
  - Operator Syntax
  - Operators Summarised
  - Operators A-Z
    Operators A-Z
    
    Assignment Modified
    
    Assignment Indexed Modified
    
    Assignment Selective Modified
    
    At
    
    Atop
    
    Axis with Monadic Operand
    
    Axis with Dyadic Operand
    
    Beside
    
    Bind
    
    Commute
    
    Constant
    
    Each with Monadic Operand
    
    Each with Dyadic Operand
    
    I-Beam
    
    Inner Product
    
    Key
    
    Outer Product
    
    Over
    
    Power Operator
    
    Rank
    
    Reduce
    
    Reduce First
    
    Reduce N Wise
    
    Reduce First N Wise
    
    Scan
    
    Scan First
    
    Spawn
    
    Stencil
    
    Variant
- The I-Beam Operator
  The I-Beam Operator
- System Functions
  System Functions
  - Introduction
  - System Functions Categorised
    System Functions Categorised
    
    Introduction
    
    System Settings
    System Settings
    
    Introduction
    
    State Settings
    State Settings
    
    Comparison Tolerance
    
    Decimal Comparison Tolerance
    
    Division Method
    
    Floating Point Representation
    
    Index Origin
    
    Migration Level
    
    Print Precision
    
    Random Link
    
    Session Information and Management
    Session Information and Management
    
    Introduction
    
    Account Information
    
    Account Name
    
    Clear Workspace
    
    Copy Workspace
    
    Delay
    
    Load Workspace
    
    Sign Off APL
    
    Search Path
    
    Save Workspace
    
    Timestamp
    
    System Constants
    System Constants
    
    Introduction
    
    Constants
    Constants
    
    Alphabetic Characters
    
    Digits
    
    Null Item
    
    Tools and Access to External Facilities
    Tools and Access to External Facilities
    
    Introduction
    
    Tools and Access to External Utilities
    Tools and Access to External Utilities
    
    Execute Windows Command
    
    Start Windows Auxiliary Processor
    
    Comma Separated Values
    
    Data Representation Monadic
    
    Data Representation Dyadic
    
    Format Monadic
    
    Format Dyadic
    
    JSON Convert
    
    Map File
    
    Name Association
    
    Replace
    
    Search
    
    Execute UNIX Command
    
    Start UNIX Auxiliary Processor
    
    Unicode Convert
    
    Using Microsoft Net Search Path
    
    Verify Fix Input
    
    XML Convert
    
    Manipulating Functions and Operators
    Manipulating Functions and Operators
    
    Introduction
    
    Attributes
    
    Canonical Representation
    
    Edit Object
    
    Expunge Object
    
    Fix Definition
    
    Lock Definition
    
    Set Monitor
    
    Query Monitor
    
    Object Representation
    
    Nested Representation
    
    Profile Application
    
    Cross References
    
    Set Stop
    
    Query Stop
    
    Set Trace
    
    Query Trace
    
    Vector Representation
    
    Namespaces and Objects
    Namespaces and Objects
    
    Introduction
    
    Base Class
    
    Class
    
    Change Space
    
    Display Form
    
    Fix Script
    
    Instances
    
    New Instance
    
    Namespace
    
    Source
    
    This Space
    
    Input and Output
    Input and Output
    
    Introduction
    
    Input/Output
    Input/Output
    
    Character Input/Output
    
    Evaluated Input/Output
    
    Arbitrary Input
    
    Arbitrary Output
    
    Response Time Limit
    
    Component Files
    Component Files
    
    Introduction
    
    Append Component
    
    File System Availability
    
    File Check and Repair
    
    Copy File
    
    Create File
    
    Drop Components
    
    Erase File
    
    File History
    
    Hold File
    
    File Library List
    
    Tied File Names
    
    Tied File Numbers
    
    File Properties
    
    Read File Access Matrix
    
    Read File Component Information
    
    Read Component
    
    Rename File
    
    Replace Component
    
    Resize File
    
    File Size
    
    Set File Access Matrix
    
    Share Tie File
    
    Tie File
    
    Untie Files
    
    Native Files
    Native Files
    
    Introduction
    
    File Parts
    
    Make Directory
    
    Append Value to a Native File
    
    Create Native File
    
    Native File Copy
    
    Delete Native File or Directory
    
    Erase Native File
    
    Determine if Native File Exists
    
    Read Text File
    
    Native File Information
    
    Lock Native File
    
    Native File Move
    
    Names of open Native Files
    
    Tie Numbers of open Native Files
    
    File Name Parts
    
    Write Text File
    
    Read data from a Native File
    
    Rename Native File
    
    Write data to a Native File
    
    Change size of Native File
    
    Report current size of native file
    
    Open Native File
    
    Close one or more Native Files
    
    Specify/report Native File translation
    
    Threads
    Threads
    
    Introduction
    
    Thread Child Numbers
    
    Current Thread Identity
    
    Kill Thread
    
    Current Thread Name
    
    Thread Numbers
    
    Wait for Threads to Terminate
    
    Synchronisation
    Synchronisation
    
    Introduction
    
    Get Tokens
    
    Kill Thread
    
    Token Pool
    
    Put Tokens
    
    Token Requests
    
    Error Handling
    Error Handling
    
    Introduction
    
    Diagnostic Message
    
    Extended Diagnostic Message
    
    Event Message
    
    Event Number
    
    Exception
    
    Signal Event
    
    Trap Events
    
    Stack and Workspace
    Stack and Workspace
    
    Introduction
    
    Stack and Workspace Information
    Stack and Workspace Information
    
    Line Count
    
    Latent Expression
    
    Name Classification
    
    Name List
    
    Namespace Indicator
    
    Space Indicator
    
    State Indicator
    
    Shadow Name
    
    Size of Object
    
    State Indicator Stack
    
    State of Object
    
    Workspace Available
    
    Workspace Identification
    
    Extended State Indicator
    
    Shared Variables
    Shared Variables
    
    Introduction
    
    Query Access Control
    
    Set Access Control
    
    Offer Shared Variable
    
    Shared Variable Offer
    
    Query Degree of Coupling
    
    Shared Variable Query
    
    Shared Variable Retract Offer
    
    Shared Variable State
    
    GUI and COM Support
    GUI and COM Support
    
    Introduction
    
    Dequeue Events
    
    Export Object
    
    Enqueue Event
    
    Windows Create Object
    
    Windows Get Property
    
    Windows Child Names
    
    Windows Set Property
    
    Window Expose
    
    Miscellaneous
    Miscellaneous
    
    Introduction
    
    Underscored Alphabetic Characters
    
    Atomic Vector
    
    Atomic Vector Unicode
    
    Key Label
    
    Program Function Key
    
    Screen Dimensions
    
    Screen Map
    
    Screen Read
    
    Variant
    
    Terminal Control
    
    Set External Variable
    
    Query External Variable
  - System Variables
  - System Functions (A-Z)
    System Functions (A-Z)
    
    Introduction
    
    Character Input Output
    
    Evaluated Input Output
    
    Underscored Alphabetic Characters
    
    Alphabetic Characters
    
    Account Information
    
    Account Name
    
    Arbitrary Input
    
    Arbitrary Output
    
    Attributes
    
    Extended Attributes
    
    Atomic Vector
    
    Atomic Vector Unicode
    
    Base Class
    
    Case Convert
    
    Class
    
    Clear Workspace
    
    Execute Windows Command
    
    Start Windows Auxiliary Processor
    
    Canonical Representation
    
    Change Space
    
    Comma Separated Values
    
    Comparison Tolerance
    
    Copy Workspace
    
    Digits
    
    Decimal Comparison Tolerance
    
    Display Form
    
    Division Method
    
    Delay
    
    Diagnostic Message
    
    Extended Diagnostic Message
    
    Dequeue Events
    
    Data Representation Monadic
    
    Data Representation Dyadic
    
    Datetime
    
    Edit Object
    
    Event Message
    
    Event Number
    
    Exception
    
    Expunge Object
    
    Export Object
    
    File Append Component
    
    File System Available
    
    File Check and Repair
    
    File Copy
    
    File Create
    
    File Drop Component
    
    File Erase
    
    File History
    
    File Hold
    
    Fix Script
    
    Component File Library
    
    Format Monadic
    
    Format Dyadic
    
    File Names
    
    File Numbers
    
    File Properties
    
    Floating Point Representation
    
    File Read Access
    
    File Read Component Information
    
    File Read Component
    
    File Rename
    
    File Replace Component
    
    File Resize
    
    File Size
    
    File Set Access
    
    File Share Tie
    
    Exclusive File Tie
    
    File Untie
    
    Fix Definition
    
    Instances
    
    Index Origin
    
    JSON Convert
    JSON Convert
    
    Introduction
    
    JSON Name Mangling
    
    Key Label
    
    Line Count
    
    Load Workspace
    
    Lock Definition
    
    Latent Expression
    
    Map File
    
    Make Directory
    
    Migration Level
    
    Set Monitor
    
    Query Monitor
    
    Name Association
    
    Native File Append
    
    Name Classification
    
    Native File Copy
    
    Native File Create
    
    Native File Delete
    
    Native File Erase
    
    New Instance
    
    Native File Exists
    
    Read Text File
    
    Native File Information
    
    Name List
    
    Native File Lock
    
    Native File Move
    
    Native File Names
    
    Native File Numbers
    
    File Name Parts
    
    Write Text File
    
    Enqueue Event
    
    Nested Representation
    
    Native File Read
    
    Native File Rename
    
    Native File Replace
    
    Native File Resize
    
    Namespace
    
    Namespace Indicator
    
    Native File Size
    
    Native File Tie
    
    Null Item
    
    Native File Untie
    
    Native File Translate
    
    Sign Off APL
    
    Variant
    
    Object Representation
    
    Search Path
    
    Program Function Key
    
    Print Precision
    
    Profile Application
    
    Print Width
    
    Replace
    
    Cross References
    
    Random Link
    
    Space Indicator
    
    Response Time Limit
    
    Search
    
    Save Workspace
    
    Screen Dimensions
    
    Session Namespace
    
    Execute UNIX Command
    
    Start UNIX Auxiliary Processor
    
    Shadow Name
    
    State Indicator
    
    Signal Event
    
    Size of Object
    
    Screen Map
    
    Screen Read
    
    Source
    
    State Indicator Stack
    
    State of Object
    
    Set Stop
    
    Query Stop
    
    Set Access Control
    
    Query Access Control
    
    Shared Variable Offer
    
    Query Degree of Coupling
    
    Shared Variable Query
    
    Shared Variable Retract Offer
    
    Shared Variable State
    
    Allocate Token Range
    
    Terminal Control
    
    Thread Child Numbers
    
    Get Tokens
    
    This Space
    
    Current Thread Identity
    
    Kill Thread
    
    Current Thread Name
    
    Thread Numbers
    
    Token Pool
    
    Put Tokens
    
    Set Trace
    
    Query Trace
    
    Trap Event
    
    Token Requests
    
    Timestamp
    
    Wait for Threads to Terminate
    
    Unicode Convert
    
    Using Microsoft Net Search Path
    
    Vector Representation
    
    Verify Fix Input
    
    Workspace Available
    
    Windows Create Object
    
    Windows Get Property
    
    Windows Child Names
    
    Windows Set Property
    
    Workspace Identification
    
    Window Expose
    
    XML Convert
    
    Extended State Indicator
    
    Set External Variable
    
    Query External Variable
- System Commands
  System Commands
  - Introduction
  - System Commands (A-Z)
    System Commands (A-Z)
    
    List Classes
    
    Clear Workspace
    
    Windows Command Processor
    
    Save Continuation
    
    Copy Workspace
    
    Change Space
    
    Drop Workspace
    
    Edit Object
    
    Erase Object
    
    List Events
    
    List Global Defined Functions
    
    Display Held Tokens
    
    List Workspace Library
    
    Load Workspace
    
    List Methods
    
    Create Namespace
    
    List Global Namespaces
    
    List Global Namespaces Short
    
    Sign Off APL
    
    List Global Defined Operators
    
    Protected Copy
    
    List Properties
    
    Reset State Indicator
    
    Save Workspace
    
    Execute UNIX Command
    
    State Indicator
    
    Clear State Indicator
    
    State Indicator Name List
    
    Thread Identity
    
    List Global Defined Variables
    
    Workspace Identification
    
    Load without Latent Expression
- PCRE Specifications
  PCRE Specifications
Object Reference
Object Reference
Windows UI Guide
Windows UI Guide
Interface Guide
Interface Guide
- Introduction
  Introduction
- GUI Tutorial
  GUI Tutorial
- Graphics
  Graphics
- Composite Controls
  Composite Controls
- Hints and Tips
  Hints and Tips
- Grid Object
  Grid Object
- MDI
  MDI
- Docking
  Docking
- OLE Client
  OLE Client
- OLE Server
  OLE Server
- ActiveX Control
  ActiveX Control
- DDE
  DDE
.NET Interface
.NET Interface
- Overview
  Overview
- Accessing .Net Classes
  Accessing .Net Classes
- Using Windows.Forms
  Using Windows.Forms
- WPF
  WPF
  - Introduction
  - Temperature Converter
    Temperature Converter
    
    Introduction
    
    Using XAML
    
    Using Code
  - Data Binding
    Data Binding
    
    Introduction
    
    Text Example
    
    FontSize Example
    
    Text and FontSize using Code
    
    Text and Fontsize using XAML
    
    Filtered List Example
    
    NetObject Example
    
    DateTime Example
    
    DataGrid Example
    
    DataGrid Matrix Example
  - SyncFusion Introduction
  - SyncFusion CircularGauge Example
- APLScript
  APLScript
- Writing .Net Classes
  Writing .Net Classes
- Dyalog APL and IIS
  Dyalog APL and IIS
- Writing Web Services
  Writing Web Services
- Calling Web Services
  Calling Web Services
- Writing ASP.NET Web pages
  Writing ASP.NET Web pages
- Writing Custom Controls for ASP.NET
  Writing Custom Controls for ASP.NET
- Implementation Details
  Implementation Details
UNIX User Guide
UNIX User Guide

On this page

I-Beam is a monadic operator that provides a range of system related services.

I-Beam ⌶

I-Beam is a monadic operator that provides a range of system related services.

Examples

Monadic operator: I-Beam

Provides a system-related service determined by the left-operand value.

Language Elements

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