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Business Logic / Control
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Types of Control Functions
An overview of the types of functions distinguished within Control.
Mapping Functions
"isEmpty" (mapping::isEmpty)
Returns true if the mapping is empty.

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Business Logic / Control
Endless possibilities in data processing for your projects.
- Introduction to CTRL
  An introduction to the product's own programming language Control(CTRL).
- Control Classes
  The overview of classes available in Control.
- Types of Control Functions
  An overview of the types of functions distinguished within Control.
  - 32/64 bit Functions
  - Administration of Managers, Modules and Panels - Functions
  - Alert Handling Functions
    These functions are associated with data points and respond to alerts and changes to alerts.
  - Blob Functions
  - Communication Functions
  - Crypthographic Functions
  - Database Functions
  - Data point Functions
  - Error Functions
  - File Functions
  - Graphics Functions
  - Help Viewer Functions
    Available Functions for the Help Viewer.
  - Input Recording Functions
  - Mapping Functions
    - "clear" (mapping::clear)
      Empties the mapping.
    - "contains"(mapping::contains)
      Returns true if the key is already in the mapping.
    - "count" (mapping::count)
      Returns the number of keys.
    - "insert" (mapping::insert)
      Insert a key/value pair.
    - "isEmpty" (mapping::isEmpty)
      Returns true if the mapping is empty.
    - "keys" (mapping::keys)
      Returns a list containing all the keys in a mapping in an arbitrary order.
    - "keyAt" (mapping::keyAt)
      Returns the key at the given index position.
    - "merged" (mapping::merged)
      This function creates a new instance by merging two mappings.
    - "remove" (mapping::remove)
      Removes the key and the associated value.
    - "value" (mapping::value)
      Returns the value at given key or the defaultValue if the key is not found.
    - "values"(mapping::values)
      Returns a list containing all values in a mapping, in an arbitrary order. The order is the same as that used by keys().
    - "valueAt" (mapping::valueAt)
      Returns the value at the given index position.
  - Mathematical Functions
  - MindSphere Connector Functions
  - Miscellaneous Functions
  - Multilingual Functionality
  - Project administration Functions
  - Query Functions
  - Redu/Dist Functions
  - Reference - Focus Policy - Functions
  - Selection and Configuration Dialogs - Functions
  - Semaphore Functions
  - String Functions
  - Time Functions
  - Threads Functions
  - User Administration Functions
  - Vector / Dynamic arrays - Functions
  - Waiting Control Functions
  - Window Functions
  - XML Control Extension Functions
- Control graphics
- CONTROL Functions
- CtrlExtension
  The CtrlExtension allows the addition of custom C++ code.
- CTRL Debugger
  You can use the CTRL debugger to debug the Control programming language. The debugger can be used via its own panel, which also enables the monitoring and setting of variable values during the execution of a script.
- SQL in CONTROL
  The database functions enable you to quickly carry out value queries on data points and elements.
- WinCC OA JavaScript Manager for Node.js
  The WinCC OA JavaScript Manager for Node.js is a manager that allows for the integration of the TypeScript/JavaScript runtime environment Node.js® into WinCC OA.
- API Manager
  The WinCC OA API (Application Programming Interface) offers a number of functions adding special Managers to this process control system.
- NextGen Archiver Backend-API
  This chapter describes the NextGen Archiver Backend API
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Useful tools and enhancements for special demands.
Reference Tables
Detailed and extensive content for special project adaptation.
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Basic information about terms and functions within the documentation.
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"isEmpty" (mapping::isEmpty)

Returns true if the mapping is empty.

Synopsis

int mapping.isEmpty();

Parameters


Parameter	Description
-	-

Details

Assignment

Mapping Functions