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Business Logic / Control
Endless possibilities in data processing for your projects.
Types of Control Functions
An overview of the types of functions distinguished within Control.
Vector / Dynamic arrays - Functions
"isEmpty" (vector::isEmpty / dyn_*::isEmpty)
Returns true if the vector / dyn_* 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
  - Mathematical Functions
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  - Miscellaneous Functions
  - Multilingual Functionality
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  - Query Functions
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  - Reference - Focus Policy - Functions
  - Selection and Configuration Dialogs - Functions
  - Semaphore Functions
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  - Time Functions
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  - User Administration Functions
  - Vector / Dynamic arrays - Functions
    - "append" (vector:: append / dyn_*::append)
    - "at" (vector:: at / dyn_*::at)
      Returns a reference to the element at the given idx out of the vector/dyn_*.
    - "clear" (vector:: clear / dyn_*::clear)
      Empties the vector/dyn_*.
    - "contains" (vector:: contains / dyn_*::contains)
      Returns true if an element is equal to the given value or false if not found.
    - "count" (vector:: count / dyn_*::count)
      Returns the number of elements in the vector / dyn_*.
    - "first" (vector::first / dyn_*::first)
      Returns a reference to the first element of the vector/dyn_*.
    - "indexListOf" (vector::indexListOf / dyn_*::indexListOf)
      Returns a list of indexes at which the given value was found.
    - "indexOf" (vector::indexOf / dyn_*::indexOf)
      Returns the index of the first element which is equal to the given value. The search starts at the given index.
    - "insertAt" (vector::insertAt / dyn_*::insertAt)
    - "isEmpty" (vector::isEmpty / dyn_*::isEmpty)
      Returns true if the vector / dyn_* is empty.
    - "last" (vector::last / dyn_*::last)
      Returns a reference to the last element of the vector/dyn_*.
    - "prepend" (vector::prepend / dyn_*::prepend)
      Insets the given value as the first element of the vector/dyn_*.
    - "removeAt" (vector::removeAt / dyn_*::removeAt)
      Removes the element at given index. The vector /dyn_* has one element less after this.
    - "replaceAt" (vector::replaceAt / dyn_*::replaceAt)
      Replaces the value at the given idx position with the given value.
    - "sort" (vector::sort / dyn_*::sort)
      Sorts the array.
    - "takeAt" (vector::takeAt / dyn_*::takeAt)
      Takes the element at the given idx out of the vector/dyn_* and returns its value. The vector/dyn_* has one element less after this.
    - "takeFirst" (vector::takeFirst / dyn_*::takeFirst)
      Takes the first element out of the vector/dyn_* and returns its value. The vector/dyn_* has one element less after this.
    - "takeLast" (vector::takeLast / dyn_*::takeLast)
      Takes the last element out of the vector/dyn_* and returns its value. The vector/dyn_* has one element less after this.
    - "unique" (vector::unique / dyn_*::unique)
      Removes all duplicate elements in an array.
  - 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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Basic information about terms and functions within the documentation.
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"isEmpty" (vector::isEmpty / dyn_*::isEmpty)

Returns true if the vector / dyn_* is empty.

Synopsis

bool vector.isEmpty();

Parameters


Parameter	Description
-	-

Details

Assignment

Vector / Dynamic arrays - Functions