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Iterators

Function

An iterative operation must be driven by an enumeration , or at least stopped at some point by a given condition . In an OMLoop, this control is enabled by four iterators :

• Forloop

• Whileloop

• Listloop

• OnListloop

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Iterators can enumerate items in lists, but above all, they can stop the OMloop once this enumeration is over. This is why a loop must always have at least one iterator : otherwise, it goes on with infinite iterations.

If several iterators are used simultaneously, the loop stops as soon as one of them stops.

Adding Iterators

To add an iterator in the editor :

• click on the icon on top of the window

• Cmd click and type a name.

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All the examples provided here make use the eachtime and finally evaluators of OMLoop :

• Evaluators : Eachtime, Finally, Initdo

References :

Contents :

• OpenMusic Documentation
• OM User Manual
  • Introduction
  • System Configuration and Installation
  • Going Through an OM Session
  • The OM Environment
  • Visual Programming I
  • Visual Programming II
    • Abstraction
    • Evaluation Modes
    • Higher-Order Functions
    • Control Structures
    • Iterations: OMLoop
      • Iteration
      • General Features
      • Evaluators
      • Iterators
        • List Loop
        • OnList Loop
        • For Loop
        • While Loop
        • Infinite Loops
      • Accumulators
      • Example : A Random Series
    • Instances
    • Interface Boxes
    • Files
  • Basic Tools
  • Score Objects
  • Maquettes
  • Sheet
  • MIDI
  • Audio
  • SDIF
  • Lisp Programming
  • Errors and Problems
• OpenMusic QuickStart

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