DoubleDoubleProcedure (Colt 1.2.0 - API Specification)
Keywords: cern.colt.function.DoubleDoubleProcedure interface

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## cern.colt.function
Interface DoubleDoubleProcedure

public interface DoubleDoubleProcedure

Interface that represents a procedure object: a procedure that takes two arguments and does not return a value.

Method Summary
`boolean` | `apply(double first, double second)` Applies a procedure to two arguments.

Method Detail

### apply

    public boolean apply(double first,
                         double second)

  Applies a procedure to two arguments. Optionally can return a boolean flag to inform the object calling the procedure.

  Example: forEach() methods often use procedure objects. To signal to a forEach() method whether iteration should continue normally or terminate (because for example a matching element has been found), a procedure can return `false` to indicate termination and `true` to indicate continuation.

  Parameters:
    `first` - first argument passed to the procedure.
    `second` - second argument passed to the procedure.
  Returns:
    a flag to inform the object calling the procedure.

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