Libraries.Robots.Lego.Utility

This class is an object representation of the LEGO EV3 Mindstorms's miscellaneous capabilities. Currently, this is only used to pause the execution of a program of a robot.

Example Code

use Libraries.Robots.Lego.Utility
    use Libraries.Robots.Lego.Motor

    Utility utility
    Motor motor
    
    motor:SetSpeed(motor:MOTOR_B, 600)
    motor:RotateForward(motor:MOTOR_B)
    utility:DelayMilliseconds(1000)     //the program will wait 1 second before moving onto the next line of code, where the motor will then stop
    motor:Stop(motor:MOTOR_B)

This action compares two object hash codes and returns an integer. The result is larger if this hash code is larger than the object passed as a parameter, smaller, or equal. In this case, -1 means smaller, 0 means equal, and 1 means larger. This action was changed in Quorum 7 to return an integer, instead of a CompareResult object, because the previous implementation was causing efficiency issues.

Example Code

Object o
        Object t
        integer result = o:Compare(t) //1 (larger), 0 (equal), or -1 (smaller)

This action pauses the execution of the robot's program temporarily.

Example Code

use Libraries.Robots.Lego.Utility
    use Libraries.Robots.Lego.Sound
    use Libraries.Robots.Lego.Motor

    Utility utility
    Sound sound
    Motor motor
    
    motor:SetSpeed(motor:MOTOR_B, 720)
    motor:SetSpeed(motor:MOTOR_C, 720)      //two motors used to move the robot, connected to ports B and C
    motor:RotateForward(motor:MOTOR_B)
    motor:RotateForward(motor:MOTOR_C)
    repeat 5 times
        sound:Beep()
        utility:DelayMilliseconds(1000)      //wait a second in between beeps
    end
    motor:Stop(motor:MOTOR_B)   //because of the 1 seconds delay repeating 5 times, the motors get to run for 5 seconds
    motor:Stop(motor:MOTOR_C)

This action determines if two objects are equal based on their hash code values.

Example Code

use Libraries.Language.Object
        use Libraries.Language.Types.Text
        Object o
        Text t
        boolean result = o:Equals(t)

This action gets the hash code for an object.

Example Code

Object o
        integer hash = o:GetHashCode()