Libraries.Robots.Lego.Utility Documentation
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)
Inherits from: Libraries.Language.Object
Summary
Actions Summary Table
Actions | Description |
---|---|
Compare(Libraries.Language.Object object) | This action compares two object hash codes and returns an integer. |
DelayMilliseconds(integer time) | This action pauses the execution of the robot's program temporarily. |
Equals(Libraries.Language.Object object) | This action determines if two objects are equal based on their hash code values. |
GetHashCode() | This action gets the hash code for an object. |
Actions Documentation
Compare(Libraries.Language.Object object)
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)
Parameters
- Libraries.Language.Object: The object to compare to.
Return
integer: The Compare result, Smaller, Equal, or Larger.
DelayMilliseconds(integer time)
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)
Parameters
- integer time: indicates how long, in milliseconds, the robot's program should wait before moving on to the next line of code.
Equals(Libraries.Language.Object object)
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)
Parameters
- Libraries.Language.Object: The to be compared.
Return
boolean: True if the hash codes are equal and false if they are not equal.
GetHashCode()
This action gets the hash code for an object.
Example Code
Object o
integer hash = o:GetHashCode()
Return
integer: The integer hash code of the object.