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MiniRobotLanguage (MRL)

 

LST.QuePop

Pop the First Value from the Queue

 

 

Intention

 

The LST.QuePop command is used to remove and retrieve the first value from the queue in a specified list container. This is a fundamental operation for managing data in a First-In-First-Out (FIFO) manner, where the first value added to the queue is the first one to be retrieved.

The queue is a data structure that allows you to store and retrieve values in a specific order. The LST.QuePop command removes the first value from the queue and optionally stores it in a variable.

 

 

Syntax

 

LST.QuePop|P1|P2

 

 

Parameter Explanation

 

P1 - The handle of the list container. This is a numeric value or a variable that contains the handle of the list.

P2 - (Optional) The variable to store the popped value. If omitted, the value is placed on the Top of Stack (TOS).

 

 

Example

 

'***********************************

' LST.QuePop Sample Script

'***********************************

' Create a new list container

LST.New|$$LST

' Add values to the queue

LST.QuePush|$$LST|10

LST.QuePush|$$LST|20

LST.QuePush|$$LST|30

' Pop the first value

LST.QuePop|$$LST|$$VAL1

' Display the popped value

DBP.$$VAL1

' Pop the next value

LST.QuePop|$$LST|$$VAL2

' Display the popped value

DBP.$$VAL2

' End the script

ENR.

 

 

Remarks

 

-

 

 

Limitations:

- If the queue is empty, the command will return an error or an empty value.

 

See also:

 

• LST.QuePush - Add a Value to the End of the Queue

• LST.QuePeek - Peek at the First Value in the Queue

• LST.New - Create a New List Container

• LST.End - End a List Container