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📘 SPR Stack Operations Manual
This guide provides a comprehensive overview of Stack operations in SPR, explaining what they are, how to use them, and why they are a powerful tool for scripting. Whether you're a beginner or an experienced user, this manual will help you master Stack operations with clear explanations and practical examples. Let’s dive in! 🚀
•What is a Stack?
•Stack Commands Overview
•Code Examples
•Illustrations
A Stack in SPR is a linear data structure that follows the Last In, First Out (LIFO) principle. This means that the last element added to the stack will be the first one to be removed. Think of it as a stack of plates: you add plates to the top and remove plates from the top.
Stacks are used in various scenarios, including:
1.Function call management (e.g., recursion)
2.Expression evaluation (e.g., parsing)
3.Backtracking algorithms (e.g., depth-first search)
Here’s a quick overview of the most common ARS commands for Stack operations:
' Pushes an element onto the stack.
ARS.StkPush|$$ARS|Value
' Pops the top element from the stack.
ARS.StkPop|$$ARS|$$RES
' Peeks at the top element of the stack without removing it.
ARS.StkPeek|$$ARS|$$RES
' Checks if the stack is empty.
ARS.StkIsEmpty|$$ARS|$$RES
' Returns the number of elements in the stack.
ARS.StkCount|$$ARS|$$RES
' Clears all elements from the stack.
ARS.StkClear|$$ARS
Here are some practical examples of using Stack operations in SPR:
' Push elements onto the stack.
ARS.StkPush|$$ARS|10
ARS.StkPush|$$ARS|20
ARS.StkPush|$$ARS|30
' Pop the top element from the stack.
ARS.StkPop|$$ARS|$$RES
' Peek at the top element of the stack.
ARS.StkPeek|$$ARS|$$RES
Below is an illustration of how a stack operates using Unicode characters:
Stack Operations Illustration
Initial Stack:
+---+
| 3 |
+---+
| 2 |
+---+
| 1 |
+---+
Push Operation (Adding 4 to the stack):
+---+
| 4 |
+---+
| 3 |
+---+
| 2 |
+---+
| 1 |
+---+
Pop Operation (Removing the top element, 4):
+---+
| 3 |
+---+
| 2 |
+---+
| 1 |
+---+
Peek Operation (Viewing the top element, 3):
+---+
| 3 |
+---+
| 2 |
+---+
| 1 |
+---+