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What is the main difference between stack and array?
ArrayIt is a data structure that has group of same type elements in linear sequence. It requires continuous memory block to store it. Elements in Array is accessed by index. Array does not have any predefined functions.StackIt is a data structure that is a list of ordered elements. In most of the programming languages and computer architecture stack has limitation in size. Elements in stack might not be the same type. Stack has predefined functions: POP (get top element), PUSH (put element on top) and it works by LIFO(Last In First Out) principle. Elements from stack are removed in reverse order to the order of their addition.Example:POP 1;POP 2;POP 3;Stack: (top) 3 2 1 (bottom)PUSHPUSHPUSHWe get elements in this order: 3 2 1
How do you reverse the order of element on stack by using one additional stack and some additional non array variables?
You pop elements off of one stack and push them onto the other. This reverses the order of the elements. while ((element = pop(stack1)) != NULL) push(stack2, element);
An algorithm to Reversing the order of elements on stack S using 1 additional stacks?
// stack to contain content Stack sourceStack = new Stack(); // ... fill sourceStack with content // stack to contain reversed content Stack targetStack = new Stack(); while (!sourceStack.empty()) { targetStack.push(sourceStack.pop()); } // targetStack contains the reversed content of sourceStack
What is the operation of delete in stack?
Delete is mostly commonly known as pop in stack. The last element inserted into the stack is removed from the stack. Here is an illustration:Consider the stack with the elements 1,2,3,4 inserted in order.1->2->3->4\topThe top of the stack will be pointing to 4. When pop operation is performed, 4 is removed from the stack and the top is made to point to 3. The stack then becomes:1->2->3\top
Why filo is not used in stack?
FILO is an acronym of "first in last out". If we imagine a stack of plates, the first plate is at the bottom of the stack and is therefore the last to be removed from the stack. Thus FILO is used when referring to a stack. We use a stack when we wish to process elements in the reverse order they arrive, always processing the newest arrival first. Stacks are useful in backtracking algorithms and are a fundamental aspect of the call-and-return mechanism. FIFO, on the other hand, is an acronym of "first in first out" and is synonymous with "first come, first served". As such, FIFO applies to queues rather than stacks. We use a queue when we wish to process elements in the same order they arrive.
What is the main difference between stack and array?
ArrayIt is a data structure that has group of same type elements in linear sequence. It requires continuous memory block to store it. Elements in Array is accessed by index. Array does not have any predefined functions.StackIt is a data structure that is a list of ordered elements. In most of the programming languages and computer architecture stack has limitation in size. Elements in stack might not be the same type. Stack has predefined functions: POP (get top element), PUSH (put element on top) and it works by LIFO(Last In First Out) principle. Elements from stack are removed in reverse order to the order of their addition.Example:POP 1;POP 2;POP 3;Stack: (top) 3 2 1 (bottom)PUSHPUSHPUSHWe get elements in this order: 3 2 1
How can you implement a queue using stacks efficiently?
To implement a queue using stacks efficiently, you can use two stacks. One stack is used for enqueueing elements, and the other stack is used for dequeueing elements. When dequeueing, if the dequeue stack is empty, you can transfer elements from the enqueue stack to the dequeue stack to maintain the order of elements. This approach allows for efficient implementation of a queue using stacks.
How can I efficiently use a stack to sort elements in a data structure?
To efficiently use a stack to sort elements in a data structure, you can follow these steps: Push all elements into the stack. Create a temporary stack to store the sorted elements. While the original stack is not empty, pop an element from the original stack. Compare the popped element with the top element of the temporary stack. If the popped element is greater, push it onto the temporary stack. If the popped element is smaller, keep popping elements from the temporary stack and pushing them back onto the original stack until the temporary stack is empty or the top element is greater. Repeat steps 3-6 until the original stack is empty. The elements in the temporary stack will now be sorted in ascending order. By following these steps, you can efficiently use a stack to sort elements in a data structure.
How can one convert a deterministic finite automaton (DFA) to a pushdown automaton (PDA)?
To convert a deterministic finite automaton (DFA) to a pushdown automaton (PDA), you need to add a stack to keep track of the state transitions. The PDA uses the stack to store and retrieve symbols, allowing for more complex computations than a DFA. This conversion involves modifying the transition functions and adding stack operations to handle the additional complexity of the PDA.
How do you reverse the order of element on stack by using one additional stack and some additional non array variables?
You pop elements off of one stack and push them onto the other. This reverses the order of the elements. while ((element = pop(stack1)) != NULL) push(stack2, element);
An algorithm to Reversing the order of elements on stack S using 1 additional stacks?
// stack to contain content Stack sourceStack = new Stack(); // ... fill sourceStack with content // stack to contain reversed content Stack targetStack = new Stack(); while (!sourceStack.empty()) { targetStack.push(sourceStack.pop()); } // targetStack contains the reversed content of sourceStack
How do you represent a stack?
A stack as in a software "pushdown stack" can be represented as an array with a count of how many elements are used. In JavaScript, you can simply initialize with A=[] and use A.push(newval) and A.pop() For example, type this in your browser's location box up top: javascript:a=[];a.push('i');a.push('h');alert(a.pop()+a.pop()) It puts h and then i on the stack, and then pops them off, in last-in-first-out (LIFO) order, and should say 'hi'. You can also represent a stack as a tree. An object store contains volatile (non-shared) objects and persistent (shared) objects. Both stacks contain references to objects. Non-algebraic operators act on the query result stack and the object store and affect the environment stack. Query evaluation takes the state of the environment stack and the state of the objects store and puts query results on the query result stack
What is the operation of delete in stack?
Delete is mostly commonly known as pop in stack. The last element inserted into the stack is removed from the stack. Here is an illustration:Consider the stack with the elements 1,2,3,4 inserted in order.1->2->3->4\topThe top of the stack will be pointing to 4. When pop operation is performed, 4 is removed from the stack and the top is made to point to 3. The stack then becomes:1->2->3\top
How can one construct a PDA (Pushdown Automaton) for a given language or grammar?
To construct a Pushdown Automaton (PDA) for a given language or grammar, one must define the states, transitions, and stack operations that correspond to the rules of the language or grammar. The PDA uses a stack to keep track of symbols and can push, pop, or read symbols based on the transitions between states. By carefully designing the PDA to follow the rules of the language or grammar, it can effectively recognize and accept strings that belong to the specified language.
Why filo is not used in stack?
FILO is an acronym of "first in last out". If we imagine a stack of plates, the first plate is at the bottom of the stack and is therefore the last to be removed from the stack. Thus FILO is used when referring to a stack. We use a stack when we wish to process elements in the reverse order they arrive, always processing the newest arrival first. Stacks are useful in backtracking algorithms and are a fundamental aspect of the call-and-return mechanism. FIFO, on the other hand, is an acronym of "first in first out" and is synonymous with "first come, first served". As such, FIFO applies to queues rather than stacks. We use a queue when we wish to process elements in the same order they arrive.
What are the important applications of stacks?
In computer science, a stack is an area of memory that holds all local variables and parameters used by any function, and remembers the order in which functions are called so that function returns occur correctly. Each time a function is called, its local variables and parameters are "pushed onto" the stack. When the function returns, these locals and parameters are "popped." Because of this, the size of a program's stack fluctuates constantly as the program is running, but it has some maximum size.One way of describing the stack is as a last in, first out (LIFO) abstract data type and linear data structure. A stack can have any abstract data type as anelement, but is characterized by two fundamental operations, called push and pop (or pull). The push operation adds a new item to the top of the stack, or initializes the stack if it is empty. If the stack is full and does not contain enough space to accept the given item, the stack is then considered to be in anoverflow state. The pop operation removes an item from the top of the stack. A pop either reveals previously concealed items, or results in an empty stack, but if the stack is empty then it goes into underflow state (It means no items are present in stack to be removed). A stack pointer is the register which holds the value of the stack. The stack pointer always points to the top value of the stack.A stack is a restricted data structure, because only a small number of operations are performed on it. The nature of the pop and push operations also means that stack elements have a natural order. Elements are removed from the stack in the reverse order to the order of their addition: therefore, the lower elements are those that have been on the stack the longest
What is the application of stack in computer science?
A stack is a series of storage locations for data or instructions. These can be popped off the stack as needed, and pushed down onto the stack to be stored. They can be accessed in a LIFO or FIFO fashion.
