Priority queues allow elements to be inserted and removed based on priority rather than order. Elements with highest priority move to the front. Heaps can implement priority queues efficiently, allowing insert and remove maximum in O(log N) time. A max priority queue uses a max heap structure, returning and removing the maximum element and maintaining the heap properties during updates.
Describes basic understanding of priority queues, their applications, methods, implementation with sorted/unsorted list, sorting applications with insertion sort and selection sort with their running times.
queue datastructure made easy and datastructure explained in java. visit http://technoexplore.blogspot.com and http://hotjobstuff.blogspot.com for some other important presentations.
Describes basic understanding of priority queues, their applications, methods, implementation with sorted/unsorted list, sorting applications with insertion sort and selection sort with their running times.
queue datastructure made easy and datastructure explained in java. visit http://technoexplore.blogspot.com and http://hotjobstuff.blogspot.com for some other important presentations.
( ** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ** )
This Edureka tutorial on “Java ArrayList” (Java blog series: https://goo.gl/osrGrS) will give you a brief insight about ArrayList in Java and its various constructors and methods along with an example. Through this tutorial, you will learn the following topics:
Collections Framework
Hierarchy of ArrayList
What is ArrayList
Internal Working of ArrayList
Constructors of ArrayList
Constructors Example
ArrayList Methods
Methods Example and Demo
Advantages of ArrayList over Arrays
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Check out our complete Youtube playlist here: https://goo.gl/CRbgFann
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Stream concept is introduced in java 1.8 and present in java.util.stream package.It is used to process the object from collection or any group of objects or data source.
Arguments is an Array-like object accessible inside functions that contains the values of the arguments passed to that function.
To know more, talk2us@ideas2it.com or visit www.ideas2it.com
Quicksort Algorithm..simply defined through animations..!!Mahesh Tibrewal
I've seen many ppts on Quicksort algorithm which are very good but fail to maintain simplicity and clarity. So, I've prepared a very simple ppt for students to understand the operation in a better way.
( ** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ** )
This Edureka tutorial on “Java ArrayList” (Java blog series: https://goo.gl/osrGrS) will give you a brief insight about ArrayList in Java and its various constructors and methods along with an example. Through this tutorial, you will learn the following topics:
Collections Framework
Hierarchy of ArrayList
What is ArrayList
Internal Working of ArrayList
Constructors of ArrayList
Constructors Example
ArrayList Methods
Methods Example and Demo
Advantages of ArrayList over Arrays
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/CRbgFann
Follow us to never miss an update in the future.
Instagram: https://www.instagram.com/edureka_learning/
Facebook: https://www.facebook.com/edurekaIN/
Twitter: https://twitter.com/edurekain
LinkedIn: https://www.linkedin.com/company/edureka
Stream concept is introduced in java 1.8 and present in java.util.stream package.It is used to process the object from collection or any group of objects or data source.
Arguments is an Array-like object accessible inside functions that contains the values of the arguments passed to that function.
To know more, talk2us@ideas2it.com or visit www.ideas2it.com
Quicksort Algorithm..simply defined through animations..!!Mahesh Tibrewal
I've seen many ppts on Quicksort algorithm which are very good but fail to maintain simplicity and clarity. So, I've prepared a very simple ppt for students to understand the operation in a better way.
Insert works in constant time for either end of a linked list. Remove works in constant time only. Seems best that head of the linked list be the front of the queue so that all removes will be from the front. Inserts will be at the end of the list
Queue is a Linear list which has two ends, one for insertion of elements and other for deletion of elements. The first end is called 'Rear' and the later is called 'Front'. Elements are inserted from Rear End and Deleted from Front End. Queues are called First In First Out (FIFO) List, since the first element in a queue will be the first element out of the queue. In other words, the order in which the elements enter a queue is the order in which they leave.
In Batch Processing the jobs are "Queued up" as they are read in and executed, one after another in the order they were received. This ignores the possible existence of priorities.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
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The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
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In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
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Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
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This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
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The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
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Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
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Key Trends Shaping the Future of Infrastructure.pdf
Priorty queue
1. Priority Queue:
Priority Queue is similar to queue where we insert an element from the back and remove
an element from front, but with a one difference that the logical order of elements in the
priority queue depends on the priority of the elements. The element with highest priority
will be moved to the front of the queue and one with lowest priority will move to the back
of the queue. Thus it is possible that when you enqueue an element at the back in the
queue, it can move to front because of its highest priority.
Example:
Let’s say we have an array of 5 elements : {4, 8, 1, 7, 3} and we have to insert all the
elements in the max-priority queue.
First as the priority queue is empty, so 4 will be inserted initially.
Now when 8 will be inserted it will moved to front as 8 is greater than 4.
While inserting 1, as it is the current minimum element in the priority queue, it will
remain in the back of priority queue.
Now 7 will be inserted between 8 and 4 as 7 is smaller than 8.
Now 3 will be inserted before 1 as it is the 2nd minimum element in the priority queue. All
the steps are represented in the diagram below:
Naïve Approach:
Suppose we have N elements and we have to insert these elements in the priority
queue. We can use list and can insert elements in O(N) time and can sort them to
maintain a priority queue in O(N logN ) time.
2. Efficient Approach:
We can use heaps to implement the priority queue. It will take O(log N) time to insert
and delete each element in the priority queue.
Based on heap structure, priority queue also has two types max- priority queue and min
- priority queue. Max Priority Queue is based on the structure of max heap and can
perform following operations: maximum(Arr) : It returns maximum element from the Arr.
extract_maximum (Arr) - It removes and return the maximum element from the Arr.
increase_val (Arr, i , val) - It increases the key of element stored at index i in Arr to new
value val. insert_val (Arr, val ) - It inserts the element with value val in Arr.
Implementation:
length = number of elements in Arr.
Maximum :
int maximum(int Arr[ ])
{
return Arr[ 1 ]; //as the maximum element is the root element in
the max heap.
}
Complexity: O(1)
Extract Maximum: In this operation, the maximum element will be returned and the
last element of heap will be placed at index 1 and max_heapify will be performed on
node 1 as placing last element on index 1 will violate the property of max-heap.
int extract_maximum (int Arr[ ])
{
if(length == 0)
{
cout<< “Can’t remove element as queue is empty”;
return -1;
}
int max = Arr[1];
Arr[1] = Arr[length];
length = length -1;
max_heapify(Arr, 1);
return max;
}
Complexity: O(logN).
3. Increase Value: In case increasing value of any node, may violate the property of
max-heap, so we will swap the parent’s value with the node’s value until we get a larger
value on parent node.
void increase_value (int Arr[ ], int i, int val)
{
if(val < Arr[ i ])
{
cout<<”New value is less than current value, can’t be inserted”
<<endl;
return;
}
Arr[ i ] = val;
while( i > 1 and Arr[ i/2 ] < Arr[ i ])
{
swap|(Arr[ i/2 ], Arr[ i ]);
i = i/2;
}
}
Complexity : O(log N).
Insert Value :
void insert_value (int Arr[ ], int val)
{
length = length + 1;
Arr[ length ] = -1; //assuming all the numbers greater than 0 are to be
inserted in queue.
increase_val (Arr, length, val);
}
Complexity: O(log N).
Example:
Initially there are 5 elements in priority queue.
Operation: Insert Value(Arr, 6)
In the diagram below, inserting another element having value 6 is violating the property
of max-priority queue, so it is swapped with its parent having value 4, thus maintaining
the max priority queue.
4. Operation: Extract Maximum:
In the diagram below, after removing 8 and placing 4 at node 1, violates the property of
max-priority queue. So max_heapify(Arr, 1) will be performed which will maintain the
property of max - priority queue.
As discussed above, like heaps we can use priority queues in scheduling of jobs. When
there are N jobs in queue, each having its own priority. If the job with maximum priority
will be completed first and will be removed from the queue, we can use priority queue’s
operation extract_maximum here. If at every instant we have to add a new job in the
queue, we can use insert_value operation as it will insert the element in O(log N) and
will also maintain the property of max heap.