Data-Structures | Data Structures and Algorithims for Interview Preperation | Learning library

 by   reach2arunprakash Java Version: Current License: Apache-2.0

kandi X-RAY | Data-Structures Summary

kandi X-RAY | Data-Structures Summary

Data-Structures is a Java library typically used in Tutorial, Learning applications. Data-Structures has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

Very useful to understand the basics and to write better code. In one sentence: As the size of your job goes up, how much longer does it take to complete it? # Big O Notation. The loop executes N times, so the sequence of statements also executes N times. If we assume the statements are O(1), the total time for the for loop is N * O(1), which is O(N) overall. The outer loop executes N times. Every time the outer loop executes, the inner loop executes M times. As a result, the statements in the inner loop execute a total of N * M times. Thus, the complexity is O(N * M). In a common special case where the stopping condition of the inner loop is J < N instead of J < M (i.e., the inner loop also executes N times), the total complexity for the two loops is O(N2). What is the average case Big O of linear search in an array with N items, if an item is present? O(N) O(N2) O(1) O(logN) O(NlogN).

            kandi-support Support

              Data-Structures has a low active ecosystem.
              It has 24 star(s) with 21 fork(s). There are 1 watchers for this library.
              It had no major release in the last 6 months.
              Data-Structures has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Data-Structures is current.

            kandi-Quality Quality

              Data-Structures has 0 bugs and 0 code smells.

            kandi-Security Security

              Data-Structures has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              Data-Structures code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              Data-Structures is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              Data-Structures releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.
              Data-Structures saves you 606 person hours of effort in developing the same functionality from scratch.
              It has 1411 lines of code, 86 functions and 14 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed Data-Structures and discovered the below as its top functions. This is intended to give you an instant insight into Data-Structures implemented functionality, and help decide if they suit your requirements.
            • Demonstrates how to display a simple merge routine
            • Merge two arrays
            • Internal merge sort algorithm
            • Sample the two arrays
            • Print the given array
            • Quick sort algorithm
            • Swaps the elements of two arrays
            • Partition a partition
            • Test program entry point
            • Add an item
            • Removes the element at the specified index
            • Increases the size and reallocate the data
            • Prints the array
            • Sort the array in ascending order
            • Sample insertion method
            • Inserts an element in the loop
            • Print the binary tree
            • Add a new node
            • Finds a node in the tree
            • Prints the contents of the given array
            • Finds the smallest element in an array starting from a given startIndex
            • Prints the bubble sort
            • Sort the array
            • Returns a string representation of this node
            • Returns the value associated with the given key
            Get all kandi verified functions for this library.

            Data-Structures Key Features

            No Key Features are available at this moment for Data-Structures.

            Data-Structures Examples and Code Snippets

            No Code Snippets are available at this moment for Data-Structures.

            Community Discussions


            munmap_chunk(): invalid pointer Error while making an Array data structure in C++
            Asked 2021-Jun-03 at 07:43

            I tried going through many similar questions regarding munmap_chunk(): invalid pointer errors, but I'm stuck as to what to do. I tried adding free commands too.

            I'm a C++ novice and normally use Python and Java, so the whole concept of pointers and memory management are new to me. It would be great if someone can explain what I'm doing wrong.

            Here is my code for my Array class for a generic T:



            Answered 2021-Jun-03 at 07:39

            Thanks to @S.M. @anastaciu and @jkb for their guidance.

            The original code posted here was:



            How does recursion work in a Countdown function
            Asked 2021-Jun-01 at 18:00

            I'm learning a bit of JavaScript, but I'm having hard time understanding the lesson on FreeCodeCamp about the recursion countdown (link).

            In the lesson, there this initial example. But I'm confused on how it operates:



            Answered 2021-Jun-01 at 17:26

            Here what the array looks like inside of each function call if this helps:



            Batch array, associative array, and how to navigate in array
            Asked 2021-May-21 at 08:21

            How can I call in batch a multiple level of array ?

            I want to create an array of unique value with multiples data, then I will manage to make an associative array after unyfing the values.

            I have a csv file with lot of value like this :



            Answered 2021-May-21 at 08:21

            when a variable that requires delayed expansion to access is composed of additional delayed variables, an additional for loop can be used to access sub variables:



            Get the mininum value from a hash table and assign its key to an object
            Asked 2021-May-06 at 07:22

            this is a very small piece of code taken from this book about the Dijkstra Algorithm in Ruby: I think I can't post the entire example for copyright issue, so if you want you can download the source code from the above link of the book, the file will be in the folder jwdsal2-code\code\connecting_everything_with_graphs\dijkstra.rb. - it runs perfectly and there isn't any error in the code.

            The excerpt from the code is the following:



            Answered 2021-May-06 at 07:22

            Your solution is almost correct.

            You assign the name of the city to the current_city variable whereas the original solution assigns the city object.



            Creating directories with OS module
            Asked 2021-May-02 at 20:38

            Hi there I'm trying to create a small tool that will create child directory's within the Root directory

            Root Dir(python) And child Dir(DS, WEB, Flask, Learn) stuff like that

            At starting I have done it statically Here is the Code



            Answered 2021-May-02 at 20:38

            To prompt the user, you can create a small function which ask for the user to enter values in order.

            For example:



            Can't parse data from json
            Asked 2021-Apr-13 at 17:08

            I'm trying to display a stacked bar chart on my web page, but it's not working.

            I've tried to follow the documentation about data structure, but it seems not working. The two data are made from an Ajax call and built in js.


            I've made a jsfiddle if you want to look at what I've done.




            Answered 2021-Apr-13 at 17:08

            So after, investigating styles and formatting, it was just a problem of versions. The parse options were not present in version 2.8.



            what's the point of DMA proxy. Or can we use kernel data structures in userspace which makes no sense
            Asked 2021-Apr-11 at 13:15

            I was studying DMA proxy and DMA proxy channels. Basically they are like letting Userspace application to write tx, read rx kernel data-structures. and let the device to access virtual memory data structures since devices understand physical addresses.

            This code

            and this article that I am reading

            And from this Thesis it says this

            in Linux the kernel uses virtual memory address but most hardware systems use physical address for bus addressing. For hardware to be able to access data structures residing in kernel virtual memory space these structures have to be mapped to physical memory address. Its not sufficient to use simple address conversion methods since some system memory management unit have to be re-programmed and bounce buffers have to be used (probably in system memory management unit -- please clarify).

            I think I have some grasp of dma proxy drivers and associated Userspace application(What I am guessing is it is used in embedded Linux systems).

            But What's the point of all of this for example if I am looking at NIC card, then whatever I suppose to get with the mmap call in Userspace application and Kernel implementation of MMAP in proxy driver will have kernel data structure. in case of NIC card the RX/TX will be the device specific data structures representation in kernel memory space since geting struct ethhdr / struct iphdr / struct tcphdr / etc. from return of mmap is not possible since the above paragraph from thesis says conversion of virtual addresses to Userspace addresses is probably not possible (basically it says physical address. I am assuming this from the text read )

            So basically I am not fully getting the use of dma proxy drivers. I need some explanation to clear this out and how can the return of mmap calls be used in applications i.e. server applications in embedded Linux systems



            Answered 2021-Apr-11 at 13:15

            What's the point of all of this for example if I am looking at NIC card, then whatever I suppose to get with the mmap call in Userspace application and Kernel implementation of MMAP in proxy driver will have kernel data structure.

            What do kernel data structures have to do with it? If you are using DMA to get data from a NIC then surely you are getting raw data (ethernet frames, for example). The layout of such data is defined by the applicable network protocol and whatever higher-level protocols apply to the payload.

            The kernel sources do define C structure types whose layouts map the fields of ethernet headers, IP headers, TCP headers, etc, but these follow the externally-defined layout of the data, not the other way around.

            in case of NIC card the RX/TX will be the device specific data structures representation in kernel memory space

            The formats of network transmissions are not device-specific (generally speaking).

            since geting struct ethhdr / struct iphdr / struct tcphdr / etc. from return of mmap is not possible since the above paragraph from thesis says conversion of virtual addresses to Userspace addresses is probably not possible (basically it says physical address. I am assuming this from the text read)

            Irrelevant (see above). Nevertheless, the quoted thesis excerpt says nothing at all like what you describe. It's not talking about user space versus kernel space at all, but rather about hardware programming interfaces vs kernel code. It is expressing some of the complications involved in writing (kernel-space) drivers.

            how can the return of mmap calls be used in applications

            The driver provides an interface to userspace in the form of a character device. Mmapping an appropriate range of bytes from that device into a program's memory space provides access to whatever data the driver exposes that way. In the case of an interface for DMA, that would presumably be the contents of the (physical) memory involved in the DMA transfer.



            Creating a Series from a list of dictionaries
            Asked 2021-Mar-29 at 01:52

            I have the following list:



            Answered 2021-Mar-29 at 01:52

            All you need is pd.Series(dictionary_variable)

            As the example you shown, I provide this code for your problem, hope to be helpful:



            Subclassing pandas dataframe and setting field in constuctor
            Asked 2021-Mar-26 at 20:43

            I'm trying to subclass pandas data structure. If I set a field on the instance, it works fine.



            Answered 2021-Mar-26 at 20:43

            Your current version creates scheme as an attribute (like .index, .columns):



            Min Heap Problem After Extracting Minimum Element
            Asked 2021-Feb-24 at 21:30

            I'm working on a min heap implementation and am really new to the concept.

            Using this as reference:

            I modified the code and came up with:

            (this is the code I'm having problems with, all other code is irrelevant to my problem, at least so I think)



            Answered 2021-Feb-24 at 21:28

            The problem is the line node[0] = node[*n - 1]; in extractKey. That is setting two of your node pointers to the same value, so you no longer have 100 unique node pointers. (As a consequence, it is also leaking memory.) Changing the line to swap(&node[0], &node[*n - 1]); should solve the problem.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install Data-Structures

            You can download it from GitHub.
            You can use Data-Structures like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Data-Structures component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            General - Find the most frequent integer in an array - Find pairs in an integer array whose sum is equal to 10 (bonus: do it in linear time) - Given 2 integer arrays, determine of the 2nd array is a rotated version of the 1st array. Trees - Implement a BST with insert and delete functions - Print a tree using BFS and DFS - Write a function that determines if a tree is a BST - Find the smallest element in a BST - Find the 2nd largest number in a BST - Given a binary tree which is a sum tree (child nodes add to parent), write an algorithm to determine whether the tree is a valid sum tree - Find the distance between 2 nodes in a BST and a normal binary tree - Print the coordinates of every node in a binary tree, where root is 0,0 - Print a tree by levels - Given a binary tree which is a sum tree, write an algorithm to determine whether the tree is a valid sum tree - Given a tree, verify that it contains a subtree. - Convert binary tree to doubly linked list - HARD: Find the max distance between 2 nodes in a BST. - HARD: Construct a BST given the pre-order and in-order traversal Strings. Stacks, Queues, and Heaps - Implement a stack with push and pop functions - Implement a queue with queue and dequeue functions - Find the minimum element in a stack in O(1) time - Write a function that sorts a stack (bonus: sort the stack in place without extra memory) - Implement a binary min heap. Turn it into a binary max heap - HARD: Implement a queue using 2 stacks. Linked Lists - Implement a linked list (with insert and delete functions) - Find the Nth element in a linked list - Remove the Nth element of a linked list - Check if a linked list has cycles - Given a circular linked list, find the node at the beginning of the loop. Sorting - Implement bubble sort - Implement selection sort - Implement insertion sort - Implement merge sort - Implement quick sort. Uncategorized - Given a max-heap, how do I find the top k items? - Find the border length created from a conglomeration of various 2D rectangles. - Write a minPeak function for a stack (function that returns the minimum element in the stack). - Find the nth fib number - Design a function in your favorite programming language to convert a camelCase string to all lowercase. - Implement a hashset - Given a corpus of valid words, design a function that takes a word as input and outputs all valid anagrams of that word. - Given an input of a 3D matrix of ones and zeros, count the number of contiguous 1-filled regions (as separated by 0-filled regions), as well as the size of the largest one (I think; doesn’t really change the problem much). - You have two sets. How would you know that they converge. - Given a bag of nuts and a bag of bolts, each having a different size within a bag but exactly one match in the other bag, give a fast algorithm to find all matches - Preorder traversal without recursion - Find the largest possible difference in an array of integers, such that the smaller integer occurs earlier in the array. - How to find if n numbers in a list sum up to an integer k? - Find largest palindrome in string - Make an anagram solver that returns all valid dictionary words given a set of characters. - Sort a string by the order it’s characters appear in another string - Given a value k and an array , design an efficient algorithm that should output the number of pairs that sum up to k. - How do you find three numbers that sum to 0? (in a list). Now can you do it under O(n^3)? - Given a Fibonacci number, tell us which index it occurs at. - Describe an algorithm that would find n numbers in a list that sum to 0. - Given an array of n unsorted ints, with the condition that each number is at most k positions away from its final sorted position, give an efficient sorting algorithm - Give an efficient solution for subset sum. - Given two (i,j) coordinates of a cell in two dimensional matrix. These coordinates are the lower left and upper right corner of a rectangle contained within the matrix. Sum all the elements in the matrix. Time and space? - String has all unique characters - Two strings to see if one is a permutation - Remove dups from an unsorted linked list - Find kth algorithm of singly linked list - Delete a node in the middle of a singly linked list given access to that node - Write code to partition a linked list around a value x such that all nodes less than x come before all nodes greater than or equal to x - Single array to implement three stacks - Stack with min element - Towers of Hanoi - Queue using two stacks - Sort a stack in ascending order using at most one additional stack to hold items but you may not copy the elements into any other data structure - Function to see if a tree is balanced - Graph algorithm, route between two nodes - Create bst from sorted array with minimal height - Binary tree is a bst - A child is running up a staircase with n steps, and cah hop either 1 step, 2 steps, or 3 steps at a time. Implement a method to count how many possible ways the child can run up the stairs - Two sorted arrays, A has a large enough buffer at the end to hold B, merge B into A in sorted order - Write a method to sort an array of strings so that all the anagrams are next to each other - Find an element in a sorted array that has been rotated an unknown number of times - Implement a method that returns true if the edit distance between two strings is less than 2 (1 or 0) or false otherwise - Given two lists of chars, return the first with removed characters that appear in the second list.
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
          • HTTPS


          • CLI

            gh repo clone reach2arunprakash/Data-Structures

          • sshUrl


          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Explore Related Topics

            Consider Popular Learning Libraries


            by freeCodeCamp


            by CyC2018


            by TheAlgorithms


            by kdn251

            Try Top Libraries by reach2arunprakash


            by reach2arunprakashPython


            by reach2arunprakashHTML


            by reach2arunprakashHTML


            by reach2arunprakashHTML


            by reach2arunprakashHTML