data-structures | Common data structures and algorithms | Learning library

 by   JoeKarlsson JavaScript Version: Current License: MIT

kandi X-RAY | data-structures Summary

kandi X-RAY | data-structures Summary

data-structures is a JavaScript library typically used in Tutorial, Learning, Example Codes applications. data-structures has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

In simple terms, it is possible to say that an algorithm is a sequence of steps which allow to solve a certain task ( Yes, not just computers use algorithms, humans also use them). Now, an algorithm should have three important characteristics to be considered valid:.
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              data-structures has a low active ecosystem.
              It has 142 star(s) with 36 fork(s). There are 3 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. There are 2 open pull requests and 0 closed 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 MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

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              data-structures releases are not available. You will need to build from source code and install.
              Installation instructions are available. Examples and code snippets are not available.

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            data-structures Key Features

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            data-structures Examples and Code Snippets

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            Community Discussions

            QUESTION

            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:

            ...

            ANSWER

            Answered 2021-Jun-03 at 07:39

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

            The original code posted here was:

            Source https://stackoverflow.com/questions/67816624

            QUESTION

            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:

            ...

            ANSWER

            Answered 2021-Jun-01 at 17:26

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

            Source https://stackoverflow.com/questions/67793271

            QUESTION

            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 :

            ...

            ANSWER

            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:

            Source https://stackoverflow.com/questions/67628963

            QUESTION

            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:

            ...

            ANSWER

            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.

            Source https://stackoverflow.com/questions/67409336

            QUESTION

            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

            ...

            ANSWER

            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:

            Source https://stackoverflow.com/questions/67360618

            QUESTION

            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.

            https://www.chartjs.org/docs/latest/general/data-structures.html

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

            https://jsfiddle.net/batmine3/h4w02y5g/6/

            ...

            ANSWER

            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.

            Source https://stackoverflow.com/questions/67066707

            QUESTION

            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 https://github.com/mstuehn/dma_proxy/blob/master/dma_proxy_test.c

            and this article that I am reading https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842418/Linux+DMA+From+User+Space

            And from this Thesis http://www.diva-portal.org/smash/get/diva2:22746/FULLTEXT01.pdf 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

            ...

            ANSWER

            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.

            Source https://stackoverflow.com/questions/67042985

            QUESTION

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

            I have the following list:

            ...

            ANSWER

            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:

            Source https://stackoverflow.com/questions/66847771

            QUESTION

            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.

            ...

            ANSWER

            Answered 2021-Mar-26 at 20:43

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

            Source https://stackoverflow.com/questions/66647680

            QUESTION

            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:
            https://www.geeksforgeeks.org/building-heap-from-array/
            https://algorithmtutor.com/Data-Structures/Tree/Binary-Heaps/

            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)

            ...

            ANSWER

            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.

            Source https://stackoverflow.com/questions/66358034

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

            Vulnerabilities

            No vulnerabilities reported

            Install data-structures

            This repo covers the following topics:. An algorithm is a self-contained step-by-step set of operations to be performed. Algorithms perform calculation, data processing, and/or automated reasoning tasks.
            Run npm install
            Run npm test to run all of the algorithms
            Binary Heap
            Bitwise
            Complex Arrays
            Graph Traversing Breadth First Search Depth First Search
            Graph Graph Node Grid Graph Tree Node
            Hash Table
            Fast Fourier Transformations
            Linked Lists
            List
            Memoization
            Queue Prioroty Queue Queue
            Rabin Karp
            Search Binary Search Trees Linear
            Shortest Path A* Dijkstra
            Sorting Bubble Sort Insertion Sort Merge Sort Quick Sort (duh) Selection Sort
            Stack
            Trie

            Support

            Don't hesitate to create a pull request. Every contribution is appreciated. In development you can start the tests by calling npm test. Checkout our contribution README for more info.
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