tarjan | Graph loop detection in Go using Tarjan 's algorithm

 by   looplab Go Version: v0.1.0 License: Apache-2.0

kandi X-RAY | tarjan Summary

kandi X-RAY | tarjan Summary

tarjan is a Go library typically used in User Interface applications. tarjan has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Tarjan is a graph loop detection function using Tarjan's algorithm. The algorithm takes a input graph and produces a slice where each item is a slice of strongly connected vertices. The input graph is in form of a map where the key is a graph vertex and the value is the edges in for of a slice of vertices. Based on an implementation by Gustavo Niemeyer (in mgo/txn): For API docs and examples see
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            kandi-support Support

              tarjan has a low active ecosystem.
              It has 55 star(s) with 11 fork(s). There are 3 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 1 open issues and 1 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of tarjan is v0.1.0

            kandi-Quality Quality

              tarjan has no bugs reported.

            kandi-Security Security

              tarjan has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              tarjan 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

              tarjan releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed tarjan and discovered the below as its top functions. This is intended to give you an instant insight into tarjan implemented functionality, and help decide if they suit your requirements.
            • StrongConnect connects v to the data graph .
            • Connections returns a list of connected nodes .
            Get all kandi verified functions for this library.

            tarjan Key Features

            No Key Features are available at this moment for tarjan.

            tarjan Examples and Code Snippets

            Example
            Godot img1Lines of Code : 15dot img1License : Permissive (Apache-2.0)
            copy iconCopy
            graph := make(map[interface{}][]interface{})
            graph["1"] = []interface{}{"2"}
            graph["2"] = []interface{}{"3"}
            graph["3"] = []interface{}{"1"}
            graph["4"] = []interface{}{"2", "3", "5"}
            graph["5"] = []interface{}{"4", "6"}
            graph["6"] = []interface{}{"3"  

            Community Discussions

            QUESTION

            Xamarin animation causing my application to skip many frames
            Asked 2021-May-30 at 21:34

            I have a main View Page, with a frame & image (inside drawable folder). on Back-end i am doing simple animation for 3 seconds

            My Question:

            How am I doing too much work by simple animation and image is 500x500. How to fix this error?

            By the way, it works fine, if i remove animation code Task.WhenAll

            ...

            ANSWER

            Answered 2021-May-30 at 21:14

            OnAppearing happens just before the page is diplayed.

            To get smooth animation, you want the page to finish displaying before the animation starts. This requires the following two code changes:

            1. DO NOT WAIT for the animation to finish - let OnAppearing return.

            2. Delay the start of the animation.

            Code:

            Source https://stackoverflow.com/questions/67763091

            QUESTION

            Xamarin Custom Control Command doesn't work
            Asked 2021-Apr-09 at 10:33

            I want my custom Control to fire a Command when a button is clicked.

            ...

            ANSWER

            Answered 2021-Apr-09 at 06:04

            According to your description and code, you want to create Icommand in Custom control,

            I do one sample that you can take a look, creating Icommand BindableProperty firstly.

            TestControl:

            Source https://stackoverflow.com/questions/67005700

            QUESTION

            Strongly Connected Components
            Asked 2021-Mar-18 at 21:31

            I got a problem, my output is not correct

            ...

            ANSWER

            Answered 2021-Mar-18 at 21:31

            The problem is in the line where you initialize the Lists for your adj-Array:

            Source https://stackoverflow.com/questions/66698126

            QUESTION

            Xamarin.Forms : How to get and add swipe events on Android and ios?
            Asked 2021-Jan-22 at 02:01

            ・I use Xamarin.Forms

            ・on UWP, it worked

            ・But on Android and ios, I don't know how implement it.

            This is my code

            ...

            ANSWER

            Answered 2021-Jan-22 at 02:01

            Swipe Gesture Recognizer is cross platforms and you can read the document about how to Add a swipe gesture recognizer.

            Here is an example:

            In xaml:

            Source https://stackoverflow.com/questions/65830840

            QUESTION

            Xamarin: OpenGL Video Encoding Locks Up on 46000 Outstanding GREFs. Performing a full GC
            Asked 2020-Oct-10 at 21:12

            I have a long running video task in a Xamarin.Android app; it decodes a video file using a MediaPlayer into a custom OpenGL ES Surface then queues another Surface, encodes the data using a MediaCodec and drains into a ByteBuffer, which then is passed into a MediaMuxer based upon encoder output ByteBuffer availability. The operation works well and fast, until the video file written byte total is over ~1.3GB, at which point the video (but not audio) will lockup.

            The app seems to have too many GREFs, as I'm watching them go up and down in realtime, until they're finally well above 46000 GREFs. It seems like the operating system (or app?) is having trouble dumping all of the GREFs via GC, which causes the app to get stuck in the middle of video processing. I'm monitoring the android resources and the total available memory never changes very much at the OS level; the cpu also seems to always have plenty of idle headroom (~28%).

            I am outputting to the system console and watching the gref output logging using:

            adb shell setprop debug.mono.log gref

            The garbage collection seems to not be able to keep up after about 14 minutes. The GREF count goes up, then down, up, then down; eventually, it goes so high that the GREF count stays above 46k, with the following message looping:

            ...

            ANSWER

            Answered 2020-Oct-10 at 21:12

            It turns out that all I had to do was comment out the line I had mentioned as being suspect:

            var curDisplay = EGLContext.EGL.JavaCast().EglGetCurrentDisplay();

            It runs in a loop that gets called thousands of times for a complete video to finish.

            What must have been happening is that these EGLDisplay instances (var) were not being properly garbage collected. I would have thought they'd get automatically collected when the method is finished, but something was stopping that from happening. If you know more about this feel free to give a better answer; I'm not exactly sure what caused the finalizer to get hung up on those objects.

            That alone won't really do anyone very much in solving this type of problem, so here's how I figured it out:

            first I added this code to the MainActivity OnCreate .. this writes the GREF logs to a file in the /download folder at the root of the droid device then loops and updates every 120 seconds (or whatever interval you choose)

            Source https://stackoverflow.com/questions/64187403

            QUESTION

            Tarjan algorithm, recursion mistakes
            Asked 2020-Sep-07 at 23:59

            I'm trying to implement the Tarjan's algorithm (to find strongly connected components in a graph).

            I'm stuck in the dfs part of the algorithm where the components counter does not update itself properly. I think it's a problem with my recursion method but I'm not able able to fix it.

            Here is the code:

            ...

            ANSWER

            Answered 2020-May-31 at 20:30

            The issue is that the modification that a function execution brings to components_c, nodes_c, must carry back to the caller's variables with the same name, but that is not happening, because these variables are local to their own function execution context. The caller's variables with those names will not be modified by the recursive calls it makes, but they should.

            You can solve this in different ways. One way is to make dfs_scc a function that is defined within scc, and to only define the two variables mentioned above in the scope of scc. Then dfs_scc can reference those variables via the nonlocal keyword instead of getting them as arguments, and so modify them in a way that will be seen by all execution contexts in the recursion tree.

            Here is how that looks:

            Source https://stackoverflow.com/questions/62120042

            QUESTION

            Tarjan's Algorithm implementation, Low value node issue
            Asked 2020-Aug-16 at 04:01

            I am trying to execute tarjans algorithm on a set of nodes from a graph, I can succesfully find Strongly Connected Components, however the root or the low value node is always off, even for SCC's with only 1 element the root node does not match that element For Example:

            ...

            ANSWER

            Answered 2020-Aug-16 at 04:01

            I was indexing the root node wrong nodes[at] is the proper way to access the root node

            Source https://stackoverflow.com/questions/63404896

            QUESTION

            Non-recursive version of Tarjan's algorithm
            Asked 2020-May-27 at 09:37

            I have the following (recursive) implementation of Tarjan's algorithm to find strongly connected components in a graph and it works fine:

            ...

            ANSWER

            Answered 2017-Oct-01 at 13:02

            Here is a direct non recursive translation of the original recursive implementation (assuming it's correct):

            Source https://stackoverflow.com/questions/46511682

            QUESTION

            Occasional I/Choreographer(17165): Skipped ## frames black screen lock up, Android Xamarin c#
            Asked 2020-Jan-16 at 02:52

            Occasionally when importing photos or returning to the app from an activity such as watching videos our app locks up and gets a black screen, although some functions still continue underneath such as toasts. The end of the log consistently says:

            ...

            ANSWER

            Answered 2020-Jan-16 at 02:52

            In case anyone has problems with this in the future, the destroy recordable surface code in the previous format is running upon return and intermittently. I moved it down to the code that executes on pause when the app surface is destroyed and it works now.

            Source https://stackoverflow.com/questions/59722618

            QUESTION

            Crash on Android arising from mono for using ParallelTask and ConcurrentStack usage
            Asked 2019-Nov-21 at 16:12
            Description

            I am getting a crash from mono, from the logo I dont get anything specific which I can change in the code

            ...

            ANSWER

            Answered 2019-Nov-21 at 16:12

            If anyone is facing the same issue, the solution it to switch the type of debugger from Tarjan to New

            • Create a file Environment.txt and set the properties Build Action as AndroidEnvironment

            • Content will be

            Source https://stackoverflow.com/questions/58884759

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

            Vulnerabilities

            No vulnerabilities reported

            Install tarjan

            You can download it from GitHub.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            https://github.com/looplab/tarjan.git

          • CLI

            gh repo clone looplab/tarjan

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            git@github.com:looplab/tarjan.git

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