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forem | For empowering community | Collaboration library

 by   forem Ruby Version: Current License: AGPL-3.0

 by   forem Ruby Version: Current License: AGPL-3.0

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kandi X-RAY | forem Summary

forem is a Ruby library typically used in Web Site, Collaboration applications. forem has a Strong Copyleft License and it has medium support. However forem has 277 bugs and it has 66 vulnerabilities. You can download it from GitHub.
Forem is open source software for building communities. Communities for your peers, customers, fanbases, families, friends, and any other time and space where people need to come together to be part of a collective. See our announcement post for a high-level overview of what Forem is. dev.to (or just DEV) is hosted by Forem. It is a community of software developers who write articles, take part in discussions, and build their professional profiles. We value supportive and constructive dialogue in the pursuit of great code and career growth for all members. The ecosystem spans from beginner to advanced developers, and all are welcome to find their place within our community. ❤️.
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Quality
Quality
Security
Security
License
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kandi-support Support

  • forem has a medium active ecosystem.
  • It has 18980 star(s) with 3335 fork(s). There are 352 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 414 open issues and 4155 have been closed. On average issues are closed in 15 days. There are 21 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of forem is current.
forem Support
Best in #Collaboration
Average in #Collaboration
forem Support
Best in #Collaboration
Average in #Collaboration

quality kandi Quality

  • forem has 277 bugs (0 blocker, 0 critical, 98 major, 179 minor) and 669 code smells.
forem Quality
Best in #Collaboration
Average in #Collaboration
forem Quality
Best in #Collaboration
Average in #Collaboration

securitySecurity

  • forem has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • forem code analysis shows 66 unresolved vulnerabilities (66 blocker, 0 critical, 0 major, 0 minor).
  • There are 25 security hotspots that need review.
forem Security
Best in #Collaboration
Average in #Collaboration
forem Security
Best in #Collaboration
Average in #Collaboration

license License

  • forem is licensed under the AGPL-3.0 License. This license is Strong Copyleft.
  • Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.
forem License
Best in #Collaboration
Average in #Collaboration
forem License
Best in #Collaboration
Average in #Collaboration

buildReuse

  • forem 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.
forem Reuse
Best in #Collaboration
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forem Reuse
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Top functions reviewed by kandi - BETA

kandi has reviewed forem and discovered the below as its top functions. This is intended to give you an instant insight into forem implemented functionality, and help decide if they suit your requirements.

  • This method is called when the user is successful .
    • send email email
      • The articles of an article
        • Check user s status
          • Creates an article from the user .
            • Returns a full page .
              • Helper method for rendering image images .
                • Creates a credit hash
                  • Updates a plugin .
                    • Writes a new file .

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      forem Key Features

                      For empowering community 🌱

                      Community Discussions

                      Trending Discussions on forem
                      • Error after input introduction. No compilation errors
                      Trending Discussions on forem

                      QUESTION

                      Error after input introduction. No compilation errors

                      Asked 2021-Jan-25 at 19:02

                      I don't know why this is happening but I need help to understand why the program is crashing. My program intends to use the Kruskal algorithm to find the lightest paths between cities (airports and roads). For this, it creates an undirected graph that links the vertices with the assigned arcs. However, after I introduce the number of cities, airports and roads, the program crashes.

                      Full code:

                      #include <stdio.h>
                      #include <stdlib.h>
                      #include <string.h>
                      
                      // Uma estrutura para representar um arco pesado no grafo.
                      struct Edge {
                          int src, dest, weight;
                      };
                      
                      // Uma estrutura para representar um grafo ligado, não dirigido e pesado.
                      struct Graph {
                          // V -> Número de vértices (Número de cidades), E -> Número de arcos (Número de estradas + conecções por aeroportos).
                          int V;
                          int E;
                      
                          // O grafo é representado como um array de arcos.
                          // Visto o grafo ser não dirigido, o arco
                          // da origem (src) ao destino (dest) é igual
                          // ao arco de dest a src. Ambos são contados como 1 arco.
                          struct Edge* edge;
                      };
                      
                      // Cria um grafo com V vértices e E arcos.
                      struct Graph* createGraph(int V, int E)
                      {
                          struct Graph* graph;
                          graph->V = V;
                          graph->E = E;
                          graph->edge = (struct Edge*)malloc(E * sizeof(struct Edge));
                          return graph;
                      };
                      
                      // Uma estrutura para representar um subconjunto para as funções "find" e "Union".
                      struct subset {
                          int parent;
                          int rank;
                      };
                      
                      // Função que procura pelo nº de vezes que o elemento i aparece.
                      int find(struct subset subsets[], int i)
                      {
                          // Encontra a raíz e torna a raíz o predecessor de i.
                          if (subsets[i].parent != i)
                              subsets[i].parent
                                  = find(subsets, subsets[i].parent);
                      
                          return subsets[i].parent;
                      }
                      
                      // Função que une os conjuntos x e y.
                      void Union(struct subset subsets[], int x, int y)
                      {
                          int xroot = find(subsets, x);
                          int yroot = find(subsets, y);
                      
                          // Agrega a árvore com rank pequeno sob a raíz da árvore com rank maior (Union by Rank).
                          if (subsets[xroot].rank < subsets[yroot].rank)
                              subsets[xroot].parent = yroot;
                          else if (subsets[xroot].rank > subsets[yroot].rank)
                              subsets[yroot].parent = xroot;
                      
                          // Se os ranks forem os mesmos, tornar um deles na raíz e incrementar a sua rank por 1.
                          else
                          {
                              subsets[yroot].parent = xroot;
                              subsets[xroot].rank++;
                          }
                      }
                      
                      // Compara 2 arcos de acordo com os pesos.
                      // Usado na função "qsort" para ordenar o array de arcos.
                      int myComp(const void* a, const void* b)
                      {
                          struct Edge* a1 = (struct Edge*)a;
                          struct Edge* b1 = (struct Edge*)b;
                          return a1->weight > b1->weight;
                      }
                      
                      // Função principal para construir a MST usando o algoritmo de Kruskal.
                      void KruskalMST(struct Graph* graph)
                      {
                          int V = graph->V;
                          struct Edge
                              result[V]; // Guarda a MST resultante.
                          int e = 0; // Variável de índice, usada para o result[].
                          int i = 0; // Variável de índice, usada para arcos ordenados.
                      
                          // 1º pass: Ordenar todos os arcos por ordem crescente dos pesos.
                          // Se não podemos alterar o grafo dado, copiamos o array de arcos original.
                          qsort(graph->edge, graph->E, sizeof(graph->edge[0]),
                                myComp);
                      
                          // Alocar memória para criar V subconjuntos.
                          struct subset* subsets
                              = (struct subset*)malloc(V * sizeof(struct subset));
                      
                          // Criar V subconjuntos com 1 só elemento.
                          for (int v = 0; v < V; ++v) {
                              subsets[v].parent = v;
                              subsets[v].rank = 0;
                          }
                      
                          // Número total de arcos possível = V-1.
                          while (e < V - 1 && i < graph->E) {
                              // 2º passo: Escolher o arco mais leve.Pick the smallest edge.
                              // Incrementar o índice para a próxima iteração.
                              struct Edge next_edge = graph->edge[i++];
                      
                              int x = find(subsets, next_edge.src);
                              int y = find(subsets, next_edge.dest);
                      
                              // Se a inclusão do arco não causa um ciclo, incluí-lo no result [] e,
                              // incrementar o índice do result[] para o arco seguinte.
                              if (x != y) {
                                  result[e++] = next_edge;
                                  Union(subsets, x, y);
                              }
                              // Senão, descartar o arco.
                          }
                      
                          printf("Arcos da MST:\n");
                          printf("V1   V2  Custo\n");
                          int minimumCost = 0;
                          int nRoads = 0;
                          int nAirports = 0;
                          for (i = 0; i < e; ++i)
                          {
                              printf("%d -- %d == %d\n", result[i].src,
                                     result[i].dest, result[i].weight);
                              if (result[i].src == 0 || result[i].dest == 0) {
                                  nAirports++;
                              }
                              else {
                                  nRoads++;
                              }
                              minimumCost += result[i].weight;
                          }
                          printf("Minimum Spanning Tree com custo minimo: %d\n",minimumCost);
                          printf("Numero de aeroportos: %d\n",nAirports);
                          printf("Numero de estradas: %d",nRoads);
                          return;
                      }
                      
                      int main()
                      {
                          int V = 0; // Number of cities(vertices) in the graph.
                          int A = 0; // Number of airports.
                          int e = 0; // Number of roads.
                          int E = 0; // Total number of edges in the graph.
                          int city, airport, city1, city2, cost = 0;
                      
                          printf("Choose the number of cities: \n");
                          scanf("%d", &V);
                          printf("Choose the number of airports: \n");
                          scanf("%d", &A);
                          printf("Choose the number of roads: \n");
                          scanf("%d", &e);
                      
                          E = A + e;
                      
                          struct Graph* graph = createGraph(V, E);
                      
                          for (int i = 0; i < A; i++) {
                              printf("Input the cost of the airport: \n");
                              scanf("%d %d", &city, &airport);
                      
                              graph->edge[i].src = city;
                              graph->edge[i].dest = 0; // "sky" vertex
                              graph->edge[i].weight = airport;
                          }
                      
                          for (int j = A; j < A + E; j++) {
                              printf("Pick the path and building cost of the road: \n");
                              scanf("%d %d %d", &city1, &city2, &cost);
                      
                              graph->edge[j].src = city1;
                              graph->edge[j].dest = city2;
                              graph->edge[j].weight = cost;
                          }
                      
                          KruskalMST(graph);
                      
                          return 0;
                      }
                      

                      ANSWER

                      Answered 2021-Jan-25 at 19:02
                      struct Graph* graph;
                      graph->V = V;
                      

                      This declares an uninitialized pointer that points to nowhere, and graph->V on the next line dereferences it. You need to malloc the graph first.

                      struct Graph* graph = malloc(sizeof *graph);
                      graph->V = V;
                      

                      I recommend writing malloc this way rather than as (struct Graph*)malloc(sizeof(struct Graph)). Two good habits to get into:

                      1. Don't cast the result of malloc. In C++ you have to but in C you should not. It's unnecessary and it will suppress a warning if you forget to #include <stdlib.h>.
                      2. sizeof *variable is better than sizeof(Type) because it doesn't repeat the variable's type. If you write sizeof *variable and later change the variable name you'll get a compile-time error. If you write sizeof(Type) and later change the variable's type you won't get an error and it'll just allocate the wrong amount of memory.

                      Source https://stackoverflow.com/questions/65890314

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

                      Vulnerabilities

                      No vulnerabilities reported

                      Install forem

                      This section provides a high-level quick start guide. If you're looking for a more thorough installation guide (for example with macOS, you'll want to refer to our complete Developer Documentation. We run on a Rails backend, and we are currently transitioning to a Preact-first frontend. A more complete overview of our stack is available in our docs.
                      Please see our installation guides, such as the one for macOS.

                      Support

                      For a place to have open discussions on features, voice your ideas, or get help with general questions please visit our community at forem.dev.

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