v1 List topics in project (DEPRECATED)
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(DEPRECATED) List topics in project
Code sample
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[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],[],[],[],null,["# v1 List topics in project (DEPRECATED)\n\n(DEPRECATED) List topics in project\n\nCode sample\n-----------\n\n### Go\n\n\nBefore trying this sample, follow the Go setup instructions in the\n[Pub/Sub quickstart using\nclient libraries](/pubsub/docs/quickstart-client-libraries).\n\n\nFor more information, see the\n[Pub/Sub Go API\nreference documentation](https://godoc.org/cloud.google.com/go/pubsub).\n\n\nTo authenticate to Pub/Sub, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n import (\n \t\"context\"\n \t\"fmt\"\n\n \t\"cloud.google.com/go/pubsub\"\n \t\"google.golang.org/api/iterator\"\n )\n\n func list(projectID string) ([]*pubsub.Topic, error) {\n \t// projectID := \"my-project-id\"\n \tctx := context.Background()\n \tclient, err := pubsub.https://cloud.google.com/go/docs/reference/cloud.google.com/go/pubsub/latest/index.html#cloud_google_com_go_pubsub_Client_NewClient(ctx, projectID)\n \tif err != nil {\n \t\treturn nil, fmt.Errorf(\"pubsub.NewClient: %w\", err)\n \t}\n \tdefer client.Close()\n\n \tvar topics []*pubsub.Topic\n\n \tit := client.Topics(ctx)\n \tfor {\n \t\ttopic, err := it.Next()\n \t\tif err == iterator.Done {\n \t\t\tbreak\n \t\t}\n \t\tif err != nil {\n \t\t\treturn nil, fmt.Errorf(\"Next: %w\", err)\n \t\t}\n \t\ttopics = append(topics, topic)\n \t}\n\n \treturn topics, nil\n }\n\n### Ruby\n\n\nBefore trying this sample, follow the Ruby setup instructions in the\n[Pub/Sub quickstart using\nclient libraries](/pubsub/docs/quickstart-client-libraries).\n\n\nFor more information, see the\n[Pub/Sub Ruby API\nreference documentation](https://googleapis.dev/ruby/google-cloud-pubsub/latest/Google/Cloud/PubSub.html).\n\n\nTo authenticate to Pub/Sub, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n\n pubsub = Google::Cloud::https://cloud.google.com/ruby/docs/reference/google-cloud-pubsub/latest/Google-Cloud.html.new\n\n topics = pubsub.topics\n\n puts \"Topics in project:\"\n topics.each do |topic|\n puts topic.name\n end\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=pubsub)."]]