[ { "idx": 1, "url": "https://launchdarkly.com/blog/launchdarklys-evolution-from-polling-to-streaming/", "ok": true, "error": null }, { "idx": 2, "url": "https://www.zebrium.com/blog/virtual-tracing-a-simpler-alternative-to-distributed-tracing-for-troubleshooting", "ok": true, "error": null }, { "idx": 3, "url": "https://static.googleusercontent.com/media/www.google.com/en//appsstatus/ir/u5sinmib27yly4i.pdf", "ok": false, "error": "non-html resource" }, { "idx": 4, "url": "https://eng.uber.com/microservice-architecture/", "ok": false, "error": "HTTP 404" }, { "idx": 5, "url": "https://www.pagerduty.com/blog/remote-incident-response/", "ok": false, "error": "HTTP 404" }, { "idx": 6, "url": "https://surfingcomplexity.blog/2020/07/28/safe-by-design/", "ok": true, "error": null }, { "idx": 7, "url": "https://surfingcomplexity.blog/2020/07/28/all-we-can-do-is-find-problems/", "ok": true, "error": null } ]