{"record":{"id":"944fdb682dc996c4","repo":"inancgumus/learngo","slug":"wrong-number-of-fields-q","errorCode":null,"errorMessage":"wrong number of fields %q","messagePattern":"wrong number of fields %q","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"logparser/functional/result.go","lineNumber":38,"sourceCode":"// parseFields parses and returns the parsing result\nfunc parseFields(line string) (r result, err error) {\n\tfields := strings.Fields(line)\n\n\tif len(fields) != fieldsLength {\n\t\treturn r, fmt.Errorf(\"wrong number of fields %q\", fields)\n\t}\n\n\tr.domain = fields[0]\n\tr.page = fields[1]\n\n\tf := new(field)\n\tr.visits = f.uatoi(\"visits\", fields[2])\n\tr.uniques = f.uatoi(\"uniques\", fields[3])\n\n\treturn r, f.err\n}","sourceCodeStart":20,"sourceCodeEnd":56,"githubUrl":"https://github.com/inancgumus/learngo/blob/3c475a78e54336c6255e925ff66b8ef4da6a2ae7/logparser/functional/result.go#L20-L56","documentation":"parseFields enforces the fixed log schema of fieldsLength (4) columns: domain, page, visits, uniques. When strings.Fields yields a different count — extra whitespace-separated tokens or missing columns — it returns this error with the offending fields slice quoted instead of a record. The %q on a []string prints like [\"domain\" \"page\" ...].","triggerScenarios":"Thrown at logparser/functional/result.go:38 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Skip the malformed line and continue parsing the remaining log.","Fix the log line so it has exactly four columns: domain page visits uniques.","Log the offending line with its number for later correction of the input data."],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"3c475a78e54336c6255e925ff66b8ef4da6a2ae7","analyzedAt":"2026-09-02T10:14:38.492Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T16:17:10.729Z"}