go

Why is atomic.StoreUint32 preferred over a normal assignment in sync.Once?

由 不羁的心 提交于 2021-02-05 04:58:30
问题 While reading the source codes of Go, I have a question about the code in src/sync/once.go: func (o *Once) Do(f func()) { // Note: Here is an incorrect implementation of Do: // // if atomic.CompareAndSwapUint32(&o.done, 0, 1) { // f() // } // // Do guarantees that when it returns, f has finished. // This implementation would not implement that guarantee: // given two simultaneous calls, the winner of the cas would // call f, and the second would return immediately, without // waiting for the

译——人工智能是否是测试的未来？

由 爷，独闯天下 提交于 2021-02-04 22:59:41
Software development has already undergone an important journey from its beginnings to test automation and continuous testing. As time progresses, however, it is certain that testing will have to evolve as well. With digital transformations and the drive towards DevOps, automated testing is now at the heart of software testing and has taken the lead in the development process. 软件的发展从开始到自动化测试和持续测试已经走过了一个重要的旅程。时间的流逝，测试也会同样的演变是毋庸置疑的。随着数据的变革和开发运维驱动，自动化测试现在已经是软件测试的核心，并且在发展的进程中处于领先地位。 Artificial Intelligence (AI) seems to be the future of testing. AI has created high hopes in software testing and

Go all goroutines are asleep deadlock

由 半腔热情 提交于 2021-02-04 22:00:42
问题 Can't seem to figure out why I'm getting the error message: fatal error: all goroutines are asleep - deadlock!. I suspected a race condition was occurring in my block below which should only execute after the channel is closed. I thought adding a sync WaitGroup would help, but it's only given me this deadlock. What I have looks close to the samples I've seen online, so I'm just not sure what's wrong here. func S3UploadFolder(instance *confighelper.Instance, sess *session.Session, srcFolder

Go all goroutines are asleep deadlock

由 六月ゝ 毕业季﹏ 提交于 2021-02-04 21:59:32
问题 Can't seem to figure out why I'm getting the error message: fatal error: all goroutines are asleep - deadlock!. I suspected a race condition was occurring in my block below which should only execute after the channel is closed. I thought adding a sync WaitGroup would help, but it's only given me this deadlock. What I have looks close to the samples I've seen online, so I'm just not sure what's wrong here. func S3UploadFolder(instance *confighelper.Instance, sess *session.Session, srcFolder

Go all goroutines are asleep deadlock

由 ▼魔方 西西 提交于 2021-02-04 21:58:24
问题 Can't seem to figure out why I'm getting the error message: fatal error: all goroutines are asleep - deadlock!. I suspected a race condition was occurring in my block below which should only execute after the channel is closed. I thought adding a sync WaitGroup would help, but it's only given me this deadlock. What I have looks close to the samples I've seen online, so I'm just not sure what's wrong here. func S3UploadFolder(instance *confighelper.Instance, sess *session.Session, srcFolder

Whats the best way to get content from a generic and somehow dynamic go map?

由 你。 提交于 2021-02-04 21:57:49
问题 I have this json that I convert to: var leerCHAT []interface{} but I am going through crazy hoops to get to any point on that map inside map and inside map crazyness, specially because some results are different content. this is the Json [ null, null, "hub:zWXroom", "presence_diff", { "joins":{ "f718a187-6e96-4d62-9c2d-67aedea00000":{ "metas":[ { "context":{}, "permissions":{}, "phx_ref":"zNDwmfsome=", "phx_ref_prev":"zDMbRTmsome=", "presence":"lobby", "profile":{}, "roles":{} } ] } },

Whats the best way to get content from a generic and somehow dynamic go map?

由 本小妞迷上赌 提交于 2021-02-04 21:56:46
问题 I have this json that I convert to: var leerCHAT []interface{} but I am going through crazy hoops to get to any point on that map inside map and inside map crazyness, specially because some results are different content. this is the Json [ null, null, "hub:zWXroom", "presence_diff", { "joins":{ "f718a187-6e96-4d62-9c2d-67aedea00000":{ "metas":[ { "context":{}, "permissions":{}, "phx_ref":"zNDwmfsome=", "phx_ref_prev":"zDMbRTmsome=", "presence":"lobby", "profile":{}, "roles":{} } ] } },

Unmarshal() is returning empty structs

由 那年仲夏 提交于 2021-02-04 21:56:29
问题 I'm trying to read from a file and load it into a struct slice. The lines that I read in are loaded correct as shown in the block comment. The issue I'm having is that the class variable keeps coming back with empty values. What am I doing wrong? func loadClasses(path string) []Class { var a []Class inFile, _ := os.Open(path) defer inFile.Close() scanner := bufio.NewScanner(inFile) scanner.Split(bufio.ScanLines) var class Class for scanner.Scan() { var err = json.Unmarshal(scanner.Bytes(),

Unmarshal() is returning empty structs

由 泪湿孤枕 提交于 2021-02-04 21:55:48
问题 I'm trying to read from a file and load it into a struct slice. The lines that I read in are loaded correct as shown in the block comment. The issue I'm having is that the class variable keeps coming back with empty values. What am I doing wrong? func loadClasses(path string) []Class { var a []Class inFile, _ := os.Open(path) defer inFile.Close() scanner := bufio.NewScanner(inFile) scanner.Split(bufio.ScanLines) var class Class for scanner.Scan() { var err = json.Unmarshal(scanner.Bytes(),

How to parse Prometheus data

由 爱⌒轻易说出口 提交于 2021-02-04 21:43:08
问题 I have been able to obtain the metrices by sending an HTTP GET as follows: # TYPE net_conntrack_dialer_conn_attempted_total untyped net_conntrack_dialer_conn_attempted_total{dialer_name="federate",instance="localhost:9090",job="prometheus"} 1 1608520832877 Now I need to parse this data and obtain control over every piece of data so that I can convert tand format like json. I have been looking into the ebnf package in Go: ebnf package Can somebody point me the right direction to parse the
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