go

问题 I'm currently having trouble trying to run this code which is supposed to call the unix command sed to find and replace the string hello with goodbye in the file ./myfile.txt This works fine if you run it from the command line, but if I try the same thing from my Go code.... command := exec.Command("sed", "-e \"s/hello/goodbye/g\" ./myfile.txt") result,err := command.CombinedOutput() fmt.Println(string(result)) Bit I just keep on getting this output sed: -e expression #1, char 2: unknown

问题 I am learning ML in Go. I was exploring Golearn Package in Go, for ML support. I am very confused with the way the model.fit and model.predict functions are implemented. For example in this example implementation of Knn Classifier from Golearn repo: rawData, err := base.ParseCSVToInstances("../datasets/iris_headers.csv", true) cls := knn.NewKnnClassifier("euclidean", "linear", 2) trainData, testData := base.InstancesTrainTestSplit(rawData, 0.50) cls.Fit(trainData) predictions, err := cls

问题 I am learning ML in Go. I was exploring Golearn Package in Go, for ML support. I am very confused with the way the model.fit and model.predict functions are implemented. For example in this example implementation of Knn Classifier from Golearn repo: rawData, err := base.ParseCSVToInstances("../datasets/iris_headers.csv", true) cls := knn.NewKnnClassifier("euclidean", "linear", 2) trainData, testData := base.InstancesTrainTestSplit(rawData, 0.50) cls.Fit(trainData) predictions, err := cls

问题 I am learning ML in Go. I was exploring Golearn Package in Go, for ML support. I am very confused with the way the model.fit and model.predict functions are implemented. For example in this example implementation of Knn Classifier from Golearn repo: rawData, err := base.ParseCSVToInstances("../datasets/iris_headers.csv", true) cls := knn.NewKnnClassifier("euclidean", "linear", 2) trainData, testData := base.InstancesTrainTestSplit(rawData, 0.50) cls.Fit(trainData) predictions, err := cls

问题 I am learning ML in Go. I was exploring Golearn Package in Go, for ML support. I am very confused with the way the model.fit and model.predict functions are implemented. For example in this example implementation of Knn Classifier from Golearn repo: rawData, err := base.ParseCSVToInstances("../datasets/iris_headers.csv", true) cls := knn.NewKnnClassifier("euclidean", "linear", 2) trainData, testData := base.InstancesTrainTestSplit(rawData, 0.50) cls.Fit(trainData) predictions, err := cls

问题 I'm am using a struct Contact that has a Load() method. The idea is that Load() populates Contact 's fields with data. The data is unmarshalled from json returned by a server. Once loaded, I want to be able to access the data on Contact . I know that the json is unmarshalling correctly because I can print the data to the console within Load() , immediately after it has been unmarshalled. However, this data is not present on Contact once it has been loaded. So when I create a new Contact and

问题 This question already has answers here : go build works fine but go run fails (2 answers) Closed 3 years ago . I've started Go and am trying to follow this tutorial. Everything builds correct but as I try to run it, I get the error that makeRouter() could not be found. I had a look at some other questions, like this one, and checked the docs, but I couldn't find out whats wrong with my setup. My folder structure: .../wattagebazooka/ |- wattagebazooka.go |- router.go |- handler.go Code

问题 This question already has answers here : go build works fine but go run fails (2 answers) Closed 3 years ago . I've started Go and am trying to follow this tutorial. Everything builds correct but as I try to run it, I get the error that makeRouter() could not be found. I had a look at some other questions, like this one, and checked the docs, but I couldn't find out whats wrong with my setup. My folder structure: .../wattagebazooka/ |- wattagebazooka.go |- router.go |- handler.go Code

问题 When executing the following code I get what I expect when the first loop is done (sequence from 0 to 9). But when the second loop finishes, the result is not what I expected (I expected the same result as in the first loop, but it prints only '10's): package main import ( "fmt" "sync" ) func main() { var wg sync.WaitGroup for i := 0; i < 10; i++ { wg.Add(1) go func(j int) { defer wg.Done() fmt.Println(j) }(i) } wg.Wait() fmt.Println("done first") for i := 0; i < 10; i++ { wg.Add(1) go func()

问题 I have to parse some nested JSON, which translates into a Go type, like this: type Config struct { Mail struct { From string To string Password string } Summary struct { Send bool Interval int } } Now I want to call a function for each key (Mail, Summary), I tried it like this: utils.StartNewMailer(config.Mail) The problem is, how do I construct the called function, I tried to mirror the Mail struct (and called it mailConfig ), since I can't pass an arbitrary struct as an argument. func