 What is the equivalent code in golang for the following shell command ? date -u +%Y-%m-%dT%T%z 

How to convert ISO 8601 time in golang?

What is the difference between backticks (``) & double quotes ("") in golang? 

There are multiple answers/techniques to the below question:

How to set default values to golang structs?

I have a couple of answers but further discussion is require

How to set default values in Go structs

 Is there no XOR operator for booleans in golang?

I was trying to do something like b1^b2 but it said it wasn't defined for booleans.

Is there no XOR operator for booleans in golang?

I need to convert an int32 to string in Golang. Is it possible to convert int32 to string in Golang without converting to int or int64 first?

Itoa needs an int. FormatInt needs an int64.

Convert int32 to string in Golang

I want to create a package in Go with tests and examples for the package as subdirectories to keep the workspace cleaner. Is this possible and if so how?

All the documentation always puts the testing code in the same place as the other code, is this better in some way or just convention?

Golang tests in sub-directory

In Golang, we can create fake kubernetes clientsets using the package https://pkg.go.dev/k8s.io/client-go/kubernetes/fake but is there a way to get a fake kubeconfig from the Clientset? 

In Golang, when using the k8s.io/client-go/kubernetes package, the fake package provides a fake clientset for unit testing purposes. However, the fake clientset does not generate or use a real kubeconfig since it is intended for in-memory testing and doesn't interact with an actual Kubernetes cluster.

If you need to create a fake kubeconfig for unit testing purposes, you can achieve this by creating a custom kubeconfig struct and passing it to your clientset configuration. Here's an example of how you can create a fake kubeconfig:

// FakeKubeConfig is a custom fake kubeconfig struct

	// Add the fields you need for testing here

// ClientConfig returns the rest.Config from the fake kubeconfig

func (c *FakeKubeConfig) ClientConfig() (*rest.Config, error) {

	// Create and return a rest.Config with your desired configuration for testing

	// For example, you can set the Host, APIPath, and Insecure parameters for the fake kubeconfig.

		Host:        "https://fake-api-server",

// NewFakeClientset returns a new fake Kubernetes.Clientset using the provided fake kubeconfig

func NewFakeClientset(kubeConfig *FakeKubeConfig) (*kubernetes.Clientset, error) {

	config, err := kubeConfig.ClientConfig()

	clientset, err := kubernetes.NewForConfig(config)

	clientset, err := NewFakeClientset(fakeKubeConfig)

	// Now you can use the fake clientset for your unit tests

	pods, err := clientset.CoreV1().Pods("default").List(context.TODO(), metav1.ListOptions{})

	fmt.Printf("Number of pods in the default namespace: %d\n", len(pods.Items))

Please note that the example above is a simple illustration of creating a fake kubeconfig for testing purposes. Depending on your test requirements, you may need to add more fields and logic to the FakeKubeConfig struct and the ClientConfig() method.

Remember that the primary purpose of the fake clientset is to provide a controlled and predictable environment for unit testing, without the need to interact with a real Kubernetes cluster or create a real kubeconfig file.

Is there a way to get REST config from Clientset in Golang?

I'm trying to handle Postgres error. If user sends invalid uuid - Postgres returns an error with message: pq: invalid input syntax for type uuid:...

So, i want to check that error and if the error equals to the invalid input syntax error - i would like to show to the client 404 error, rather than returning server error.

But i can't find the defined error type for the returned error in Postgres library...

Can someone suggest me, where is the error returned?

golang pq sql driver: pq: invalid input syntax for type uuid error type

In nodejs I use __dirname . What is the equivalent of this in Golang?

I have googled and found out this article http://andrewbrookins.com/tech/golang-get-directory-of-the-current-file/ . Where he uses below code

_, filename, _, _ := runtime.Caller(1)
f, err := os.Open(path.Join(path.Dir(filename), "data.csv"))


But is it the right way or idiomatic way to do in Golang?

How to get the directory of the currently running file?

Is it possible to define an immutable struct in Golang? Once initialized then only read operation on struct's field, no modification of field values. If so, how to do that. 

Immutable Struct in Golang

Is it possible to convert a string to an io.Writer type in Golang?

I will be using this string in fmt.Fprintf() but I am unable to convert the type.

Golang Convert String to io.Writer?

Is it possible to build (install, go get, etc) an executable with the name foobar if my Golang package name is one of the following:

How to build executable with name other than Golang package

I am new with Galang and I need to concat string with nested map. Under is the dummy code is given, factor out my mistake

    str := "Hello @John martin #sosos &Hi @William "

    var retMap = make(map[string]map[string]string)

    retMap[key] = make(map[string]string)    

      //fmt.Println(string(str[i]), " >> ", str[i])

      if str[i] == 64 || str[i] == 35 || str[i] == 38 {

      retMap[key] = make(map[string]string) // If not assign here then it gives runtime error "panic: assignment to entry in nil map"

      for j := i + 1; j < len(str); j++ {

          retMap[key][id] = retMap[key][id] + col

go

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