Go raises the “cannot type switch on non-interface value” error when you try to use a type switch on a value that is not an interface. To fix the “cannot type switch on non-interface value” error, you must ensure that the value you use in the type switch is an interface. In Go, you can … Read more
Go raises the “Error 1040: Too many connections” in MySQL occurs when the maximum number of concurrent connections to the MySQL server has been reached. By default, MySQL allows up to 151 concurrent connections. In a Go application, this error might occur if your application creates many connections without closing them or uses a connection … Read more
To fix the Error: unexpected end of json input in Go, ensure the JSON input is complete and well-formed. Golang raises the Error: unexpected end of json input when you try to unmarshal a JSON string using the json.Unmarshal() function, but the input JSON is incomplete, malformed, or empty. package main import ( “encoding/json” “fmt” ) … Read more
To read an entire file in Golang, you can use the “ReadFile()” function from the “ioutil/os” package. This function reads the entire file content into a byte slice, and then you can use the “string()” function to read the file content as a string. Example package main import ( “fmt” “io/ioutil” “log” ) func main() … Read more
There are the following ways to convert time.Time to String in Golang. Method 1: Using the time.Now().Format() function Method 2: Using the time.String() function Method 1: Using the time.Format() function In Golang, you can convert a time.Time value to a string using the time.Now().Format() method. The Format() method allows you to specify a layout string … Read more
To subtract time.Duration from time.Time value in Golang, you can use the Add() method with a negative duration. The AddDate() function is not suitable for subtracting a time.Duration from a time.Time value because it works with years, months, and days, not durations like hours, minutes, or seconds. package main import ( “fmt” “time” ) func … Read more
To split a string on whitespace characters (spaces, tabs, and newlines) in Go, you can use the strings.Fields() function from the strings package. package main import ( “fmt” “strings” ) func main() { input := “This is John Wick” words := strings.Fields(input) fmt.Println(“Words in the input string:”) for i, word := range words { fmt.Printf(“Word … Read more
The “Cannot find package” error occurs in Go when you run the go build command even though your GOPATH is set, it’s possible that you’re not using Go modules, and your package import paths or directory structure may be incorrect. Here are some steps to help you troubleshoot and fix the issue. Step 1: Make sure … Read more
To fix the go: go.mod file not found in current directory or any parent directory error in Golang, you can create a go.mod file using the go mod init <module_name> command or use this command: go env -w GO111MODULE=off. The “go: go.mod file not found in current directory or any parent directory” error occurs when you try … Read more
In Go, you can use interfaces and dependency injection to mock functions for testing purposes. By creating an interface that defines the functions you want to mock and injecting it as a dependency into the component you’re testing, you can easily swap out the real implementation with a mock implementation during testing. Let’s go through … Read more