In Golang, using the a case-insensitive flag is the easiest way to do a case insensitive regular expression. Using a case-insensitive flag You can set a case-insensitive flag as the first item in the regex. You can add a (?i) at the beginning of th...

In Golang, there are 2 ways to access command-line arguments passed to a program. Using os.Args Variable You can access the command-line arguments using the os.Args variable. Note that the first value in this slice is the path to the program, and o...

In Golang, using the len function is the easiest way to count the items in the map structure. Using len Function The built-in function len take arguments of various types and return a result of type int. The implementation guarantees that the result...

In Golang, using the os.O_APPEND flag is the easiest way to append text to a file Using os.OpenFile Function OpenFile is the generalized open call; most users will use Open or Create instead. It opens the named file with specified flag (O_RDONLY etc...

In Golang, using the runtime.FuncForPC function is the easiest way to get the name of a function Using runtime.FuncForPC Function The runtime.FuncForPC() function returns a *Func describing the function that contains the given program counter addres...

In Golang, there are 2 ways to iterate over a slice in reverse. Using For Loop There is no convenient operator for this to add to the range one in place. You'll have to do a normal for loop counting down. See the following example: package main...

In Golang, using the os.MkdirAll function is the easiest way to create nested directories Using os.MkdirAll Function The os.MkdirAll() function creates a directory named path, along with any necessary parents, and returns nil, or else returns an er...

In Golang, using the io.copy function is the easiest way to download a large file Using io.Copy Function The io.Copy() function copies from src to dst until either EOF is reached on src or an error occurs. It returns the number of bytes copied and ...

In Golang, there are 2 ways to convert a bool to a string. Using strconv.FormatBool Function The strconv.FormatBool() function returns "true" or "false" according to the value of b. For example, package main import ( "fmt" "strconv" ) fun...

In Golang, there are 2 ways to index characters in a string. Using individual characters In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. Strings behave like slices of bytes. A rune is an integer value i...

In Golang, there are 2 ways to unpack array as arguments. Using Variadic Functions Variadic functions can be called with any number of trailing arguments. Here’s a function that will take an arbitrary number of ints as arguments. For example, p...

In Golang, there are 2 ways to set timeout for http.Get requests Using http.Client.Timeout Field Timeout specifies a time limit for requests made by this Client. The timeout includes connection time, any redirects, and reading the response body. S...

In Golang, using the time.Duration function is the easiest way to subtract time from a time.Time Using time.Duration Function A Duration represents the elapsed time between two instants as an int64 nanosecond count. The representation limits the la...

In Golang, using the float64 function is the easiest way to convert an integer to a float number. Using float64 Function The easiest way to convert an integer to a float number in Golang: package main import "fmt" func main() { i := 6 f ...

In Golang, there are 4 ways to generate a uuid. Using uuid Package install Use the following command to download the repository to the local file system. install go mod tidy go get github.com/google/uuid go install github.com...