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Page 1643 of 2109
Golang program to implement returning pointer from a function
In this article, we will write Golang programs to implement returning pointer from a function. A pointer stores the address of another variable and the address is depicted using & operator. Algorithm Step 1 − Create a package main and declare fmt(format package) package in the program where main produces executable codes and fmt helps in formatting input and Output. Step 2 − Create a function create_pointer that returns a pointer to the int Step 3 − Set the value of x in the function and return the variable back to the function Step 4 − Create a main ...
Read MoreGolang program to parse time
In golang we can use various internal time function to parse time. Time is parsed using parse and ParseInLocation method. Syntax time.Parse() This function belongs to time package. It is used to parse the string into time.Time value and it takes two inputs: the layout and the time string which is to be parsed. time.ParselnLocation() This function is a part of the time package. It is used to parse the string into time.Time value along with a specified location. It takes 3 arguments: the location, layout string and the time string. time.Format() This function is present in ...
Read MoreGolang program to implement select statement
The Golang Select statement is similar to the switch statement, the switch statement selects the Output based on the cases but here the Output is selected based on which communication occurs fast in the channels. Syntax func make ([] type, size, capacity) The make function in go language is used to create an array/map it accepts the type of variable to be created, its size and capacity as arguments. time.Sleep() This function belongs to the time package. Here, the word sleep depicts the meaning of the function which says that it will block the execution of goroutine for ...
Read MoreGolang program to show promoted methods
In golang, Promoted methods are the methods created under those structs which are embedded inside another struct, now the struct in which it is embedded can access its methods and fields. In this article we are going to explain how to show promoted methods using various structs like Rectangle and Square, Vehicle and car. Algorithm Step 1 − Create a package main and declare fmt(format package) package in the program where main produces executable codes and fmt helps in formatting input and Output. Step 2 − Create a Rectangle struct with two fields width and height of type float ...
Read MoreGolang program to depict use of promoted fields
In golang, promoted fields are the structs that are embedded inside another structs and their fields can also be accessed the structs in which they are embedded. In this article we are going to understand three different approaches to depict use of promoted filed with and without the help of pointers. Using Pointers In this illustration, we will make use of pointers to show the promoted fields. The field names will be set with the help of pointers and information will be printed using dot notation. Algorithm Step 1 − Create a package main and declare fmt(format package) package ...
Read MoreGolang program to show use of rand package
In golang, a rand package is used to generate random numbers/characters. Firstly, it seeds with the current time to get the different random Output each time then perform any operation. Syntax rand.Seed(value) Rand.Seed() function is used to generate random numbers. It takes a user input as argument which is the upper limit for generating random numbers. func Now() Time The Now() function is defined in time package. This function generates the current local time. To use this function, we have to first impot the time package in our program. func (t Time) UnixNano() int64 The UnixNano() function ...
Read MoreGolang program to print struct variables
In this Golang article, we will write programs to print struct variables. Here, there is no concept of classes, instead of that structs are used to represent a collection of related fields or properties. Using Name of the Field and Shorthand Declaration in the Main Function In this method, we will create a child struct and further create two fields name and age in it. The field values are set by creating the instance of the struct. In the second example, the field values of the Child struct are set in the instance using shorthand declaration and the field ...
Read MoreHow can I encode a string to Base64 in Swift?
In Swift, you can use the built-in Data type and its method base64EncodedString() to encode a string to Base64. In the iOS applications, you might need to encode a string to base64 mostly in networking requests and responses. Mostly, you will need to encode a string to base64 and vice versa. Let's learn how to encode a string to Base64 using Swift. Example In this example, we will use the following steps to encode a string to base64 − Step 1 − In this step, we will convert the string to a Data object using the data(using: .utf8) method. ...
Read MoreHow do I make an enum decodable in Swift?
In Swift, you can use the Codable protocol to make an enum decodable as well. In Swift, the Codable protocol is a very powerful concept to provide flexibility to decode and encode any type of value. Also, you can make an enum decodable as well. You have to just define an enum in your custom type. In order to make an enum decodable, the enum must conform to the Codable protocol. In this article, we will learn how to use the Codable protocol to make an enum decodable in Swift What is the JSONDecoder Class? The JSONDecoder class is then ...
Read MoreHow to convert a JSON string to a dictionary in Swift?
Swift provides a class called JSONSerialization to convert a JSON string to dictionary format. For example, you are receiving a JSON string from the database, in order to use it in the application, you might need to convert it into a real object type. In this article, you will see some examples of how to convert a JSON string into a dictionary. What is JSON String? A JSON string is a string that is converted to a different format such as base64 or URL encoding. This converted string can be used for networking requests or to store in the database. ...
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