What is enumeration in IOS?
An enumeration is a data type consisting of a set of named values, called members. Apple doc says: An enumeration defines a common type for a group of related values and enables you to work with those values in a type-safe way within your code.
What is enumeration explain with example?
An enumeration is used in any programming language to define a constant set of values. For example, the days of the week can be defined as an enumeration and used anywhere in the program. In C#, the enumeration is defined with the help of the keyword ‘enum’.
What is enumerated () in Swift?
In Swift, an enum (short for enumeration) is a user-defined data type that has a fixed set of related values. Here, Season – name of the enum.
What enumeration constants give an example?
Enumerated constants enable you to create new types and then to define variables of those types whose values are restricted to a set of possible values. For example, you can declare COLOR to be an enumeration, and you can define five values for COLOR: RED, BLUE, GREEN, WHITE, and BLACK.
What is rawValue in Swift?
A Swift enum can either have raw values or associated values. Why is that? It’s because of the definition of a raw value: A raw value is something that uniquely identifies a value of a particular type. “Uniquely” means that you don’t lose any information by using the raw value instead of the original value.
What is enum and enumerations?
An enumeration is a data type that consists of a set of named values that represent integral constants, known as enumeration constants. An enumeration is also referred to as an enumerated type because you must list (enumerate) each of the values in creating a name for each of them.
What is enumeration in coding?
An enumeration, or Enum , is a symbolic name for a set of values. Enumerations are treated as data types, and you can use them to create sets of constants for use with variables and properties.
Can you use enumerate on an array?
There several ways to loop through an array in Swift, but using the enumerated() method is one of my favorites because it iterates over each of the items while also telling you the items’s position in the array.
How many digits are used in enumeration?
10 digits are used in enumeration. In fact, the word “decimal” is derived from “dec” which means ten. The 10 digits are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. The combinations of these ten digits by placing them at different positions with repetitions sometimes can form a range of different numbers.
What is the difference between the constant and enumeration?
You can use constants to provide meaningful names, instead of numbers, making your code more readable. Enumerations provide a convenient way to work with sets of related constants, and to associate constant values with names.
What is lazy in Swift?
A lazy var is a property whose initial value is not calculated until the first time it’s called. It’s part of a family of properties in which we have constant properties, computed properties, and mutable properties.