Delphi Constant Set
No information is available for this page.Learn why. One of the Delphi language features not found in other modern languages is the notion of sets. Delphi's set type is a collection of values of the same ordinal type. Set types are usually defined with subranges. In the above example, the TMagicNumber is a custom subrange type allowing variables of.
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Delphi Basics: Enumerations, SubRanges and Sets Enumerations, SubRanges and Sets Documents Tutorials Sets and enumerations References Articles Author links Buy Website Traffic at Buy Proxies at Enumerations, SubRanges and Sets Enumerations The provision of enumerations is a big plus for Delphi. They make for readable and reliable code. Fast and furious 8 123movies. An enumeration is simply a fixed range of named values. For example, the Boolean data type is itself an enumeration, with two possible values: True and False. Avatar book 3 fire. If you try to assign a different value to a boolean variable, the code will not compile. Defining enumerations When you want to use an enumeration variable, you must define the range of possible values in an enumeration type first (or use an existing enumeration type, such as boolean).
Delphi Constant Settings
Here is an example: type TSuit = (Hearts, Diamonds, Clubs, Spades); // Defines enumeration range var suit: TSuit; // Defines enumeration variable begin suit:= Clubs; // Set to one of the values end; The TSuit type definition creates a new Delphi data type that we can use as a type for any new variable in our program. (If you define types that you will use many times, you can place them in a Unit file and refer to this in a statement in any program that wants to use them). We have defined an enumeration range of names that represent the suits of playing cards. We have also defined a suit variable of that TSuit type, and have assigned one of these values. Note that there are no quote marks around these enumeration values - they are not strings, and they take no storage.
Delphi Define Constant Set
In fact, each of the enumeration values is equated with a number. The TSuit enumeration will have the following values assigned: Hearts = 0, Diamonds = 1, Clubs = 2, Spades = 3 And you can use these values instead of the enumeration values, although this loses many of the benefits of enumerations.