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If I have a type defined as a set of an enumerated type, it's easy to create an empty set with [], but how do I create a full set?
EDIT: Yeah, the obvious solution is to use a for loop. That's also a really bad solution if there's another way. Does anyone know of a way that'll work in constant time?
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Delphi's set type is a collection of values of the same ordinal type. A set is defined using the set of keyword: Set types are usually defined with subranges.
Delphi provides modern full text and graphics printing facility. We can print texts, images and shapes in different formats by using several Delphi classes and members. We can also access printers installed on system and can change their properties Print and printer setup dialog in Delphi.
Delphi ordinal types include character and boolean values. To prevent users to type alpha keys, add this line in the OnKeyPress of an edit control: A commonly used scenario in Delphi code is to mix both enumerated types and set types. Question: will the message be displayed?
Such an array is referred to as an Open array. Delphi passes the length as a hidden parameter to the subroutine. An open array may also be defined with const value type. This is called a Variant open array - it is mostly used to allow a variable number of argument value to be passed to a subroutine.
Low() and High() are "compiler magic" functions that can be evaluated at compile time. This allows their use in constant declarations like the following:
var MySet : TBorderIcons; MySet2 : TBorderIcons; const AllIcons : TBorderIcons = [Low(TBorderIcon)..High(TBorderIcon)]; begin MySet := [Low(TBorderIcon)..High(TBorderIcon)]; MySet2 := AllIcons; end;
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