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Difference between revisions of "Declaring data"
(→Values of simple reference types) |
(→Values of type List) |
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// declares a list of 4 strings by use of a set-values block | // declares a list of 4 strings by use of a set-values block | ||
− | + | departurePhrase STRING[] = ["goodbye", "ciao"]; | |
+ | |||
+ | // assigns the first index in the array to "au revoir" | ||
+ | departurePhrase[1] = "au revoir"; | ||
− | // assigns the | + | // assigns the last index in the list to "auf wiedersehen". |
− | + | departurePhrase[departurePhrase.getSize()] = "auf wiedersehen."; | |
− | // | + | // initializes a list of 3 integers |
− | + | integerList INT[] = [1,2,3]; | |
− | // | + | // initializes a list of 2 booleans |
− | // but the name cannot refer to another list. | + | booleanList BOOLEAN[] = [ (10000 > 50000), (10000 < 50000) ]; |
+ | |||
+ | initializes a 2-dimensional list; that is, a list of lists | ||
+ | the2Dimension INT[][] = [[1,2],[3,4]]; | ||
+ | |||
+ | // creates a value in which the element values are changeable, | ||
+ | // but the name MINIMUMNUMBERS cannot refer to another list. | ||
const MINIMUMNUMBERS INT[] = [1,2,3,4,5]; | const MINIMUMNUMBERS INT[] = [1,2,3,4,5]; | ||
Revision as of 17:55, 8 February 2012
EGL native types are in three categories:
- BigInt, Date, Decimal(n), Decimal(n, p),
- Float, Int, SmallFloat, SmallInt, Timestamp(pattern)
- Decimal, Number, String (now a value type),
- Timestamp (now a value type)
- Other reference types:
Note:
- The as operator casts a value from one type to another.
- The isa operator tests whether a value is of a given type.
See also Working with custom types.
Contents
Values of simple value types
/** Character value types. **/ /** Note: String without parameter will be a reference type in EDT 1.0. **/ // Defaults to an empty string. firstName String; // Defaults to null. secondName String?; // Initializes value to "John" and allows a future value to be null. thirdName String? = "John"; // Initializes the value, which is unchangeable. // Note: the elements of constant lists and dictionaries are changeable.) const LANGUAGE String = "EGL"; /** Numeric value types. **/ // Defaults to 0. someVal Int; // Defaults to 0.0. coord Float; // Initializes value to 4.5 distance Float = 4.5; // Initializes value to 4 newDistance int = distance as int; // Defaults to 000.00. // Can hold 5 digits total, with 2 after the decimal point. amount Decimal(5,2); /** Date-and-time value types. **/ // Defaults to today's date. today Date; // Initializes the date to 30 January 2015. future Date = "01/30/2015"; // Defaults to now. the second declaration uses the default pattern. now TIMESTAMP("ddHHmmssffffff"); later TIMESTAMP("yyyyMMddHHmmss"); /** Boolean type **/ // Defaults to false. toggle Boolean;
Values of simple reference types
Values of type Any
Values of type Dictionary
Values of type List
// declares a new list, disallowing nulls. vals Int[]; // declares a new list, allowing nulls. nullVals Int[]; // declares a new list, adds 30 elements, and initializes each element to zero. newVals Int[] = new Int[30]; // declares a list of 4 strings by use of a set-values block departurePhrase STRING[] = ["goodbye", "ciao"]; // assigns the first index in the array to "au revoir" departurePhrase[1] = "au revoir"; // assigns the last index in the list to "auf wiedersehen". departurePhrase[departurePhrase.getSize()] = "auf wiedersehen."; // initializes a list of 3 integers integerList INT[] = [1,2,3]; // initializes a list of 2 booleans booleanList BOOLEAN[] = [ (10000 > 50000), (10000 < 50000) ]; initializes a 2-dimensional list; that is, a list of lists the2Dimension INT[][] = [[1,2],[3,4]]; // creates a value in which the element values are changeable, // but the name MINIMUMNUMBERS cannot refer to another list. const MINIMUMNUMBERS INT[] = [1,2,3,4,5]; // declares another list of strings. cities String[]; // appends a new value to the end of the list. cities.appendElement("Delta"); // appends two new values to the end of the list. cities.appendAll([ "Denver", "Pueblo" ]); // removes the second value in the list. removeElement(2); // removes all values from the list. cities.removeAll();