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Difference between revisions of "Declaring data"
(→Values of simple value types) |
(→Values of type List) |
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| Line 118: | Line 118: | ||
== Values of type List == | == Values of type List == | ||
| − | |||
| − | |||
<source lang="java"> | <source lang="java"> | ||
| − | + | // new dynamic array of size 0 | |
| − | vals Int[] | + | vals Int[]; |
| − | vals Int[] | + | |
| + | // dynamic list, but not instantiated (vals must be instantiated before it can be accessed) | ||
| + | vals Int[]?; | ||
| + | |||
| + | // new dynamic array of size 4; all values set to their default value (0 in this example) | ||
| + | vals Int[] = new Int[4]; | ||
| + | |||
| + | // dynamic array, initialized with 4 values | ||
| + | names String[] = [ "Paul", "John", "George", "Ringo" ]; | ||
| + | |||
| + | // assigns the first index in the array to "Bob" | ||
| + | names[1] = "Bob"; | ||
| + | |||
| + | // assigns the last index in the array to "Ken" | ||
| + | names[names.getSize()] = "Ken"; | ||
| + | |||
| + | // new dynamic array of size 0 | ||
| + | cities String[]; | ||
| + | |||
| + | // appends a new value to the end of the array | ||
| + | cities.appendElement("Delta"); | ||
| − | + | // appends two new values to the end of the list cities. | |
| − | + | cities.appendAll([ "Denver", "Pueblo" ]); | |
| − | + | ||
| − | + | // removes the second value in the array | |
| − | + | removeElement(2); | |
| − | + | ||
| − | + | ||
| + | // removes all values from the array | ||
| + | cities.removeAll(); | ||
</source> | </source> | ||
Revision as of 12:29, 8 February 2012
EGL native types are in three categories:
- BigInt, Bytes(n), Date, Decimal(n), Decimal(n, p),
- Float, Int, SmallFloat, SmallInt, Timestamp(pattern)
- Bytes, Decimal, Number, String (now a value type),
- String(n), Timestamp (now a value type)
- Any, Dictionary, List
Your custom types are based on these EGL classifiers:
- Delegate, Enumeration, ExternalType, Handler,
- Interface, Library, Program, Record, Service
Contents
Values of simple value types
/* Character value types */ // defaults to "" and can hold 7 characters. firstName String(7); // defaults to null. firstName String?; // initializes value to "John". firstName String = "John"; /* String (without parameter) be a reference type in EDT 1.0, but not now */ // defaults to "". firstName String; // defaults to null. firstName String?; // initializes value to "John". firstName String = "John"; /* Numeric value types */ // defaults to 0. someVal Int; // defaults to null. someVal Int?; // initializes the value to 15 and allows a future value to be null. someVal Int? = 15; // initializes the value, which is unchangeable. const NUMBEROFDAYS Int = 7; // defaults to 0.0. coord Float; // defaults to 000.00. // can hold 5 digits total, with 2 after the decimal point. amount Decimal(5,2); // defaults to false toggle Boolean; // defaults to today's date. dob Date; // defaults to the current timestamp. ts Timestamp?; // value can be set to any value (primitive, object, etc). See the casting examples later. x Any?;
Values of simple reference types
Values of other reference types
Values of type Any
Values of type Dictionary
Values of type List
// new dynamic array of size 0 vals Int[]; // dynamic list, but not instantiated (vals must be instantiated before it can be accessed) vals Int[]?; // new dynamic array of size 4; all values set to their default value (0 in this example) vals Int[] = new Int[4]; // dynamic array, initialized with 4 values names String[] = [ "Paul", "John", "George", "Ringo" ]; // assigns the first index in the array to "Bob" names[1] = "Bob"; // assigns the last index in the array to "Ken" names[names.getSize()] = "Ken"; // new dynamic array of size 0 cities String[]; // appends a new value to the end of the array cities.appendElement("Delta"); // appends two new values to the end of the list cities. cities.appendAll([ "Denver", "Pueblo" ]); // removes the second value in the array removeElement(2); // removes all values from the array cities.removeAll();
Constants
// The value is not changeable. const NUMBEROFDAYS Int = 7; // The element values are changeable, but the name cannot refer to another list. const MINIMUMNUMBERS INT[] = [1,2,3,4,5];