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Difference between revisions of "Declaring data"
(→Values of simple value types) |
(→Values of simple value types) |
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<source lang="java"> | <source lang="java"> | ||
/* Character value types. */ | /* Character value types. */ | ||
| − | /* Note: String | + | /* Note: String without parameter will be a reference type in EDT 1.0. */ |
// defaults to "". | // defaults to "". | ||
| Line 36: | Line 36: | ||
// defaults to null. | // defaults to null. | ||
| − | + | secondName String?; | |
// initializes value to "John". | // initializes value to "John". | ||
| − | + | thirdName String = "John"; | |
| Line 48: | Line 48: | ||
// defaults to null. | // defaults to null. | ||
| − | + | otherVal SmallInt?; | |
// initializes the value to 15 and allows a future value to be null. | // initializes the value to 15 and allows a future value to be null. | ||
| − | + | newerVal BigInt? = 15; | |
// initializes the value, which is unchangeable. | // initializes the value, which is unchangeable. | ||
| Line 63: | Line 63: | ||
amount Decimal(5,2); | amount Decimal(5,2); | ||
| − | /* | + | /* Date-and-time value types. */ |
// defaults to today's date. | // defaults to today's date. | ||
| − | + | today Date; | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| + | // defaults to now. the second declaration uses the default pattern. | ||
| + | now TIMESTAMP("ddHHmmssffffff"); | ||
| + | later TIMESTAMP("yyyyMMddHHmmss"); | ||
| + | /* Boolean type */ | ||
// defaults to false | // defaults to false | ||
toggle Boolean; | toggle Boolean; | ||
| − | |||
| − | |||
| − | |||
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// value can be set to any value (simple value, object, and so on). See the casting examples later. | // value can be set to any value (simple value, object, and so on). See the casting examples later. | ||
Revision as of 13:11, 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. */ /* Note: String without parameter will be a reference type in EDT 1.0. */ // defaults to "". firstName String; // defaults to null. secondName String?; // initializes value to "John". thirdName String = "John"; /* Numeric value types. */ // defaults to 0. someVal Int; // defaults to null. otherVal SmallInt?; // initializes the value to 15 and allows a future value to be null. newerVal BigInt? = 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); /* Date-and-time value types. */ // defaults to today's date. today Date; // defaults to now. the second declaration uses the default pattern. now TIMESTAMP("ddHHmmssffffff"); later TIMESTAMP("yyyyMMddHHmmss"); /* Boolean type */ // defaults to false toggle Boolean; // value can be set to any value (simple value, object, and so on). 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];