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Difference between revisions of "EDT:Code snippets"
m (→Arrays) |
m (→Arrays) |
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<source lang="java"> | <source lang="java"> | ||
− | vals int[]; // dynamic array of size 0 | + | vals int[]; // new dynamic array of size 0 |
− | vals int[]?; // dynamic array, but | + | vals int[]?; // dynamic array, but not instantiated (vals must be instantiated before it can be accessed) |
− | vals int[] = new int[4]; // new array of size 4 | + | vals int[] = new int[4]; // new dynamic array of size 4; all values set to their default value (0 in this example) |
− | names string[] = [ "Paul", "John", "George", "Ringo" ]; // dynamic array, initialized with 4 values | + | names string[] = [ "Paul", "John", "George", "Ringo" ]; // dynamic array, initialized with 4 values |
− | names[1] = "Bob"; | + | names[1] = "Bob"; // assigns the first index in the array to "Bob" |
− | names[names.getSize()] = "Ken"; | + | names[names.getSize()] = "Ken"; // assigns the last index in the array to "Ken" |
− | cities string[]; | + | cities string[]; // new dynamic array of size 0 |
cities.appendElement("Delta"); // appends a new value to the end of the array | cities.appendElement("Delta"); // appends a new value to the end of the array | ||
− | cities.appendAll([ "Denver", "Pueblo" ]); // appends | + | cities.appendAll([ "Denver", "Pueblo" ]); // appends two new values to the end of the array |
+ | cities.removeElement(2); // removes the second value in the array | ||
+ | cities.removeAll(); // removes all values from the array | ||
</source> | </source> |
Revision as of 16:14, 4 February 2012
Real code for real people!
Please share your code snippets!
Contents
General
Variable declarations
someVal int; // defaults to 0 someVal int?; // defaults to null someVal int? = 15; // initializes value to 15 (future value can be null) someVal int = 23; // initializes value to 23 firstName string; // defaults to "" firstName string?; // defaults to null firstName string = "John"; // initializes value to "John" largeVal bigint; // defaults to 0 amount decimal(5,2); // number with 5 total digits (2 after the decimal point). Defaults to 000.00; coord float; // defaults to 0.0 toggle boolean; // defaults to false dob date; // defaults to today's date ts timestamp?; x any?; // value can be set to any value (primitive, object, etc). See casting examples below.
Constant declaration
const NUMBEROFDAYS INT = 7;
Arrays
vals int[]; // new dynamic array of size 0 vals int[]?; // dynamic array, but not instantiated (vals must be instantiated before it can be accessed) vals int[] = new int[4]; // new dynamic array of size 4; all values set to their default value (0 in this example) names string[] = [ "Paul", "John", "George", "Ringo" ]; // dynamic array, initialized with 4 values names[1] = "Bob"; // assigns the first index in the array to "Bob" names[names.getSize()] = "Ken"; // assigns the last index in the array to "Ken" cities string[]; // new dynamic array of size 0 cities.appendElement("Delta"); // appends a new value to the end of the array cities.appendAll([ "Denver", "Pueblo" ]); // appends two new values to the end of the array cities.removeElement(2); // removes the second value in the array cities.removeAll(); // removes all values from the array
Rich UI
Services
Dynamic URI
http HttpRest{request.uri="http:host\\myService"}; srvc IRest?; srvc = ServiceLib.completeBind(srvc, http);
HTTP Request Headers
http HttpRest{}; http.request.headers = new Dictionary{key1="a value to pass to my service"}; srvc IRest?{@Resource {}}; srvc = ServiceLib.completeBind(srvc, http);
HTTP Request and Response
function invokeDoSomething() call srvc.doSomething() returning to serviceCallback; end function serviceCallback(returnValueOne String, callbackHttp IHTTP in) // process callback request or response end
Database access
Record definition
record CUSTOMER type Entity{@table{name = "CUSTOMER"}} NAME string COUNTRY string{@id}; STATE string?; CUSTID string; end
Get a record
function getCust{id String in} returns (Customer) ds SQLDataSource?{@resource {}}; aCust Customer; get aCust from ds using(id); return (aCust); end
Add a record
function addCust{customer Customer in} ds SQLDataSource?{@resource {}}; add customer to ds; end
Loop through a SQL result set
function loopCust() ds SQLDataSource?{@resource{bindingkey = "MyDB"}}; rs SQLResultSet?; open rs from ds with #sql{ SELECT * FROM CUSTOMER }; myCust Customer; //Loop through results and write out customer name while(rs.getNext()) get myCust from rs; Syslib.writeStdOut ("Customer name: " + myCust.name); end end
Edit this page by logging in to eclipse.org and clicking the Edit tab. Use the Wikitext editor to add a new snippet. Add the title using Heading 4. Use the source lang="java" tag to provide a background for your snippet and some syntax highlighting.