abstraction

Let me make something quite clear. I. Hate . CSS. It is a never-ending nightmare. Every minor layout change feels like a hack. Solutions to problems seem to often involve jiggering numbers around like some chef trying to work out exactly how much nutmeg to put in his soon-to-be famous rice pudding. Then comes the multiple browser issue, the multiple resolution issues.. .. to cut a long story short, it's a pain. A PITA, if you will. Many frameworks seek to abstract away from HTML (custom tags, JSFs component system) in an effort to make dealing with that particular kettle of fish easier. Is

I am developing a complex data structure in Clojure with multiple sub-structures. I know that I will want to extend this structure over time, and may at times want to change the internal structure without breaking different users of the data structure (for example I may want to change a vector into a hashmap, add some kind of indexing structure for performance reasons, or incorporate a Java type) My current thinking is: Define a protocol for the overall structure with various accessor methods Create a mini-library of functions that navigate the data structure e.g. (query-substructure-abc

I am Peter Pilgrim. I watched Martin Odersky create a control abstraction in Scala. However I can not yet seem to repeat it inside IntelliJ IDEA 9. Is it the IDE? package demo class Control { def repeatLoop ( body: => Unit ) = new Until( body ) class Until( body: => Unit ) { def until( cond: => Boolean ) { body; val value: Boolean = cond; println("value="+value) if ( value ) repeatLoop(body).until(cond) // if (cond) until(cond) } } def doTest2(): Unit = { var y: Int = 1 println("testing ... repeatUntil() control structure") repeatLoop { println("found y="+y) y = y + 1 } { until ( y < 10 ) } }

define('anActionType', 1); $actionTypes = array(anActionType => 'anActionType'); class core { public $callbacks = array(); public $plugins = array(); public function __construct() { $this->plugins[] = new admin(); $this->plugins[] = new client(); } } abstract class plugin { public function registerCallback($callbackMethod, $onAction) { if (!isset($this->callbacks[$onAction])) $this->callbacks[$onAction] = array(); global $actionTypes; echo "Calling $callbackMethod in $callbacksClass because we got {$actionTypes[$onAction]}" . PHP_EOL; // How do I get $callbacksClass? $this->callbacks[$onAction

with MongoDB (and I assume other NoSQL database APIs worth their salt) the ways of querying the database are much more simplistic than SQL. There is no tedious SQL queries to generate and such. For instance take this from mongodb-csharp: using MongoDB.Driver; Mongo db = new Mongo(); db.Connect(); //Connect to localhost on the default port. Document query = new Document(); query["field1"] = 10; Document result = db["tests"]["reads"].FindOne(query); db.Disconnect(); How could an ORM even simplify that? Is an ORM or other "database abstraction device" required on top of a decent NoSQL API? Well,

I know the fundamentals of OOP concepts[Inheritance, Abstraction, Encapsulation, Polymorphism] We use Inheritance in case of Parent-Child relationship[Child can have all functionalities which Parent have and can add more functionality to itself too] And we use Abstract class (In java) for a partial set of default implementations of methods in a class, which also can be implemented by simple Inheritance. Look below example which makes my point clear. Inheritance: Parent class public class Parent { // This method will remain same for all child classes.No need to override public void abc() {

Is there an ACL abstraction layer available in .net? I have seen some "best practices" documents but no good base implementation. What about the System.Security.AccessControl? Is this a good starting point? The ACL's should work with Roles stored in DB as well as Roles by the system and for in-memory-object definitions as well as db objects or files. So it should be generic and/or easy to extend. Should this rely on IPrincipal, IIdentity from the .net framework? Zend has something similar in their Framework for PHP and I am searching this kind of stuff for C# instead of porting that (if there