Hello, I decided to study some logic programming and I stumbled across a problem. It is programmed in SWI Prolog. test(A, B, N):- nonvar(B), B = final, true. test(A, B, N):- N > 2, test(A, final, N). test(A, B, N):- N1 is N + 1, test(N1, B, N1). It is just a sample with no real use except it is driving me crazy. The problem ...
Hi, what are the two stars in a list? [53, 5, 1, 53, 97, 115, 53, 50, 52, 121, 55, 56, 55, 97, 4, 1, 98, **] I tried searching but no success. Thanks, Jan ...
I want to show the number of viewer for a particular Article. How i will do it in my program? Any strategy, someone can suggest ... ...
How would I go about converting this if statement: for($i = 1; $i < $argc; $i++) { ... if(in_array($argv[$i], array('-V', '--version'))) { $displayVersion = TRUE; } ... } Into a switch case without needing to write two switch statements? ...
Is there a tool to draw out logic gates / the circuit diagram from a textual description of those gates (such as HDL)? Thank you. ...
So I ran into a situation today where some production code was failing precisely because a method performed exactly as documented in MSDN. Shame on me for not reading the documentation. However, I'm still scratching my head as to why it behaves this way, even if "by design", since this behavior is exactly opposite what I would have exp...
Hi everyone, Even describing this problem is hard, But I'll give it a go. I've been struggling with this for a few days and decided to ask here. OK, so I'm trying to model "concepts", or "things" as I call them. Just concepts in general. It's to do with processing logic. So, each "thing" is defined by it's relationship to other things...
Does the VB.NET 2008 compiler selectively optimize Select Case Statements? For example, a Select Case Statement with a sufficient quantity of integer cases could be organized as a binary search. I ask this because I am curious whether or not I should opt for a Select Case in place of If Statements with multiple Else If's where integer...
I'm writing a program that deciphers sentences, syllables, and words given in a basic text file. The program cycles through the file character by character. It first looks if it is some kind of end-of-sentence marker, like ! ? : ; or . Then if the character is not a space or tab, it assumes it is a character. Finally, it identifies tha...
Riddle me this... in the while($row = mysql_fetch_assoc($result) and $runningOK) loop, if the PHP && operator is used in place of the and the mysql_fetch_assoc fails terrible and returns just the number 1 when running. I've tried mysql_fetch_array() and in place and I still have the 1 problem. It is when, and only when, I replace the && ...
This is not a homework question, but rather my intention to know if this is what it takes to learn programming. I keep loggin into TopCoder not to actually participate but to get the basic understand of how the problems are solved. But to my knowledge I don't understand what the problem is and how to translate the problem into an algorit...
I've got an SQL query that pieces together historic price information. It's not particularly clean and could probably be optimized a great deal. One reason for this is that I use a subquery to grab the 'previous' price value via a subquery and assign it to the alias 'last_value'. Ideally, I'd like to be able to use this alias in the quer...
Let's take a simple example of an object "Cat". I want to be sure the "not null" cat is either orange or grey. if(cat != null && cat.getColor() == "orange" || cat.getColor() == "grey") { //do stuff } I believe AND comes first, then the OR. I'm kinda fuzzy though, so here are my questions: 1) Can someone walk me through this state...
I am wondering if there is a way to have "OR" logic in jQuery selectors. For example, I know an element is either a descendant of an element with class classA or classB, and I want to do something like elem.parents('.classA or .classB'). Does jQuery provide such functionality? ...
Possible Duplicate: How to Think in OO I am sort of new to programming. I am working with Objective-C and iPhone app Dev. I am having some trouble wrapping my mind around the OOP mindset. Does anyone have any tips or tricks to think or visualize the programming process before you sit down and start it? ...
I am looking for a library/assembly that allows me to work with logical variables in F#. I want to avoid reinventing the wheel in implementing the required union-find datastructure, unification code and so on. I have found Prolog.NET, but the manual is a bit sparse. I do not want a full-fledged Prolog implementation, but only its treatm...
Hi guys, I'm currently looking into ruleML and I was wondering if maybe someone could give me a short list of advantages and disadvantages about it? Thanks ...
I'd like to create an application that can do simple reasoning using first order logic. Can anyone recommend an "engine" that can accept an arbitrary number of FOL expressions, and allow querying of those expressions (preferably accessible via Python)? ...
In Python 2.6.4: >> ''>0 True Why is that? ...
I'm having trouble simplifying this conditional statements logic. Is there a more effervescent way of writing this? if(($x || $a) && ($x || $y)) { if($x){ return true; } } return false; ...