logic

问题 I just want to know how to define HTML Tag <br clear="all"> after each 5 iteration in foreach loop here is my code <?php $i=1; foreach($videoEntries as $data){ ?> <div class="item-main"> <div class="item"> <a href="javascript:;" onclick="ratePopup(2)" title="<?php echo $data->video_name;?>"> <div class="overlaid"></div> <img src="<?php echo $image_url;?>" width="93" height="89"/> </a> </div> <p title="Trailer Name"><strong><?php echo $data->video_name;?></strong></p> <p title="Released Date">

问题 I have two sets of data: First set: patient<-c("A","A","B","B","C","C","C","C") arrival<-c("11:00","11:00","13:00","13:00","14:00","14:00","14:00","14:00") lastRow<-c("","Yes","","Yes","","","","Yes") data1<-data.frame(patient,arrival,lastRow) Another set of data: patient<-c("A","A","A","A","B","B","B","C","C","C") availableSlot<-c("11:15","11:35","11:45","11:55","12:55","13:55","14:00","14:00","14:10","17:00") data2<-data.frame(patient, availableSlot) I want to create add a column to the

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . Do you know of any good javascript library for logic programming? I'm interested in something like jsprolog, but I want to use javascript to communicate with the lib, and not a different language (such as prolog in this case). Many thanks. 回答1: There are a bunch of other languages that compile to javascript:

问题 How would the condition be written to ensure a page is either accessed by xmlhttp request from my site or from an allowed outside domain? <?php $referrer = $_SERVER['HTTP_REFERER']; if($_SERVER["HTTP_X_REQUESTED_WITH"] !== 'XMLHttpRequest') { if(preg_match("/accepteddomain.com/",$referrer) { header("Location: http://www.domain.com/desiredpage.php"); } else { header("Location: http://www.domain.com/nondesiredpage.php"); } } ?> 回答1: Considering that both Referer and X-Request-With headers are

问题 Hi I have some puzzles about event and when in Modelica. Below is my code: model test Integer bar(start=5, fixed=true); equation when (time < 2) then bar = 1; end when; annotation(experiment(StopTime=3)); end test; My question is why I got 5 instead of 1 when time is less than 2? How can I understand the event(time < 2) in this case? What is the difference of when clause in Modelica and other programming language, like c. 回答1: Tobias' answer is correct. But I think for beginners it might be a

问题 So far I have this code for a 2-bit comparator. module twobitcomparator(xgtyin,xety,xltyin,x1,x0,y1,y0,xgty,xety,xlty); //I/O output xgty, xety, xlty; //xgty - x>y, xlty - x<y, xety - x=y input x1, x0, y1, y0, xgtyin, xetyin, xltyin; //specify circuit behavior assign r = (xgyin); assign s = (xlyin); assign t = (xetyin);//not sure if I need an xetyin assign a = (x1&~y1); assign b = (x1&x0&~y0); assign c = (x0&~y1&~y0); assign xgty = (a|b|c|r);//X>Y assign d = (~x0&~y0); assign e = (x0&y0);

问题 I'm studying for an exam, and I'm not really sure how to portray this: The domain is all people. V (w) = w is a voter P (w) = w is a politician K (y, z) = y knows z T (y, z) = y trusts z Cal is a voter who knows everyone. (Cal is c) Would this be: ∀x V(c)^K(c,x) There is a politician that no other politician trusts ∃x∀y P(x)^P(y)^T(y,x) I'm not sure if those are right. Wouldn't the last one be saying: There are politicians that no one trusts? How do I make it singular? Also: No one trusts

问题 I will like to know if anyone has an idea on the concept behind point to point route generation on google maps and nokia maps. What logic was used to determine the route and generate directions from any point on the map to another? I wouldn't mind guesses or something of that sort. I just want to understand, how it works. 回答1: This is just a guess, but probably something like Dijkstra's algorithm. It most likely is some kind of graph-search algorithm, with each node representing an

问题 As of right now I check if a user can login in this manner: // simply logic: if (username == usernameEntered && password == passwordEntered) { My database has an entry of Aaron within my user's table. But if I try to login as aaron or AARON etc. It will deny me access. So it seems it is case sensitive. Is this a problem with my database or how I'm checking for login credentials? I remember back when I fiddled with JavaScript, /values/i could be used for case insensitivity. Is there something

问题 I'm finding difficult to understand how the ´&´ operator works in relation to this code: for(int cnt = 0; cnt < (1 << somelist.Count()); ++cnt) { for (int i = 0; i < somelist.Count(); ++i) { // 1 << 0 -- 1 -> 1 // 1 << 1 -- 10 -> 2 // 1 << 2 -- 100 -> 4 // 1 << 3 -- 1000 -> 8 // 1 << 4 -- 10000 -> 16 // 1 << 5 -- 100000 -> 32 var l = (1 << i); if ((cnt & l) == 0) { // when is it getting here? // some code to execute } } } which ones are the cases when it enters the if condition and those