cycle

问题 In relational database design, should one worry about one (or more) "cyclic graphs" posing problems? (Simplified) E.g., tables T1( T1_Id , ...) T2( T2_Id , T1_Id_Fk, ...) T3( T1_Id_Fk, T2_Id_Fk , ..) Primary keys are bolded. Rows in T1 have a double role. A T1 row r1 can be in relationship T3 with a row r2 in T2, but it can also be a parent row for a (possibly the same) row r2' in T2. These two relationships are orthogonal. I came up with something like this: T1_Base( T1_Id , ...) T1_Child1(

问题 I'm trying to run a JavaScript window resize script on a page with a jQuery cycle slideshow but I'm hitting some bugs I cant seem to work out. It resizes the first image fine on page load but then forgets the new height/width attributes for subsequent slides. I can set these again on before and after using jQuery but the images always flash in at full size for a brief moment before resizing. Is jQuery.cycle resizing the slides back to their native size? If so how do I stop this? $(document)

问题 Say I have a list: l = [1, 2, 3, 4] And I want to cycle through it. Normally, it would do something like this, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2... I want to be able to start at a certain point in the cycle, not necessarily an index, but perhaps matching an element. Say I wanted to start at whatever element in the list ==4 , then the output would be, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1... How can I accomplish this? 回答1: Look at itertools module. It provides all the necessary functionality. from itertools

问题 Note that a graph is represented as an adjacency list. I've heard of 2 approaches to find a cycle in a graph: Keep an array of boolean values to keep track of whether you visited a node before. If you run out of new nodes to go to (without hitting a node you have already been), then just backtrack and try a different branch. The one from Cormen's CLRS or Skiena: For depth-first search in undirected graphs, there are two types of edges, tree and back. The graph has a cycle if and only if there

问题 Note that a graph is represented as an adjacency list. I've heard of 2 approaches to find a cycle in a graph: Keep an array of boolean values to keep track of whether you visited a node before. If you run out of new nodes to go to (without hitting a node you have already been), then just backtrack and try a different branch. The one from Cormen's CLRS or Skiena: For depth-first search in undirected graphs, there are two types of edges, tree and back. The graph has a cycle if and only if there

问题 I need an example of the shortest path of a directed cyclic graph from one node (it should reach to all nodes of the graph from a node that will be the input). Please if there is an example, I need it in C++, or the algorithm. 回答1: EDIT: Oops, misread the question. Thanks @jfclavette for picking this up. Old answer is at the end. The problem you're trying to solve is called the Travelling salesman problem. There are many potential solutions, but it's NP-complete so you won't be able to solve

问题 I would like to create a graph that loop n times before going to sink. I've just created this sample that fulfill my requirements but doesn't end after going to sink and I really don't understand why. Can someone enlighten me? Thanks. import akka.actor.ActorSystem import akka.stream.scaladsl._ import akka.stream.{ActorMaterializer, UniformFanOutShape} import scala.concurrent.Future object test { def main(args: Array[String]) { val ignore: Sink[Any, Future[Unit]] = Sink.ignore val closed:

问题 I used AJAX to populate a div and then, cycle plugin it ! here is the page, and here is the code calling cycle: <script type="text/javascript"> $(function() { $("#photoviewer").load("photo-list.shtml #ani"); alert ('photo loaded!'); $(document).ready(function() { $('#ani').cycle({ fx: 'turnDown', speed: 'fast', timeout: 0, pager: '#nav' }); alert('done!'); }); }); </script> I get this error : [cycle] terminating; zero elements found by selector, but with firebug i SEE the image list as where

问题 http://www.lunatestsite.co.uk/products/lifestation Cannot for the life of me fix this. Only in IE8 so far. I had the same issue on the homepage cycle, but managed to fix by declaring width, height and background: none !important on the img's in question. I thought it might be a png issue, but the same happens with jpgs: http://www.lunatestsite.co.uk/test-disappearing-jpgs Same result: often a flicker of the first of the two images in the slideshow, then disappears. Any ideas at all

问题 http://www.lunatestsite.co.uk/products/lifestation Cannot for the life of me fix this. Only in IE8 so far. I had the same issue on the homepage cycle, but managed to fix by declaring width, height and background: none !important on the img's in question. I thought it might be a png issue, but the same happens with jpgs: http://www.lunatestsite.co.uk/test-disappearing-jpgs Same result: often a flicker of the first of the two images in the slideshow, then disappears. Any ideas at all