traversal

问题 Given I have an array of "purpose" objects: //array of purpose objects: var purposeObjects = [ {purpose: "daily"}, {purpose: "weekly"}, {purpose: "monthly"} ]; (for simplicity i am omitting other attributes) Now I want to have a method that returns a specific one of the objects if a matching purpose name is found. This is not working: function findPurpose(purposeName){ return $.grep(purposeObjects, function(){ return this.purpose == purposeName; }); }; findPurpose("daily"); but it actually

问题 I know individual attributes can be retrieved with the attr() method, but I'm trying to iterate over all of the attributes for an element. For context, I'm using jQuery on some XML... <items> <item id="id123" name="Fizz" value="Buzz" type="xyz"> <subitem name="foo"> <subitem name="bar"> </item> <item id="id456" name="Bizz" value="Bazz" type="abc"> <subitem name="meh"> <subitem name="hem"> </item> </items> I am already able to iterate over the items with... $(xml).find('item').each(function()

问题 Consider the situation where you have two lists of nodes of which all you know is that one is a representation of a preorder traversal of some tree and the other a representation of a postorder traversal of the same tree. I believe it is possible to reconstruct the tree exactly from these two lists, and I think I have an algorithm to do it, but have not proven it. As this will be a part of a masters project I need to be absolutely certain that it is possible and correct (Mathematically proven

问题 I am trying to get my data which is hierarchically set up with a tree traversal model into an < ul> in order to show on my site. Here is my code: function getCats($) { // retrieve all children of $parent $query = "SELECT max(rght) as max from t_categories"; $row = C_DB::fetchSingleRow($query); $max = $row["max"]; $result ="<ul>"; $query = "SELECT * from t_categories where lft >=0 and rght <= $max"; if($rs = C_DB::fetchRecordset($query)){ $p_right =""; $p_left =""; $p_diff=""; while($row = C

问题 here's the rough html I get to work with: <li class="par_cat"></li> <li class="sub_cat"></li> <li class="sub_cat"></li> <li class="par_cat"></li> // this is the single element I need to select <li class="sub_cat"></li> <li class="sub_cat"></li> <li class="sub_cat current_sub"></li> // this is where I need to start searching <li class="par_cat"></li> <li class="sub_cat"></li> <li class="par_cat"></li> I need to traverse from the .current_sub , find the closest previous .par_cat and do stuff to

问题 I have a dictionary like this: { "id" : "abcde", "key1" : "blah", "key2" : "blah blah", "nestedlist" : [ { "id" : "qwerty", "nestednestedlist" : [ { "id" : "xyz", "keyA" : "blah blah blah" }, { "id" : "fghi", "keyZ" : "blah blah blah" }], "anothernestednestedlist" : [ { "id" : "asdf", "keyQ" : "blah blah" }, { "id" : "yuiop", "keyW" : "blah" }] } ] } Basically a dictionary with nested lists, dictionaries and strings, of arbitrary depth. What is the best way of traversing this to extract the

问题 I'm having problems with traversing all descendants of an object. The 'unit' in the code below is of type Unit in my program. It has a property ChildUnits which returns a List<Unit> of the children of the unit. I can successfully perform operations on the children. Then I check if those children have children, and if they do I can perform operations on them as well. However, I need to check all descendants in case there is more depth than just grandchildren. I had a go with while loops in

问题 I'm using Pyramid and got a strange issue. I do an ajax request AR in view A. If the request is done, the user is redirected to view B. If the user goes back to A, the ajax request AR will fail, because pyramid does not find any view for the request. If someone needs code, I'll post it ;-) Thx & Greetings Tobias Edit: Snippet of my init .py # adding all routes config.add_static_view('static', 'static', cache_max_age=3600) config.add_route('main_page', '/') config.add_route('main_contact', '

问题 Using JQuery or Javascript how would I return 'Mary Boone' from the xml below starting out with the show 'id' attribute of '2'? I'm thinking something along the lines of - var result = xml.getElementByAttribute("2").gallery.text(); the XML: <shows> <show id="1"> <artist>Andreas Gursky</artist> <gallery>Matthew Marks</gallery> <medium>photography</medium> </show> <show id="2"> <artist>Eric Fischl</artist> <gallery>Mary Boone</gallery> <medium>painting</medium> </show> </shows> 回答1: With jQuery

问题 I will like to speed the process of traversing a tree. Here is an example of a node: class Node { public List<Node> Children { get; set; } public int SompeProperty { get; set; } public String SomeOtherProperty { get; set; } } the way I traverse the try is like: static void TraverseTree(Node ParentNode) { if (ParentNode.Children == null) return; foreach (var child in ParentNode.Children) { TraverseTree(child); } } the ParentNode.Children method takes about 1 millisecond because a Node