traversal

I'm trying to find the next element with a class of "error" and hitting a wall. In looking at the demo on jQuery's site, this should work, but doesn't. $("button[disabled]").next().text("this button is disabled"); <div> <button disabled="disabled">First</button> <span>no overwrite</span> <span class="error"></span> </div> <div> <button>Second</button> <span></span> </div> <div> <button disabled="disabled">Third</button> <span>no overwrite</span> <span class="error"></span> </div> I'm trying to find the span or div or whatever after the element in question, like the button above. so the

In Eric Torreborre's blogpost on the paper Essence of the Iterator Pattern , he describes how the cartesian product of a traverse is also a traverse. Can anyone show me an example of this using the scalaz library as I can't figure it out. Let's say the problem is that, for a List[Int] I want to provide both of: The Int sum of the elements in the list A List[String] the elements of which are created by appending the "Z" to the String representation of the Int s My understanding is that I can do this using traverse but in such a way as to only actually traverse my structure once, unlike this

I want to connect to computers, each one of them behind a NAT router. I read that STUN only works with one computer behind a NAT router. Is that true? If so, how can I solve that double-NAT problem? Thanks, Thomas UDP hole punching and TCP hole punching TURN is a set of extensions to STUN that help to solve the double-NAT problem. You still need a server in the cloud, and the clients need to register. Source for some free servers is available . From the TURN internet draft: As described in [RFC5128] and [RFC4787], hole punching techniques will fail if both hosts are behind NATs that are not

I would like to select the start and end selector for the prevUntil() or nextUntil() jQuery selector methods. If I implement these methods now, it grabs everything between the two selectors given. i.e. $('p').prevUntil('h1') will not include the p and h1 element, only those between them. How could I also select the p and h1 elements as well as though between? David Fullerton Take a look at the .addBack method to add the results of the previous selector to the current matches. Combining that with the .prev method seems to do the trick: $('p').prevUntil('h1').addBack().prev('h1').addBack(); 来源：

So I have been looking into implementing a lowest common ancestor algorithm. I looked at many different algorithms (mainly variations of Trajan's solution or variations of the RMQ). I am using a non-binary tree. My tree will often change between queries and therefore pre-processing wouldn't necessarily be worthwhile. The tree shouldn't have more than 50-75 nodes. What I am wondering is whether I should bother using their algorithms or just stick with my own. My Algorithm myLCA(node1, node2) { parentNode := [ ] while (node1!=NULL) { parentNode.push(node1) node1 := node1.parent } while (node2!

How to traverse each node of a tree efficiently without recursion in C (no C++)? Suppose I have the following node structure of that tree: struct Node { struct Node* next; /* sibling node linked list */ struct Node* parent; /* parent of current node */ struct Node* child; /* first child node */ } It's not homework. I prefer depth first. I prefer no additional data struct needed (such as stack). I prefer the most efficient way in term of speed (not space). You can change or add the member of Node struct to store additional information. If you don't want to have to store anything, and are OK

How do I get this piece to follow symlinks in python 2.6? def load_recursive(self, path): for subdir, dirs, files in os.walk(path): for file in files: if file.endswith('.xml'): file_path = os.path.join(subdir, file) try: do_stuff(file_path) except: continue Set followlinks to True . This is the fourth argument to the os.walk method, reproduced below: os.walk(top[, topdown=True[, onerror=None[, followlinks=False]]]) This option was added in Python 2.6. 来源： https://stackoverflow.com/questions/3771696/python-os-walk-follow-symlinks