reverse

I've got a little question for my Android App. I searched for a long time but found nothing about my problem. Scenario : I've to display a revert listview (as Facebook Messenger). And when the user scrolls to the top, load more messages. Problem : After notifiyDataAsChanged() call, the scroll is not the same! I want to conserve exactly the same position as before loading. I tried that code : // save index and top position int index = list.getFirstVisiblePosition()+result.size(); View v = list.getChildAt(index); int top = (v == null) ? 0 : v.getTop(); // ... // restore list.setSelectionFromTop

I have seen this in some book/ tutorial. When you pass in the head pointer (of linked list) into a function, you need to pass it as a double pointer. For eg: // This is to reverse a linked list where head points to first node. void nReverse(digit **head) { digit *prev=NULL; digit *curr=*head; digit *next; while(curr!=NULL) { next=curr->next; curr->next=prev; prev=curr; curr=next; } *head=prev; return; } This works fine. It also works when I use single pointer like, void nReverse(digit *head) { digit *prev=NULL; digit *curr=head; digit *next; while(curr!=NULL) { next=curr->next; curr->next=prev

Original source: http://twitter.com/tobeytailor/status/8998006366 (x=[].reverse)() === window // true I've noticed that this behavior affects all the native types. What exactly is happening here? This is to do with the weird way this binding works in JavaScript. [].reverse is the method reverse on an empty list. If you call it, through one of: [].reverse(); []['reverse'](); ([].reverse)(); then it executes with this bound to the list instance [] . But if you detach it: x= [].reverse; x(); it executes with no this -binding, so this in the function points to the global ( window ) object, in one

Over 3 years after asking the question I found the solution. I have included it as an answer . I have an expression with modulus in it that needs to be put in terms of x. (a + x) mod m = b I can't figure out what to do with the modulus. Is there a way to get x by itself, or am I out of luck on this one? Edit : I realize that I can get multiple answers, but I'm looking for an answer that falls within the range of m. I was revisiting this question and realized it is possible based off of the answer @Gorcha gave. (a + x) mod m = b a + x = nm + b x = nm + b - a for some integer n I don't know why

I am using django 1.2 and going from one view to another using the urlresolvers reverse method. url = reverse(viewOne) and I want to pass a get parameter, for example name = 'joe' so that in the viewOne if I do def viewOne(request): request.GET['name'] I will get joe how do I do that ? GET parameters have nothing to do with the URL as returned by reverse . Just add it on at the end: url = "%s?name=joe" % reverse(viewOne) A safer and more flexible way: import urllib from django.core.urlresolvers import reverse def build_url(*args, **kwargs): get = kwargs.pop('get', {}) url = reverse(*args, *