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back button callback in navigationController in iOS
...ent handler
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@”back”
style:UIBarButtonItemStyleBordered
target:self
action:@selector(handleBack:)];
self.navigationItem.leftBarButtonItem = backButton;
[backButton release];
}
- (void) handleBack:(id)sender
{
// pop to root vi...
How to query as GROUP BY in django?
...ass BookQuerySet(QuerySet, GroupByMixin):
pass
class Book(Model):
title = TextField(...)
author = ForeignKey(User, ...)
shop = ForeignKey(Shop, ...)
price = DecimalField(...)
class GroupedBookListView(PaginationMixin, ListView):
template_name = 'book/books.html'
model ...
Are nested span tags OK in XHTML?
...1999/xhtml" lang="en" xml:lang="en">
<head>
<title>Title</title>
</head>
<body>
<p>
<span>Test<span>Nest span</span></span>
</p>
</body>
&l...
How to make a Bootstrap accordion collapse when clicking the header div?
... fill all the space of the panel-heading. Use this style to do so:
.panel-title a {
display: block;
padding: 10px 15px;
margin: -10px -15px;
}
Check this demo (http://jsfiddle.net/KbQyx/).
Then when you clicking on the heading, you are actually clicking on the <a>.
...
How to add Options Menu to Fragment in Android
...droid.com/apk/res/android">
<item android:id="@+id/exit" android:title="Exit" android:icon="@drawable/ic_action_cancel" />
<item android:id="@+id/refresh" android:title="Refresh" android:icon="@drawable/ic_action_refresh" />
</menu>
...
MongoDB/NoSQL: Keeping Document Change History
...ent could look something like this:
{
_id: "4c6b9456f61f000000007ba6"
title: [
{ version: 1, value: "Hello world" },
{ version: 6, value: "Foo" }
],
body: [
{ version: 1, value: "Is this thing on?" },
{ version: 2, value: "What should I write?" },
{ version: 6, value: "T...
Rendering a template variable as HTML
...ark_safe
register = template.Library()
@register.filter
def do_something(title, content):
something = '<h1>%s</h1><p>%s</p>' % (title, content)
return mark_safe(something)
Then you could add this in your template file
<body>
...
{{ title|do_something:c...
Basic example of using .ajax() with JSONP?
...
<!DOCTYPE html>
<html lang="en">
<head>
<title>JQuery (cross-domain) JSONP Twitter example</title>
<script type="text/javascript"src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script>
...
MongoDB: Combine data from multiple collections into one..how?
...books, having the following data:
{
"isbn": "978-3-16-148410-0",
"title": "Some cool book",
"author": "John Doe"
}
{
"isbn": "978-3-16-148999-9",
"title": "Another awesome book",
"author": "Jane Roe"
}
And the second collection, called books_selling_data, having the follow...
What is the proper way to re-attach detached objects in Hibernate?
... -> {
Book book = new Book()
.setIsbn("978-9730228236")
.setTitle("High-Performance Java Persistence")
.setAuthor("Vlad Mihalcea");
entityManager.persist(book);
return book;
});
While the entity is in the detached state, we modify it as follows:
_book.setTitle(
"H...