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Create empty queryset by default in django form fields
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In the use case that your queryset changes in your view based on url parameters. Then in your view you set the correct queryset like so: edit_form.fields["asset"].queryset = Asset.objects.filter(location_id=location_id)
– radtek
May 13 '14 at...
Resizing UITableView to fit content
...out KVO, DispatchQueue, or setting constraints yourself.
This solution is based on Gulz's answer.
1) Create a subclass of UITableView:
import UIKit
final class ContentSizedTableView: UITableView {
override var contentSize:CGSize {
didSet {
invalidateIntrinsicContentSize()...
How to override !important?
..... In my case I have to deal with templates that pull their CSS from a database somewhere. I grep the DB dump and it shows me it comes from a 1MB json blob. Not very useful to me in finding where to change it, forcing me to add CSS to a code file, the way it should be done, except with these nasty h...
random.seed(): What does it do?
...dom, because it runs on algorithms. Algorithms always give the same output based on the same input. This means, it depends on the value of the seed. So, in order to make it more random, time is automatically assigned to seed().
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Percentage width in a RelativeLayout
...f available space.
Subclass of RelativeLayout that supports percentage based dimensions
and margins. You can specify dimension or a margin of child by using
attributes with "Percent" suffix.
<android.support.percent.PercentRelativeLayout
xmlns:android="http://schemas.android.com/ap...
Highlight all occurrence of a selected word?
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Search based solutions (*, /...) move cursor, which may be unfortunate.
An alternative is to use enhanced mark.vim plugin, then complete your .vimrc to let double-click trigger highlighting (I don't know how a keyboard selection ma...
Update MongoDB field using value of another field
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For a database with high activity, you may run into issues where your updates affect actively changing records and for this reason I recommend using snapshot()
db.person.find().snapshot().forEach( function (hombre) {
hombre.name ...
Is there any connection string parser in C#?
...tringBuilder class.
The DbConnectionStringBuilder class
provides the base class from which the
strongly typed connection string
builders (SqlConnectionStringBuilder,
OleDbConnectionStringBuilder, and so
on) derive. The connection string
builders let developers
programmatically crea...
Does PostgreSQL support “accent insensitive” collations?
...ver, it's possible to specify an "accent insensitive" collation (for a database, table or column), which means that it's possible for a query like
...
What is the purpose of the “role” attribute in HTML?
...ike HTML-AAM. Some of the new HTML5 elements (dialog, main, etc.) are even based on the original ARIA roles.
http://www.w3.org/TR/wai-aria/
There are a few primary reasons to use roles in addition to your native semantic element.
Reason #1. Overriding the role where no host language element is appro...