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Django ManyToMany filter()
...d it.
the above code will end up generating SQL that looks something like:
SELECT * FROM users WHERE id IN (SELECT user_id FROM userzones WHERE zone_id IN (1,2,3))
which is nice because it doesn't have any intermediate joins that could cause duplicate users to be returned
...
How to write a Unit Test?
...l,calculatedVal).
Test your method by running it (in Eclipse, right click, select Run as → JUnit test).
//for normal addition
@Test
public void testAdd1Plus1()
{
int x = 1 ; int y = 1;
assertEquals(2, myClass.add(x,y));
}
Add other cases as desired.
Test that your binary sum doe...
Why is it a bad practice to return generated HTML instead of JSON? Or is it?
...l the response data at once. For example, I have a series of three chained selects, where the selected value of one determines which values are going to be used for populating the second, and so on.
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Debugging iframes with Chrome developer tools
...ools in Chrome, there is a bar along the top, called the Execution Context Selector (h/t felipe-sabino), just under the Elements, Network, Sources... tabs, that changes depending on the context of the current tab. When in the Console tab there is a dropdown in that bar that allows you to select the...
How do I get a TextBox to only accept numeric input in WPF?
... LengthOfModifiedText(string newText, bool paste)
{
var countOfSelectedChars = this.AssociatedObject.SelectedText.Length;
var caretIndex = this.AssociatedObject.CaretIndex;
string text = this.AssociatedObject.Text;
if (countOfSelectedChars > 0 || paste)
...
Best way to store time (hh:mm) in a database
...t a glance and performing calculations on them are straightforward.
E.g.
SELECT DATEDIFF(MINUTE, event_start, event_end)
ISO8601 date standard
If using SQLite then you don't have this, so instead use a Text field and store it in ISO8601 format eg.
"2013-01-27T12:30:00+0000"
Notes:
This use...
When should you use 'friend' in C++?
...te, the C++ FAQ mentions that friend enhances encapsulation. friend grants selective access to members, just like protected does. Any fine-grained control is better than granting public access. Other languages define selective access mechanisms too, consider C#'s internal. Most negative criticism ar...
What is The difference between ListBox and ListView
...ew, but you can easily create your own.
Another difference is the default selection mode: it's Single for a ListBox, but Extended for a ListView
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What is the difference between jQuery's mouseout() and mouseleave()?
...
Event Mouseout will trigger when mouse leaves the selected element and also when mouse leaves it's child elements also.
Event Mouseleave element will trigger when pointer will leave the selected element only.
Reference: W3School
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How to reset (clear) form through JavaScript?
...) {
elements[i].checked = false;
}
break;
case "select-one":
case "select-multi":
elements[i].selectedIndex = -1;
break;
default:
break;
}
}
}
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