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Unique fields that allow nulls in Django
...low nulls in it, meaning I want to allow more than one record if bar field is null , but if it is not null the values must be unique.
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How to search for a string in text files?
I want to check if a string is in a text file. If it is, do X. If it's not, do Y. However, this code always returns True for some reason. Can anyone see what is wrong?
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How to prevent ENTER keypress to submit a web form?
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[revision 2012, no inline handler, preserve textarea enter handling]
function checkEnter(e){
e = e || event;
var txtArea = /textarea/i.test((e.target || e.srcElement).tagName);
return txtArea || (e.keyCode || e.which || e.cha...
How to remove multiple deleted files in Git repository
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edited Oct 1 '12 at 5:18
pb2q
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Is it possible to implement dynamic getters/setters in JavaScript?
...rs for properties whose names one already knows, by doing something like this:
4 Answers
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Namespace and class with the same name?
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I don't recommend you to name a class like its namespace, see this article.
The Framework Design Guidelines say in section 3.4 “do not use the
same name for a namespace and a type in that namespace”. That is:
namespace MyContainers.List
{
public class List { … }
}
Why is th...
Getting the class name of an instance?
...at created an instance of an object in Python if the function I am doing this from is the base class of which the class of the instance has been derived?
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How do I concatenate two lists in Python?
How do I concatenate two lists in Python?
24 Answers
24
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How to pass a variable from Activity to Fragment, and pass it back?
...o a fragment , you setArguments when you create it, and you can retrieve this argument later on the method onCreate or onCreateView of your fragment.
On the newInstance function of your fragment you add the arguments you wanna send to it:
/**
* Create a new instance of DetailsFragment, initializ...
How to get first and last day of the week in JavaScript
... get current date
var first = curr.getDate() - curr.getDay(); // First day is the day of the month - the day of the week
var last = first + 6; // last day is the first day + 6
var firstday = new Date(curr.setDate(first)).toUTCString();
var lastday = new Date(curr.setDate(last)).toUTCString();
firs...