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differentiate null=True, blank=True in django
When we add a database field in django we generally write:
18 Answers
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ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides
...''' <remarks></remarks>
Public Sub New()
MyBase.New()
End Sub
''' <summary>
''' Initializes a new instance of the System.Collections.ObjectModel.ObservableCollection(Of T) class that contains elements copied from the specified collection....
Overriding a Rails default_scope
If I have an ActiveRecord::Base model with a default-scope:
9 Answers
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What is the difference between JSF, Servlet and JSP?
...t, such as doGet() and doPost().
JSF (JavaServer Faces)
JSF is a component based MVC framework which is built on top of the Servlet API and provides components via taglibs which can be used in JSP or any other Java based view technology such as Facelets. Facelets is much more suited to JSF than JSP....
Difference Between ViewResult() and ActionResult()
...s an HTTP redirection to a URL that is determined by the
routing engine, based on given route data
JsonResult - Serializes a given ViewData object to JSON format
JavaScriptResult - Returns a piece of JavaScript code that can be executed on the client
ContentResult - Writes content to the response ...
How to customize a requirements.txt for multiple environments?
... @SohamNavadiya That is not what I asked. Let's say I have a base.txt with 3 packages in it, and dev.txt with 1 package in it (and -r base.txt). ALL 4 packages are installed in my virtual environment. I want to now install the 5th package and list it in base, NOT in dev, how do I do it...
How to sum array of numbers in Ruby?
...t(0){|sum,x| sum + x }
See Ruby's Enumerable Documentation
(note: the 0 base case is needed so that 0 will be returned on an empty array instead of nil)
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Get css top value as number not as string?
...adix too: parseInt($('#elem').css('top'), 10); Forces it to be parsed as base 10, otherwise strings beginning with '0' will be parsed in base 8.
– Ben
Dec 27 '08 at 17:39
3
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Why is January month 0 in Java Calendar?
...lendar and find something better.
One point which is in favour of using 0-based indexes is that it makes things like "arrays of names" easier:
// I "know" there are 12 months
String[] monthNames = new String[12]; // and populate...
String name = monthNames[calendar.get(Calendar.MONTH)];
Of cours...
How do I get currency exchange rates via an API such as Google Finance? [closed]
...Exchange Rates API
Free for personal use (1000 hits per month)
Changing "base" (from "USD") is not allowed in Free account
Requires registration.
Request: http://openexchangerates.org/latest.json
Response:
<!-- language: lang-js -->
{
"disclaimer": "This data is collected from ...