What is/are the differences (in performance/usability/functionality) in using #pragma once and #if !defined MYHEADER_INCLUDED_ constructs? Or what is the difference between the two?
I'm new in C# and earlier I saw the lambda expression is like
(params) = { expression;}
but in LINQ, I saw examples like
IEnumerable customerFirstNames = customers.Select(cust = cust.FirstName);
No brackets.
Are they the same or is there any difference?
Thanks a lot.
Please advise me the difference between two ways of declaration of java constructor
public class A{
private static A instance = new A();
public static A getInstance() { return instance;
}
public static void main(String[] args) {
A a= A.getInstance();
}
}
AND
public class B{
public B(){};
public static void main(String[] args) {
B b= new B();
}
}
Thanks
GNU xargs has option '-x'. The man page says:
-x Exit if the size (see the -s option) is exceeded.
But xargs seems to not care if -x is set or not. I have been unable to make an example in which the -x has any effect at all.
Please provide two examples in which the only difference is an added -x and that produce different output.
I've always thought of the if not x is None version to be more clear, but Google's style guide implies (based on this excerpt) that they use if x is not None. Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?*
*I'm referring to any singleton, rather than just None.
...to compare singletons like
None. Use is or is not.
Hi,
I need to compare two files and redirect the different lines to third file. I know using diff command i can get the difference . But, is there any way of doing it in python ?
I have three date ranges in mysql table as follow
from 2013-09-29 to 2013-10-02
from 2013-10-14 to 2013-10-16
from 2013-10-28 to 2013-11-05
I want to count only days that occur in Month of October, for example from first range (2013-09-29 to 2013-10-02) I should get difference of two days (1st and 2nd October) , and it should ignore days from September month, Finally i want to count total days in a given month from above date ranges.
Can it be done from direct mysql query. or any short PHP logic.
When I open my SharePoint site collection everytime I am getting the pop up to enter the credential. How I can get rid off this. I checked in the alternate access mapping but I couldnt figure out anything difference,as the internal URL and external URL s are same. Can anyone help me regarding this??
Is it possible to use Enterprise Bean from JEE 5 server application in client application written in J2EE 1.4. What about difference in interfaces in this two technologies?
From what time I've spent with threads in Java, I've found these two ways to write threads.
public class ThreadA implements Runnable {
public void run() {
//Code
}
}
//with a "new Thread(threadA).start()" call
public class ThreadB extends Thread {
public ThreadB() {
super("ThreadB");
}
public void run() {
//Code
}
}
//with a "threadB.start()" call
Is there any significant difference in these two blocks of code?
Does the original data type of the username string in a call to FormsAuthentication.SetAuthCookie(...) make any difference with regards to security or code maintainability?
As I understand it, the cookie is encrypted and used to identify a user on each request. I'm curious whether it should affect the design of the primary key on my Users table in my database, eg. Guid vs int or a unique username string.
I tested my Xamarin.Forms app on iOS and Android and found this difference when I change the orientation of the mobile device:
On iOS, the app keeps the current page
On Android, the app seems to restart using the default page (or probably pop all pages except the first one).
Since I've never seen this behavior in another Android app, I'd like to disable it. Moreover, I don't think that this behavior is Android default.
Which property do I need to set the make the Android target behave as the iOS target?
In the Java Generic Book, while contrasting the difference between C++ Templates and Java Generic says:
In C++, a problem arises because
without the space denotes the
right-shift operator. Java fixes the
problem by a trick in the grammar.)
What is this trick?
I have to support IE6 and I calculate rendering time by creating a timestamp in javascript at the beginning of the page and doing the difference when document.ready is fired in jQuery.
If I do 3 pages load, the rendering times in milliseconds can look like this :
page 1 : 735, 2672, 734
page 2 : 3063, 1516, 3375
page 3 : 8281, 2531, 3703
Why is that? How can I have more consistency?
I just read this (one) study in which Tomcat under Linux outperformed Windows.
From your experience, is this generally true? Any deep reason that could explain the performance difference?
Hi, I'm using VSTO, C#, and Excel but VBA probably applies here as well.
What's the difference between calling the Merge(missing) method on a range and setting the MergeCells property to true? Does Merge() fail more often? Thanks!
After some searching in google and wikipedia, I still can not get a clear image about the "difference" between
BRMS (Business Rule Management System) and BPM (Business process management)/workflow system.
can those two concepts do the same thing from each other? (theoretically)
A "rule" can be modeled as a "process" as well. isn't it?
I was looking into Swiz framework and i felt the same of Spring. Just i felt the difference between these two is one is JAVA based and the other is Action Script based.
http://swizframework.org/
http://www.springsource.org/
My Question is:
Does the goal of the both framework is same?
Does the pattern they apply is same or different?
The concept of beans, dependency injection and IOC lies in both.
Why is ++i is l-value? and i++ not
Initially there were 2 questions one was removed since that was exact duplicate. So don't down vote the answers that were answering difference between pre- and post-increment.
What's the difference between local/html5 on this page:
http://code.google.com/p/jquery-jstore/wiki/DefaultEngines
I was under the impression that I could use localstorage on Chrome, but looks like that's not the case?
Some elucidation would be greatly appreciated.
Thanks.
I'm working with Twitter Bootstrap and the regular navbar you see in the guides: http://twitter.github.io/bootstrap/components.html#navbar
I don't want the navigation to stretch all the way left or right but stay where I can see both sides just like in the guide. The only difference is it would be fixed to the top.
I was wondering, how do I make this become a fixed navbar as if I was using the navbar-fixed-top class?
Or should I pony up for a usb 3.0 external hard drive? (my mobo will support it)
I intend to only use it for playing videos if that makes a difference.
I know close to nothing about hardware so let me know if you need more info.
I'm messing about with Canvas in Adobe Air. But their seems to be some issue with the mouse coordinates. The more I click towards the right, the difference between the draw position and actual click increases.
My code is
Wb.canvas.fillRect(evt.clientX-canvasTag.clientX, evt.clientY-canvasTag.clientY, 50, 50);