大约有 47,000 项符合查询结果（耗时：0.0521秒） [XML]
How to enable C++11 in Qt Creator?
...elete your duplicate/incomplete answer, all I could do was to downvote it. Now that you have edited it to make it more presentable, I am happy with just the downvote.
– nurettin
Aug 21 '14 at 12:55
...
Why is the default value of the string type null instead of an empty string?
...ublic static string EmptyNull(this string str)
{
return str ?? "";
}
Now this works safely:
string str = null;
string upper = str.EmptyNull().ToUpper();
share
|
improve this answer
...
How to set web.config file to show full error message
I deployed my MVC-3 application on windows Azure. But now when I am requesting it through staging url it shows me (Sorry, an error occurred while processing your request.) . Now I want to see the full error message, by default it is hiding that because of some security reasons. I know that we can...
What is the difference between 'typedef' and 'using' in C++11?
I know that in C++11 we can now use using to write type alias, like typedef s:
7 Answers
...
What's the best practice to round a float to 2 decimals? [duplicate]
...that allows you to round a number to the number of decimals that you want. Now you need two, but maybe you would like to try with 3 to compare results, and this function gives you this freedom.
/**
* Round to certain number of decimals
*
* @param d
* @param decimalPlace
* @return
*/
public stati...
Predicate Delegates in C#
...ic bool greaterThanTwo(int arg)
{
return arg > 2;
}
}
Now if you are using C# 3 you can use a lambda to represent the predicate in a cleaner fashion:
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
List<int> list = new...
Difference between String replace() and replaceAll()
...erloaded to accept both a primitive char and a CharSequence as arguments.
Now as far as the performance is concerned, the replace() method is a bit faster than replaceAll() because the latter first compiles the regex pattern and then matches before finally replacing whereas the former simply matche...
What exactly does git's “rebase --preserve-merges” do (and why?)
...we'll take its (their) descendants and replay them on top of new parents
Now we can define C, the set of commits to replay. In particular, it's those commits:
1) reachable from B but not A (as in a normal rebase), and ALSO
2) descendants of the merge base(s)
If we ignore cherry-picks and...
How to use shared memory with Linux in C
...
Haha I know what you mean, but it's actually because we're not used to reading manpages. When I learned to read them and got used to them, they became even more useful than lousy tutorials with particular demonstrations. I remember I...
Container View Controller Examples [closed]
...
do you have the sample code now, i need it because i have tried a lot but no solute yet.
– iPhone Programmatically
Dec 14 '12 at 10:33
...