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What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
...'s not the only ternary operator, just the most common one.
Here's a good em>x m>ample from Wikipedia demonstrating how it works:
A traditional if-else construct in C, Java and JavaScript is written:
if (a > b) {
result = m>x m>;
} else {
result = y;
}
This can be rewritten as the following state...
Select by partial string from a pandas DataFrame
...
Since str.* methods treat the input pattern as a regular em>x m>pression, you can use df[df['A'].str.contains("Hello|Britain")]
– Garrett
Jun 27 '13 at 19:20
7
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How to Sort a List by a property in the object
...e Sort method, passing a Comparison<T> delegate:
objListOrder.Sort((m>x m>, y) => m>x m>.OrderDate.CompareTo(y.OrderDate));
If you prefer to create a new, sorted sequence rather than sort in-place then you can use LINQ's OrderBy method, as mentioned in the other answers.
...
Why doesn't this code simply print letters A to Z?
...ealing with arithmetic operations on character variables and not C's.
For em>x m>ample, in Perl 'Z'+1 turns into 'AA', while in C 'Z'+1 turns into '[' ( ord('Z') == 90, ord('[') == 91 ).
Note that character variables can be incremented but not decremented and even so only plain ASCII characters (a-z and ...
Deep null checking, is there a better way?
...of the language.
Update (2014):
The ?. operator is now planned for the nem>x m>t Roslyn compiler release. Note that there is still some debate over the em>x m>act syntactic and semantic analysis of the operator.
Update (July 2015): Visual Studio 2015 has been released and ships with a C# compiler that supp...
Are members of a C++ struct initialized to 0 by default?
...arent p = {}; // value initializes all members
The second will make p.s.{m>x m>,y} zero. You cannot use these aggregate initializer lists if you've got constructors in your struct. If that is the case, you will have to add proper initalization to those constructors
struct Snapshot {
int m>x m>;
dou...
How to use Boost in Visual Studio 2010
What is a good step by step em>x m>planation on how to use the Boost library in an empty project in Visual Studio?
13 Answers
...
How to declare variable and use it in the same Oracle SQL script?
... a bind variable. The mechanism for assigning values to a VAR is with an Em>X m>EC call:
SQL> var name varchar2(20)
SQL> em>x m>ec :name := 'SALES'
PL/SQL procedure successfully completed.
SQL> select * from dept
2 where dname = :name
3 /
DEPTNO DNAME LOC
---------- ----------...
$PHP_AUTOCONF errors on mac os m>x m> 10.7.3 when trying to install pecl em>x m>tensions
...tp and memcache and in both cases, I get similar errors. This is on MAC OS m>X m> 10.7.3 (lion) and I also have m>X m>CODE installed on it. I also installed Zend Server community edition before running these commands and have CFLAGS='-arch i386 -arch m>x m>86_64' environment variables set. So please help with what...
How to remove item from list in C#?
...
List<T> has two methods you can use.
RemoveAt(int indem>x m>) can be used if you know the indem>x m> of the item. For em>x m>ample:
resultlist.RemoveAt(1);
Or you can use Remove(T item):
var itemToRemove = resultlist.Single(r => r.Id == 2);
resultList.Remove(itemToRemove);
When you ar...