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What is the difference between string primitives and String objects in JavaScript?
...ain type categories, primivites and objects.
var s = 'test';
var ss = new String('test');
The single quote/double quote patterns are identical in terms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actually happens is that a primitive is convert...
Why is the default value of the string type null instead of an empty string?
It's quite annoying to test all my strings for null before I can safely apply methods like ToUpper() , StartWith() etc...
...
Pass a data.frame column name to a function
...
Is there any way to pass the column name not as a string?
– kmm
Apr 14 '10 at 23:13
...
How do you query for “is not null” in Mongo?
...roposition:
db.collection_name.find({"field_name":{$type:2}}) //type:2 == String
You can check on the required attribute's type, it will return all the documents that its field_name queried contains a value because you are checking on the filed's type else if it is null the type condition doesn't...
Convert list to array in Java [duplicate]
...llection to an array: either using
a pre-sized array (like c.toArray(new String[c.size()])) or
using an empty array (like c.toArray(new String[0]). In
older Java versions using pre-sized array was recommended, as the
reflection call which is necessary to create an array of proper size
...
Local Storage vs Cookies
...a
Expiration dates
Cons
Each domain stores all its cookies in a single string, which can make
parsing data difficult
Data is unencrypted, which becomes an issue because... ... though
small in size, cookies are sent with every HTTP request Limited size
(4KB)
SQL injection can be performed from a ...
PowerShell script to return versions of .NET Framework on a machine?
...le by looking for unique lines that start with ".NET Framework"
Select-String "^.NET" | Select-Object -Unique |
# And flip it so it's key = value
# And convert ".NET FRAMEWORK 4.5.2" to [version]4.5.2
ForEach-Object {
[version]$v, [int]$k = $_ -replace "\.NET Framework " -s...
Can a class member function template be virtual?
...using MinGW G++ 3.4.5 on Window 7:
#include <iostream>
#include <string>
using namespace std;
template <typename T>
class A{
public:
virtual void func1(const T& p)
{
cout<<"A:"<<p<<endl;
}
};
template <typename T>
class B
: public...
Difference between 'struct' and 'typedef struct' in C++?
...hat C++
generates a typedef for every tag
name, such as
typedef class string string;
Unfortunately, this is not entirely
accurate. I wish it were that simple,
but it's not. C++ can't generate such
typedefs for structs, unions, or enums
without introducing incompatibilities
with ...
How do I work around JavaScript's parseInt octal behavior?
...
@Grodriguez, and when 0 in |0 is a string?
– Oleg V. Volkov
Oct 24 '14 at 16:29
...