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What are C++ functors and their uses?
...function, to create functors from functions and methods, like this:
class Foo
{
public:
void operator () (int i) { printf("Foo %d", i); }
};
void Bar(int i) { printf("Bar %d", i); }
Foo foo;
boost::function<void (int)> f(foo);//wrap functor
f(1);//prints "Foo 1"
boost::function<void (i...
What is stdClass in PHP?
...eturns an StdClass instance.
<?php
//Example with StdClass
$json = '{ "foo": "bar", "number": 42 }';
$stdInstance = json_decode($json);
echo $stdInstance->foo . PHP_EOL; //"bar"
echo $stdInstance->number . PHP_EOL; //42
//Example with associative array
$array = json_decode($json, true);
ec...
Where and why do I have to put the “template” and “typename” keywords?
...ons).
Based on this notion, the language says that CurrentInstantiation::Foo, Foo and CurrentInstantiationTyped->Foo (such as A *a = this; a->Foo) are all member of the current instantiation if they are found to be members of a class that is the current instantiation or one of its non-depend...
Why do you not use C for your web apps?
...isn't a convenient language for manipulating strings.
Compare C#:
string foo = "foo";
string bar = "bar";
string foobar = foo + bar;
Corresponding C:
const char* foo = "foo";
const char* bar = "bar";
char* foobar = (char*)malloc(strlen(foo)+strlen(bar)+1);
strcpy(foobar, foo);
strcat(foobar, fo...
Similar to jQuery .closest() but traversing descendants?
...
If by "closest" descendant you mean the first child then you can do:
$('#foo').find(':first');
Or:
$('#foo').children().first();
Or, to look for the first occurrence of a specific element, you could do:
$('#foo').find('.whatever').first();
Or:
$('#foo').find('.whatever:first');
Really t...
Loading a properties file from Java package
... prop = new Properties();
InputStream in = getClass().getResourceAsStream("foo.properties");
prop.load(in);
in.close();
(Add all the necessary exception handling).
If your class is not in that package, you need to aquire the InputStream slightly differently:
InputStream in =
getClass().getReso...
Can I change a private readonly field in C# using reflection?
...
You can:
typeof(Foo)
.GetField("bar",BindingFlags.Instance|BindingFlags.NonPublic)
.SetValue(foo,567);
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How to sort with a lambda?
...lt;iterator>
#include <iostream>
#include <sstream>
struct Foo
{
Foo() : _i(0) {};
int _i;
friend std::ostream& operator<<(std::ostream& os, const Foo& f)
{
os << f._i;
return os;
};
};
typedef std::vector<Foo> Vect...
Interface defining a constructor signature?
...or within an interface, you'd have trouble deriving classes:
public class Foo : IParameterlessConstructor
{
public Foo() // As per the interface
{
}
}
public class Bar : Foo
{
// Yikes! We now don't have a parameterless constructor...
public Bar(int x)
{
}
}
...
Dynamic Anonymous type in Razor causes RuntimeBinderException
...bout nested dynamic properties? they will continue to be dynamic... eg: `{ foo: "foo", nestedDynamic: { blah: "blah" } }
– sports
Feb 24 '15 at 18:21
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