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What are the rules for calling the superclass constructor?
...er than "super()".
class SuperClass
{
public:
SuperClass(int foo)
{
// do something with foo
}
};
class SubClass : public SuperClass
{
public:
SubClass(int foo, int bar)
: SuperClass(foo) // Call the superclass constructor in the sub...
Elegant solution to duplicate, const and non-const, getters? [duplicate]
... object itself is non-const, and casting away the const is allowed.
class Foo
{
public:
const int& get() const
{
//non-trivial work
return foo;
}
int& get()
{
return const_cast<int&>(const_cast<const Foo*>(this)->get());
}
...
Convert nested Python dict to object?
...nch import bunchify
>>> d = {'a': 1, 'b': {'c': 2}, 'd': ["hi", {'foo': "bar"}]}
>>> x = bunchify(d)
>>> x.a
1
>>> x.b.c
2
>>> x.d[1].foo
'bar'
A Python 3 library is available at https://github.com/Infinidat/munch - Credit goes to codyzu
...
- how to allow only one item selected?
...rmal select:
<select name="mySelect" size="3">
<option>Foo</option>
<option>Bar</option>
<option>Foo Bar</option>
<option>Bar Foo</option>
</select>
Fiddle
...
When should you use a class vs a struct in C++?
... classes are absolutely equivalent in every way except their name:
struct Foo
{
int x;
};
class Bar
{
public:
int x;
};
You can even switch keywords when redeclaring:
class Foo;
struct Bar;
(although this breaks Visual Studio builds due to non-conformance, so that compiler will emit a w...
Fork and synchronize Google Code Subversion repository into GitHub
...lone the Subversion repository and push to the Git:
git svn clone https://foo.googlecode.com/svn/ git-foo
cd git-foo
git remote add git-foo git@github.com:username/foo.git
git push git-foo master
After committing in the Subversion repository, run
cd /path/to/git-foo
git svn fetch
git svn reba...
Remove excess whitespace from within a string
...ce of multiple whitespaces " "* with a single whitespace " ".
Example:
$foo = preg_replace('/\s+/', ' ', $foo);
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__getattr__ on a module
...ule via m = ModuleType("mod") and set m.__getattr__ = lambda attr: return "foo"; however, when I run from mod import foo, I get TypeError: 'module' object is not iterable.
– weberc2
Jan 14 at 22:49
...
General suggestions for debugging in R
...
to see the call stack. Here is an example.
> options(warn = 2)
> foo <- function(x) bar(x + 2)
> bar <- function(y) warning("don't want to use 'y'!")
> foo(1)
Error in bar(x + 2) : (converted from warning) don't want to use 'y'!
> traceback()
7: doWithOneRestart(return(expr)...
What exactly is a reentrant function?
...:
#include <mutex>
typedef void (*callback)();
std::mutex m;
void foo(callback f)
{
m.lock();
// use the resource protected by the mutex
if (f) {
f();
}
// use the resource protected by the mutex
m.unlock();
}
Another function could well need to lock the ...