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Is there YAML syntax for sharing part of a list or map?
...ick, as in the following (untested) example:
sitelist: &sites
? www.foo.com # "www.foo.com" is the key, the value is null
? www.bar.com
anotherlist:
<< : *sites # merge *sites into this mapping
? www.baz.com # add extra stuff
Some things to notice. Firstly, since << ...
Configuring so that pip install can work from github
...need the whole python package, with a setup.py file in it.
A package named foo would be:
foo # the installable package
├── foo
│ ├── __init__.py
│ └── bar.py
└── setup.py
And install from github like:
$ pip install git+ssh://git@github.com/myuser/foo.git
or
$ pip...
How can I use inverse or negative wildcards when pattern matching in a unix/linux shell?
... like this (replace ls with cp and add the target directory, of course)
~/foobar> shopt extglob
extglob off
~/foobar> ls
abar afoo bbar bfoo
~/foobar> ls !(b*)
-bash: !: event not found
~/foobar> shopt -s extglob # Enables extglob
~/foobar> ls !(b*)
abar afoo
~/foobar>...
Forward declaration of a typedef in C++
...int a;
int b;
} bah;
// b.h
struct _bah;
typedef _bah bah;
class foo {
foo(bah * b);
foo(bah b);
bah * mBah;
};
// b.cpp
#include "b.h"
#include "a.h"
foo::foo(bah * b) {
mBah = b;
}
foo::foo(bah b) {
mBah = &b;
}
...
When vectors are allocated, do they use memory on the heap or the stack?
... community wiki
2 revsFred Foo
3
...
Why should the “PIMPL” idiom be used? [duplicate]
...
Well, I wouldn't use it. I have a better alternative:
foo.h:
class Foo {
public:
virtual ~Foo() { }
virtual void someMethod() = 0;
// This "replaces" the constructor
static Foo *create();
}
foo.cpp:
namespace {
class FooImpl: virtual public Foo {
pu...
How to disable an input type=text?
...
document.getElementById('foo').disabled = true;
or
document.getElementById('foo').readOnly = true;
Note that readOnly should be in camelCase to work correctly in Firefox (magic).
Demo: https://jsfiddle.net/L96svw3c/ -- somewhat explains the dif...
How do you specify a byte literal in Java?
...it quacks like a duck, I call it a duck.
What you can't do is this:
void foo(byte a) {
...
}
foo( 0xa ); // will not compile
You have to cast as follows:
foo( (byte) 0xa );
But keep in mind that these will all compile, and they are using "byte literals":
void foo(byte a) {
...
}
...
What is a NullPointerException, and how do I fix it?
...example, doSomething() could be written as:
/**
* @param obj An optional foo for ____. May be null, in which case
* the result will be ____.
*/
public void doSomething(SomeObject obj) {
if(obj == null) {
//do something
} else {
//do something else
}
}
Finally, How ...
What's the point of const pointers?
...u're doing things you didn't mean to do. Imagine the following typo:
void foo(int* ptr)
{
ptr = 0;// oops, I meant *ptr = 0
}
If you use int* const, this would generate a compiler error because you're changing the value to ptr. Adding restrictions via syntax is a good thing in general. Just d...