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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...of different "types" in the same collection, so why not just put your two "tables" in the same collection. They would share the same _id space, and thus, would be guaranteed unique. Switching from "prospective" to "registered" would be a simple flipping of a field...
...
How does the compilation/linking process work?
...ct files produced by the compiler and produces either a library or an executable file.
Preprocessing
The preprocessor handles the preprocessor directives, like #include and #define. It is agnostic of the syntax of C++, which is why it must be used with care.
It works on one C++ source file at a ...
Maintain the aspect ratio of a div with CSS
...></div>
For other aspect ratios, you can use the following table to calculate the value for height according to the width of the element :
aspect ratio | multiply width by
-----------------------------------
1:1 | 1
1:3 | 3
4:3 | ...
How to read contacts on Android 2.0
...e amount of data that is returned.
String key, value, phoneNumber;
Hashtable contactPhoneInfo = new Hashtable<String, String>();
Uri phoneUri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String [] PHONES_PROJECTION = new String[] { ContactsContract.CommonDataKinds.Phone.NUMBER ...
Code Golf: Lasers
...&redo}die/x/?true:false,$/
The first line loads the input into %t, a table of the board where $t{99*i+j} holds the character at row i,column j. Then,
%d=split//,'>.^1<2v3' ; ($r)=grep{$d|=$d{$t{$_}}}%t
it searches the elements of %t for a character that matches > ^ < or v, and s...
What is the difference between a port and a socket?
..., W. Richard Stevens)
In most C-derived languages, TCP connections are established and manipulated using methods on an instance of a Socket class. Although it is common to operate on a higher level of abstraction, typically an instance of a NetworkStream class, this generally exposes a reference t...
How do I tell Maven to use the latest version of a dependency?
...e some uncertainties between versions/releases/snapshots in this very nice table here: goo.gl/iDq6PK
– Ev0oD
Oct 13 '14 at 13:13
1
...
Is std::vector so much slower than plain arrays?
...ver the buffer.
(The two overloads where added to handle movable, constructable and non-copyable types -- the performance improvement when working on uninitialized data is a bonus).
The push_back solution also does fencepost checking, which slows it down, so it remains slower than the malloc versi...
Merging: Hg/Git vs. SVN
...OT BETTER at merging than SVN. This is obviously anecdotal, but there is a table to follow.
Here are some of the things we found:
SVN used to throw up a lot of tree conflicts in situations where it seemed like it shouldn't. We never got to the bottom of this but it doesn't happen in GIT.
While be...
What is the significance of ProjectTypeGuids tag in the visual studio project file
...(for C# and VB.NET projects) and others have other purposes. The following table lists known project type Guids.
Project Type Description Project Type Guid
Windows (C#) {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
Windows (VB.NET) {F184...