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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...the mongo shell:
MongoDB shell version: 1.6.5
connecting to: test
> db.foo.insert({_id: 'abc'})
> db.bar.insert({_id: 'abc'})
> db.foo.find({_id: 'abc'})
{ "_id" : "abc" }
> db.bar.find({_id: 'abc'})
{ "_id" : "abc" }
> db.foo.insert({_id: 'abc', data:'xyz'})
E11000 duplicate key err...
C# - Selectively suppress custom Obsolete warnings
...le:
using System;
class Test
{
[Obsolete("Message")]
static void Foo(string x)
{
}
static void Main(string[] args)
{
#pragma warning disable 0618
// This one is okay
Foo("Good");
#pragma warning restore 0618
// This call is bad
Foo("Bad");
...
When should you not use virtual destructors?
...lized somewhere.
struct A {
// virtual ~A ();
int i;
int j;
};
void foo () {
A a = { 0, 1 }; // Will fail if virtual dtor declared
}
In an extreme case, such a change can also cause undefined behaviour where the class is being used in a way that requires a POD, e.g. passing it via an el...
Compare if two variables reference the same object in python
...check which unique object each variable name refers to.
In [1]: x1, x2 = 'foo', 'foo'
In [2]: x1 == x2
Out[2]: True
In [3]: id(x1), id(x2)
Out[3]: (4509849040, 4509849040)
In [4]: x2 = 'foobar'[0:3]
In [5]: x2
Out[5]: 'foo'
In [6]: x1 == x2
Out[6]: True
In [7]: x1 is x2
Out[7]: False
In [8]:...
Add .gitignore to gitignore
...temp/.git/
mhaase@ubuntu:~$ cd temp
mhaase@ubuntu:~/temp$ touch .gitignore foo bar baz bat
mhaase@ubuntu:~/temp$ git status
# On branch master
#
# Initial commit
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# .gitignore
# bar
# bat...
How to navigate to a directory in C:\ with Cygwin?
...led /c (in the home directory)
Then you can do this in your shell
cd /c/Foo
cd /c/
Very handy.
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Custom attributes - Yea or nay?
...gt;
<!-- {
someRandomData: {a:1,b:2},
someString: "Foo"
} -->
<div>... other regular content...</div>
</div>
The comment-object ties to the parent element (i.e. #someelement).
Here's the parser: http://pastie.org/511358
To get the data for an...
Convert form data to JavaScript object with jQuery
...
@TobiasCohen It doesn't handle foo[bar]-type inputs as expected, not to mention most of the other input name varieties. After being very frustrated with shallow solutions to this problem, I ended up writing my own jQuery plugin -- details in the answer I ...
Can't operator == be applied to generic types in C#?
...== defined. The same will happen for this which is more obvious:
void CallFoo<T>(T x) { x.foo(); }
That fails too, because you could pass a type T that wouldn't have a function foo. C# forces you to make sure all possible types always have a function foo. That's done by the where clause.
...
How to remove all white space from the beginning or end of a string?
...
use the String.Trim() function.
string foo = " hello ";
string bar = foo.Trim();
Console.WriteLine(bar); // writes "hello"
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