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load scripts asynchronously
... cross-browser for loading scripts asynchronously
function loadScript(src, callback)
{
var s,
r,
t;
r = false;
s = document.createElement('script');
s.type = 'text/javascript';
s.src = src;
s.onload = s.onreadystatechange = function() {
//console.log( this.readyState ); /...
How to implement has_many :through relationships with Mongoid and mongodb?
Using this modified example from the Rails guides , how does one model a relational "has_many :through" association using mongoid?
...
facebook: permanent Page Access Token?
...
Following the instructions laid out in Facebook's extending page tokens documentation I was able to get a page access token that does not expire.
I suggest using the Graph API Explorer for all of these steps except where otherwise stated.
0. Create Fac...
How do SO_REUSEADDR and SO_REUSEPORT differ?
...BSD socket implementation is the mother of all socket implementations. Basically all other systems copied the BSD socket implementation at some point in time (or at least its interfaces) and then started evolving it on their own. Of course the BSD socket implementation was evolved as well at the sam...
Can a foreign key be NULL and/or duplicate?
.... So your proposal table would have two foreign keys, one with the client ID and one with the sales rep ID. However, at the time the record is created, a sales rep is not always assigned (because no one is free to work on it yet), so the client ID is filled in but the sales rep ID might be null. ...
Select random row from a sqlite table
...extend this solution to a join? When using SELECT a.foo FROM a JOIN b ON a.id = b.id WHERE b.bar = 2 ORDER BY RANDOM() LIMIT 1; I always get the same row.
– Helmut Grohne
Sep 19 '13 at 8:18
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When should iteritems() be used instead of items()?
... D(dict(a=1, b=2, c=3))
>>> [v for v in d]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: __iter__ returned non-iterator of type 'list'
The same is true for viewitems, which is available in Python 3.
Also, since items returns a copy of the...
Android read text raw resource file
...ered Apr 15 '11 at 11:22
VovodroidVovodroid
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When do I use fabs and when is it sufficient to use std::abs?
...
That's weird. Your call should've been ambiguous (and thus an error) right?
– Nick
Jan 12 '13 at 15:57
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SQL Server indexes - ascending or descending, what difference does it make?
...y Optimiser's point of view.
For the table definition
CREATE TABLE T1( [ID] [int] IDENTITY NOT NULL,
[Filler] [char](8000) NULL,
PRIMARY KEY CLUSTERED ([ID] ASC))
The Query
SELECT TOP 10 *
FROM T1
ORDER BY ID DESC
Uses an ordered scan with scan direction BAC...