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Difference between CouchDB and Couchbase
...One (formerly CouchIO) merged with Membase (formerly NorthScale) to form a new company called Couchbase. Membase (the company) developed Membase (a product of the same name). Membase was created by several leaders of the Memcached project and it used the Memcached protocol. After the merger of Couch...
SQL Server 2008: How to query all databases sizes?
...
with fs
as
(
select database_id, type, size * 8.0 / 1024 size
from sys.master_files
)
select
name,
(select sum(size) from fs where type = 0 and fs.database_id = db.database_id) DataFileSizeMB,
(select sum(size) from fs where type = 1 and...
Can an html element have multiple ids?
I understand that an id must be unique within an HTML/XHTML page.
18 Answers
18
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Convert a list of data frames into one data frame
...as probably true for May 2010 and some time after, but in about Sep 2011 a new function rbindlist was introduced in the data.table package version 1.8.2, with a remark that "This does the same as do.call("rbind",l), but much faster". How much faster?
library(rbenchmark)
benchmark(
do.call = do.c...
Is there a quicker / better way to clear the iPhone Simulator cache than deleting its directory?
So I'm still reasonably new to iOS development and I'm finding myself quite regularly needing to delete either DerivedData, or the contents of the iPhone Simulator directory, to get things to actually execute from my code. Clean in Xcode doesn't do the same as emptying those directories, right? And ...
LAST_INSERT_ID() MySQL
...estion that I think must be quite easy. I need to return the LAST INSERTED ID from table1 when I run the following MySql query:
...
How does origin/HEAD get set?
...d which branch
"HEAD" points at, and the receiving end needed to guess. A new
capability has been defined in the pack protocol to convey this
information so that cloning from a repository with more than one
branches pointing at the same commit where the HEAD is at now
reliably sets the initial bran...
Unit testing with Spring Security
...ed-proxy tag, the static method getUserDetails will be called every time a new HTTP request comes in and any references to the currentUser property will be resolved correctly. Now unit testing becomes trivial:
protected void setUp() {
// existing init code
MyUserDetails user = new MyUserDe...
Build tree array from flat array in javascript
...ierarchical, in order to later build a tree.
Every entry of the json has :
id : a unique id,
parentId : the id of the parent node (which is 0 if the node is a root of the tree)
level : the level of depth in the tree
...
Send attachments with PHP Mail()?
...HPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
$email = new PHPMailer();
$email->SetFrom('you@example.com', 'Your Name'); //Name is optional
$email->Subject = 'Message Subject';
$email->Body = $bodytext;
$email->AddAddress( 'destinationaddress@example.com' );
$...