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Why use @PostConstruct?
...ed on all classes that
support dependency injection.
JSR-250 Chap. 2.5 javax.annotation.PostConstruct
The @PostConstruct annotation allows for the definition of methods to be executed after the instance has been instantiated and all injects have been performed.
public class Car {
@Injec...
NTFS performance and large volumes of files and directories
...mbers above 250 cost a Factor of 2
Directories above 120 cost a Factor of 2.5
The File-Explorer in Windows 7 can handle large #Files or #Dirs, but Usability is still bad.
Introducing Sub-Directories is not expensive
This is the Data (2 Measurements for each File and Directory):
(FOPS = File Ope...
Forward declaring an enum in C++
...hosen - it could be a char or an int, or something else.
From Section 7.2.5 of the ISO C++ Standard:
The underlying type of an enumeration is an integral type that can represent all the enumerator values defined in the enumeration. It is implementation-defined which integral type is used as t...
How to write header row with csv.DictWriter?
...header and data to a file.
Note: with statement was added in 2.6. If using 2.5: from __future__ import with_statement
with open(infile,'rb') as fin:
dr = csv.DictReader(fin, delimiter='\t')
# dr.fieldnames contains values from first row of `f`.
with open(outfile,'wb') as fou:
dw = csv.Dict...
What is the recommended batch size for SqlBulkCopy?
...ption. I started with 500 and experimented with larger. I found 5000 to be 2.5x faster, on average, than 500. Inserting the 6 million rows takes about 30 seconds with a batch size of 5,000 and about 80 seconds with batch size of 500.
10,000 was not measurably faster. Moving up to 50,000 improved t...
git ahead/behind info between master and branch?
...
With Git 2.5+, you now have another option to see ahead/behind for all branches which are configured to push to a branch.
git for-each-ref --format="%(push:track)" refs/heads
See more at "Viewing Unpushed Git Commits"
...
How to convert an xml string to a dictionary?
...
Thx for this code! Additional info: if you use python 2.5 you can't use dictionary comprehension, so you have to change the line d = {t.tag: {k:v[0] if len(v) == 1 else v for k, v in dd.iteritems()}} to d = { t.tag: dict( (k, v[0] if len(v) == 1 else v) for k, v in dd.iterit...
Postgres and Indexes on Foreign Keys and Primary Keys
... this is explained in the article Cool performance features of EclipseLink 2.5
Indexing Foreign Keys
The first feature is auto indexing of foreign keys. Most people incorrectly assume that databases index
foreign keys by default. Well, they don't. Primary keys are auto
indexed, but fore...
Remove .php extension with .htaccess
...
Thanks! This edit is where its at, apache 2.4, apache 2.5 end up in the infinite loop (and will 500) [END] super important
– Jake Bolam
Aug 4 '16 at 7:34
...
Choosing Java vs Python on Google App Engine
...ey are running Java 6 as well as legacy Jetty 6 container with Servlet API 2.5), all in all Java Support in GAE is still stuck in 2010. While I love GAE simplicity and Google Powerful Services, I can't recommend GAE for Java until they upgrade its stack.
– Anthony Accioly
...