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What are OLTP and OLAP. What is the difference between them?
...the analytics/business intelligence domain, and therefore OLAP is probably more suited.
If you think in terms of "It would be nice to know how/what/how much"..., and that involves all "objects" of one or more kind (ex. all the users and most of the products to know the total spent) then OLAP is pro...
Exception 'open failed: EACCES (Permission denied)' on Android
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Is there a simple, elegant way to define singletons? [duplicate]
...itance as part of your design, in which case most of the answers below are more suitable
– Jim Jeffries
Jun 6 '11 at 8:23
11
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Entity Attribute Value Database vs. strict Relational Model Ecommerce
...ponents
Con: complex code required to validate simple data types
Con: much more complex SQL for simple
reports
Con: complex reports can become almost
impossible
Con: poor performance for large data sets
Option 2, Modelling each entity separately:
Con: more time required to gather
requirements an...
How do I rename all folders and files to lowercase on Linux?
...o move files into non-existing directories (e.g. "A/A" into "a/a").
Or, a more verbose version without using "rename".
for SRC in `find my_root_dir -depth`
do
DST=`dirname "${SRC}"`/`basename "${SRC}" | tr '[A-Z]' '[a-z]'`
if [ "${SRC}" != "${DST}" ]
then
[ ! -e "${DST}" ] &...
How to send a GET request from PHP?
...
Unless you need more than just the contents of the file, you could use file_get_contents.
$xml = file_get_contents("http://www.example.com/file.xml");
For anything more complex, I'd use cURL.
...
Determine if a String is an Integer in Java [duplicate]
...tch just about every error condition you can think of. It will be a little more expensive (you have to create a Scanner object, which in a critically-tight loop you don't want to do. But it generally shouldn't be too much more expensive, so for day-to-day operations it should be pretty reliable.
pu...
UTF-8, UTF-16, and UTF-32
...nce it uses 2 bytes per character, primarily. UTF-8 will start to use 3 or more bytes for the higher order characters where UTF-16 remains at just 2 bytes for most characters.
UTF-32 will cover all possible characters in 4 bytes. This makes it pretty bloated. I can't think of any advantage to using...
How should I choose an authentication library for CodeIgniter? [closed]
..., Redux, SimpleLogin, SimpleLoginSecure, pc_user, Fresh Powered, and a few more. None of them were up to par, IMO, either they were lacking basic features, inherently INsecure, or too bloated for my taste.
Actually, I did a detailed roundup of all the authentication libraries for CodeIgniter when I ...
Pythonic way to create a long multi-line string
...""" this is a very
long string if I had the
energy to type more and more ..."""
You can use single quotes too (3 of them of course at start and end) and treat the resulting string s just like any other string.
NOTE: Just as with any string, anything between the starting and ending...