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What's the difference between RANK() and DENSE_RANK() functions in oracle?
...s.
As for nulls, it depends on the ORDER BY clause. Here is a simple test script you can play with to see what happens:
with q as (
select 10 deptno, 'rrr' empname, 10000.00 sal from dual union all
select 11, 'nnn', 20000.00 from dual union all
select 11, 'mmm', 5000.00 from dual union all
select ...
#pragma once vs include guards? [duplicate]
...or something like that--). Not taking into account speed, you could have a script that substituted any, say, %INCLUDE_GUARD% in a file for an automatically-managed guard symbol; you would write headers as header.hpp.in, and, because you would already have the preprocessor conditional pair, the final...
How to check status of PostgreSQL server Mac OS X
...p; if you want to check and start postgres in one go (handy for automation scripts).
– Kate
Sep 30 '15 at 15:13
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Changes in import statement python3
...mport happens whenever you are importing a package relative to the current script/package.
Consider the following tree for example:
mypkg
├── base.py
└── derived.py
Now, your derived.py requires something from base.py. In Python 2, you could do it like this (in derived.py):
from bas...
When to use static vs instantiated classes
...
}
The only situation where I'd use (and I've used them to mimic the JavaScript prototype object in PHP 5.3) static members is when I know that the respective field will have the same value cross-instance. At that point you can use a static property and maybe a pair of static getter/setter methods...
Why does sudo change the PATH?
...is is/is not compiled in.
It is by default in Gentoo
# ( From the build Script )
....
ROOTPATH=$(cleanpath /bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/bin${ROOTPATH:+:${ROOTPATH}})
....
econf --with-secure-path="${ROOTPATH}"
...
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...ange, they will change in the copied list too and vice versa.
(Here's the script if anyone's interested or wants to raise any issues:)
from copy import deepcopy
class old_class:
def __init__(self):
self.blah = 'blah'
class new_class(object):
def __init__(self):
self.blah ...
How to identify unused css definitions
...o check it didn't strip id's and classes with no style but are used as JavaScript selectors.
The below content is taken from http://unused-css.com/ so credit to them for recommending other solutions:
Latish Sehgal has written a windows application to find and remove unused CSS classes. I haven't te...
If REST applications are supposed to be stateless, how do you manage sessions?
... would need to retrieve the data: authentication and the URI.
Transaction scripts
As noted above, the client-side application itself calls the REST services along with the authentication that it manages on the client side as well.
What this means for REST services [if done correctly] is to take a...
What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
...f the distributed SCMs. Also, if you currently make heavy use of precommit script automation with SVN (ie. requiring unit tests to pass before a commit can proceed), you'll probably want to use a tool similar to PQM for automating merge requests to your shared branches.
SVK is a DSCM which uses Sub...