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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...is when UUIDs are produced on separate machines, for example when multiple online transactions are process on several machines for scaling purposes.
In such a situation, the risks of having collisions due to poor choices in the way the pseudo-random number generators are initialized, for example, a...
Is ASCII code 7-bit or 8-bit?
...-codes.pdf) and then chase its references (many of which are not available online and may be hard to find even with access to a university library, I regret to say).
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Batch script: how to check for admin rights
...nconsistent state. The dirty bit can be set because:
The volume is online and it has outstanding changes.
Changes were made to the volume and the computer was shut down before the changes were committed to the disk.
Corruption was detected on the volume.
If the dirty bit is set w...
Combining CSS Pseudo-elements, “:after” the “:last-child”
...r.) We've come a long way, and if you intend for your site to present its online identity long-term - without it becoming a short-sighted solution - then simply consider the revenue that you would earn from someone using IE8. Nada. Even senior citizens, 20-years behind the times, are using tablets...
Is it possible to declare two variables of different types in a for loop?
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This does not compile on VS 2008, but does on Comeau online ;-)
– JRL
Apr 22 '10 at 0:22
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How do I read any request header in PHP
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@EvandelaCruz: leserged.online.fr/phpinfo.php I see it here: _SERVER["HTTP_CACHE_CONTROL"] max-age=0
– Quassnoi
Mar 23 '16 at 17:46
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Send email using java
...ers you can install locally on your own pc, or you can use one of the many online servers. One of the more known servers is Google's:
I just successfully tested the allowed Google SMTP configurations using the first example from Simple Java Mail:
final Email email = EmailBuilder.startingBlank(...
Has anyone actually implemented a Fibonacci-Heap efficiently?
...ndsor. Unfortunately, most of the versions of that file that I could find online (and the one in Ubuntu's libboost-dev package) still had the bugs; I had to pull a clean version from the Subversion repository.
Since version 1.49 Boost C++ libraries added a lot of new heaps structs including fibon...
Choice between vector::resize() and vector::reserve()
...ts 0
cout <<(v2.capacity()==1000)<< endl; //prints 1
Output (online demo):
1
1
0
1
So resize() may not be desirable, if you don't want the default-created objects. It will be slow as well. Besides, if you push_back() new elements to it, the size() of the vector will further increase...
Getting image dimensions without reading the entire file
...rsion, height and width of a GIF image but couldn’t find anything useful online.
Fortunately in case of GIF, all the required information was in the first 10 bytes:
Type: Bytes 0-2
Version: Bytes 3-5
Height: Bytes 6-7
Width: Bytes 8-9
PNG are slightly more complex (width and height are 4-bytes...