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How to sort a list of objects based on an attribute of the objects?
I've got a list of Python objects that I'd like to sort by an attribute of the objects themselves. The list looks like:
8 ...
SQL, Postgres OIDs, What are they and why are they useful?
... two, you could do that using the oid column.
OIDs are implemented using 4-byte unsigned integers. They are not unique–OID counter will wrap around at 2³²-1. OID are also used to identify data types (see /usr/include/postgresql/server/catalog/pg_type_d.h).
In my experience, the feature is genera...
Read file line by line using ifstream in C++
...thods are:
Assume that every line consists of two numbers and read token by token:
int a, b;
while (infile >> a >> b)
{
// process pair (a,b)
}
Line-based parsing, using string streams:
#include <sstream>
#include <string>
std::string line;
while (std::getline(infil...
Compiled vs. Interpreted Languages
...terpreted language is one where the instructions are not directly executed by the target machine, but instead read and executed by some other program (which normally is written in the language of the native machine). For example, the same "+" operation would be recognised by the interpreter at run t...
What ports does RabbitMQ use?
...h other and the port mapper daemon for clustering to work.
PORT 35197
set by inet_dist_listen_min/max Firewalls must permit traffic in this range to pass between clustered nodes
RabbitMQ Management console:
PORT 15672 for RabbitMQ version 3.x
PORT 55672 for RabbitMQ pre 3.x
PORT 5672 RabbitMQ ...
Can anyone explain what JSONP is, in layman terms? [duplicate]
... security risks.
JSONP (JSON with Padding) is a method commonly used to
bypass the cross-domain policies in web browsers. (You are not allowed to make AJAX requests to a web page perceived to be on a different server by the browser.)
JSON and JSONP behave differently on the client and the server...
How to find the 'sizeof' (a pointer pointing to an array)?
...alue, but that's not using sizeof().
Another trick is the one mentioned by Zan, which is to stash the size somewhere. For example, if you're dynamically allocating the array, allocate a block one int bigger than the one you need, stash the size in the first int, and return ptr+1 as the pointer t...
git diff between two different files
...he --no-index option when running the command in a working tree controlled by Git and at least one of the paths points outside the working tree, or when running the command outside a working tree controlled by Git.
– mitenka
Jul 23 at 10:07
...
Choosing Java vs Python on Google App Engine
...a seems to have a longer list of libraries and especially support for Java bytecode regardless of the languages used to write that code. Which language will give better performance and more power? Please advise. Thank you!
...
Pointer to pointer clarification
... also used in statements to access the contents of the variable pointed at by a pointer (dereferencing operator).
– Lucas A.
Feb 11 '14 at 20:33
...