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What is the difference between an expression and a statement in Python?
...lue", which can be any Python object. Examples:
3 + 5
map(lambda x: x*x, range(10))
[a.x for a in some_iterable]
yield 7
Statements (see 1, 2), on the other hand, are everything that can make up a line (or several lines) of Python code. Note that expressions are statements as well. Examples:
...
Is there a difference between “==” and “is”?
...s out the reference implementation of Python caches integer objects in the range -5..256 as singleton instances for performance reasons. Here's an example demonstrating this:
>>> for i in range(250, 260): a = i; print "%i: %s" % (i, a is int(str(i)));
...
250: True
251: True
252: True
253...
MySQL Data - Best way to implement paging?
...ge of large OFFSETs. They avoid using OFFSET with a variety of techniques, ranging from id range selections in the WHERE clause, to some kind of caching or pre-computing pages.
There are suggested solutions at Use the INDEX, Luke:
"Paging Through Results".
"Pagination done the right way".
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Distributed sequence number generation?
...scale manner. You could look into things like network broadcasts, windowed ranges for each worker, and distributed hash tables for unique worker IDs, but it's a lot of work.
Unique IDs are another matter, there are several good ways of generating unique IDs in a decentralized manner:
a) You could ...
How to read/process command line arguments?
... parser.add_argument(
'integers', metavar='int', type=int, choices=range(10),
nargs='+', help='an integer in the range 0..9')
parser.add_argument(
'--sum', dest='accumulate', action='store_const', const=sum,
default=max, help='sum the integers (default: find the ...
Is the LIKE operator case-sensitive with MSSQL Server?
...
It seems the range of characters like [A-Z] is always case-insensitive. [ABCDEFGHIJKLMNOPQRSŠTUVWXYZŽÅÄÖ] however seems to obey collation.
– jumxozizi
Oct 31 '16 at 15:49
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How can I shift-select multiple checkboxes like GMail?
... of checkboxes with the following code snippet:
$('#table4').checkboxes({ range: true });
Here is the link to the documentation, demo & download: http://rmariuzzo.github.io/checkboxes.js/
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Why does InetAddress.isReachable return false, when I can ping the IP address?
...privileges to perform the check. Probably due to use of ports in the lower range. If you run your java program with sudo/superuser, I'll bet it works.
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What's the “average” requests per second for a production web application?
...r your question, we have been doing a huge load test ourselves and find it ranges on various amazon hardware we use(best value was the 32 bit medium cpu when it came down to $$ / event / second) and our requests / seconds ranged from 29 requests / second / node up to 150 requests/second/node.
Giving...
Accessing members of items in a JSONArray with Java
...to List<JSONObject>
List<JSONObject> jsonItems = IntStream.range(0, jsonArray.length())
.mapToObj(index -> (JSONObject) jsonArray.get(index))
.collect(Collectors.toList());
// you can access the array elements now
jsonItems.forEach(arrayElement -&g...