大约有 3,516 项符合查询结果（耗时：0.0253秒） [XML]
Check if a given key already exists in a dictionary
...you wanted a default, you can always use dict.get():
d = dict()
for i in range(100):
key = i % 10
d[key] = d.get(key, 0) + 1
and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:...
Android. WebView and loadData
..., I tried with UTF-8 and with latin-1 and with ISO-8859-1, but saw still strange signs instead of ü, ö, ä. But I have another idea, I'll try to convert byte stream from server into string using right encoding. maybe, that'll help me
– Tima
Dec 7 '10 at 10:14...
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:
...
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".
...
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
...
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/
share
|
...
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.
share
|
improve this answer
|
...
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...