大约有 44,000 项符合查询结果（耗时：0.0150秒） [XML]
list.clear() vs list = new ArrayList(); [duplicate]
...uld remove the elements without reducing the capacity of the list.
groovy:000> mylist = [1,2,3,4,5,6,7,8,9,10,11,12]
===> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
groovy:000> mylist.elementData.length
===> 12
groovy:000> mylist.elementData
===> [Ljava.lang.Object;@19d6af
groovy:000...
How to print number with commas as thousands separators?
...ocale(locale.LC_ALL, 'en_US')
'en_US'
>>> locale.format("%d", 1255000, grouping=True)
'1,255,000'
Sure, you don't need internationalization support, but it's clear, concise, and uses a built-in library.
P.S. That "%d" is the usual %-style formatter. You can have only one formatter, but ...
Multiprocessing vs Threading Python [duplicate]
...iters):
result = (result * result * i + 2 * result * i * i + 3) % 10000000
return result
class CpuThread(threading.Thread):
def __init__(self, niters):
super().__init__()
self.niters = niters
self.result = 1
def run(self):
self.result = cpu_func(s...
Convert UTC date time to local date time
.../wiki/ISO_8601
IN this case the server would return '2011-06-29T16:52:48.000Z' which would feed directly into the JS Date object.
var utcDate = '2011-06-29T16:52:48.000Z'; // ISO-8601 formatted date returned from server
var localDate = new Date(utcDate);
The localDate will be in the right loca...
Identifying and removing null characters in UNIX
...
I’d use tr:
tr < file-with-nulls -d '\000' > file-without-nulls
If you are wondering if input redirection in the middle of the command arguments works, it does. Most shells will recognize and deal with I/O redirection (<, >, …) anywhere in the comman...
Paging with Oracle
...at 1 and increments for each row. So in this snippet of code, if you have 1000 rows, the sort order is applied and then each row is assigned a rownum. The outer select(s) use those row numbers to locate the 'page' you are looking for based on your pagesize.
– Brian Schmitt
...
http to https apache redirection
...od ssl
2) Edit your site config
Edit file
/etc/apache2/sites-available/000-default.conf
Content should be:
<VirtualHost *:80>
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
</VirtualHost>
<VirtualHost *:443>
SSL...
how to make a whole row in a table clickable as a link?
...lt;td>Blah Blah</td> <td>1234567</td> <td>£158,000</td>
</tr>
</tbody>
jQuery(document).ready(function($) {
$(".clickable-row").click(function() {
window.location = $(this).data("href");
});
});
Of course you don't have to use href...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...nswered Sep 6 '10 at 15:00
Dummy00001Dummy00001
14.4k55 gold badges3131 silver badges5555 bronze badges
...
python pandas remove duplicate columns
... number of columns you can have. For me it failed for a dataframe with 100,000 rows for instance, as this yields 100,000 columns after transposing, which is not possible
– Eelco van Vliet
Mar 3 at 10:08
...