大约有 15,000 项符合查询结果（耗时：0.0184秒） [XML]
.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...00 avgt 30 0.155 ▒ 0.004 us/op
c.a.p.SO29378922.preSize 1000 avgt 30 1.512 ▒ 0.031 us/op
c.a.p.SO29378922.preSize 5000 avgt 30 6.884 ▒ 0.130 us/op
c.a.p.SO29378922.preSize 10000 avgt 30 13.147 ▒ 0.199 us/op
c.a.p.SO29378922.preSize ...
Django - limiting query results
...ler())
In [23]: User.objects.all().order_by('-id')[:10]
(0.000) SELECT "auth_user"."id", "auth_user"."username", "auth_user"."first_name", "auth_user"."last_name", "auth_user"."email", "auth_user"."password", "auth_user"."is_staff", "auth_user"."is_active", "auth_user"."is_superuser"...
Hex representation of a color with alpha channel?
...reprocessor like SASS then you can pass an hex to rgba:
background:
rgba(#000, 0.5);
And the preprocessor just converts the hex code to rgb automatically.
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...
How to start nginx via different port(other than 80)
... change the VirtualHost statement in
sudo subl /etc/apache2/sites-enabled/000-default.conf
and change the 80 on the following line to something different :
<VirtualHost *:80>
then restart by :
sudo service apache2 restart
Nginx
Edit
/etc/nginx/sites-enabled/default
and change t...
How do I use a custom Serializer with Jackson?
...Register only a DoubleSerializer with DecimalFormat output pattern ###,##0.000, in SimpleModule and the output is:
{
"double1" : 1234.5678,
"Double1" : {
"value" : "91,011.121"
},
"student1" : {
"double2" : 1920.2122,
"Double2" : {
"value" : "2,324.253"
}
}
}
You c...
What is a rune?
...
With the recent Unicode 6.3, there are over 110,000 symbols defined. This requires at least 21-bit representation of each code point, so a rune is like int32 and has plenty of bits.
– Rick-777
Oct 12 '13 at 12:08
...
Get records with max value for each group of grouped SQL results
..., it started getting reported in the slow query log when attempted with 10,000+ rows sharing same ID. Was JOINing on indexed column. A rare case, but figured it's worth mentioning.
– chaseisabelle
Jul 26 '16 at 18:17
...
How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office?
... a lot of performance issues when dealing with large datasets(larger than 5000 rows with lots of columns). Currently doing a heavy modification of the code base at work so we can use it in a project.
– rossisdead
Oct 18 '11 at 23:17
...
Print array elements on separate lines in Bash?
... answered Feb 4 '17 at 0:07
0x000x00
12933 bronze badges
...
Fit cell width to content
...th</td>
</tr>
</table>
CSS:
td{
border:1px solid #000;
}
tr td:last-child{
width:1%;
white-space:nowrap;
}
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