大约有 7,400 项符合查询结果（耗时：0.0237秒） [XML]
How can the Euclidean distance be calculated with NumPy?
...t(x^2 + y^2 + z^2)) so we're making a lot of sqrt calls. Math 101:
dist = root ( x^2 + y^2 + z^2 )
:.
dist^2 = x^2 + y^2 + z^2
and
sq(N) < sq(M) iff M > N
and
sq(N) > sq(M) iff N > M
and
sq(N) = sq(M) iff N == M
In short: until we actually require the distance in a unit of X rather th...
How to change an Eclipse default project into a Java project
...
@flashdisk it should be in the root directory of the project.
– Chris Marasti-Georg
Apr 16 '15 at 21:08
|
...
How Do I Get the Query Builder to Output Its Raw SQL Query as a String?
...eir values. To get the queries in their entirety you need to log them from MySQL. There's more info here: stackoverflow.com/questions/1786322/…
– Matthew
Aug 31 '14 at 20:20
41
...
Linux环境离线安装docker&docker-compose - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
.../daemon.json
# 在文件中添加一下内容：
{
"data-root": "/data/app/dockerWork",
"insecure-registries": ["ss.suwell.com"],
"registry-mirrors": ["https://geuj9lut.mirror.aliyuncs.com"]
}
备注：可能会存在直接复制粘贴后的json文件不可用的情况...
apache redirect from non www to www
...
<VirtualHost *:80>
DocumentRoot "what/ever/root/to/source"
ServerName www.example.com
<Directory "what/ever/root/to/source">
Options FollowSymLinks MultiViews Includes ExecCGI
AllowOverride All
Order allo...
Code coverage for Jest
...After executing jest, you can get coverage report on console and under the root folder set by jest, you will find the coverage report in json and html format.
4) FYI, if you install from npm, you might not get the latest version; so try the github first and make sure the coverage is what you need.
...
What is an ORM, how does it work, and how should I use one? [closed]
...most popular is relational ( you know tables, columns, pk fk etc eg Oracle MySQL, MS-SQL )
And finally the Mapping part is where you do a bridge between your objects and your tables.
In applications where you don't use a ORM framework you do this by hand. Using an ORM framework would allow you d...
scp with port number specified
...t 80
User username
Then you can use:
scp username@www.myserver.com:/root/file.txt .
or
scp short:/root/file.txt .
You can use anything on the "Host" line with ssh, scp, rsync, git & more
There are MANY configuration option that you can use in config files, see:
man ssh_config
...
Retaining file permissions with Git
...ssions for all the files in the repository and store them in a file in the root of the repository called .permissions and then add the .permissions file to the commit.
The second hook is called when you "checkout" and will go through the list of files in the .permissions file and restore the owners...
How do I search for an object by its ObjectId in the mongo console?
...h multiple object Ids just like the way we implement WHERE IN condition in mysql.
– Pratswinz
Jan 13 '16 at 12:00
This...