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How to hide command output in Bash
...o remember: >&2 redirects stdout to descriptor 2 (stderr), >&3 redirects stdout to descriptor 3, and >&- redirects stdout to a dead end (i.e. it closes stdout).
Also beware that some commands may not handle a closed file descriptor particularly well ("write error: Bad file desc...
SQL Server : Columns to Rows
...
indicatorvalue
for indicatorname in (Indicator1, Indicator2, Indicator3)
) unpiv;
Note, the datatypes of the columns you are unpivoting must be the same so you might have to convert the datatypes prior to applying the unpivot.
You could also use CROSS APPLY with UNION ALL to convert the col...
Sorting multiple keys with Unix sort
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Ken GentleKen Gentle
12.9k11 gold badge3939 silver badges4949 bronze badges
7
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C＋＋模板的特化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...个不错的网址：
http://www.cnblogs.com/cutepig/archive/2009/02/12/1389479.html
http://read.newbooks.com.cn/info/175115.html
先说类模板的特化吧：
谁都没的说的全特化：
// general version
template<class T>
class Compare
{
public:
static bool IsEqual(const T...
Combine two or more columns in a dataframe into a new column with a new name
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132
Use paste.
df$x <- paste(df$n,df$s)
df
# n s b x
# 1 2 aa TRUE 2 aa
# 2 3 bb ...
Bash script to set up a temporary SSH tunnel
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330
You can do this cleanly with an ssh 'control socket'. To talk to an already-running SSH proces...
How to show all privileges from a user in oracle?
...prior granted_role = grantee start with grantee = '&USER' order by 1,2,3;
select * from dba_sys_privs where grantee = '&USER' or grantee in (select granted_role from dba_role_privs connect by prior granted_role = grantee start with grantee = '&USER') order by 1,2,3;
select * from dba_ta...
Permission is only granted to system app
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answered Dec 10 '12 at 13:44
OleOle
7,36122 gold badges2626 silver badges3434 bronze badges
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Bootstrap Carousel : Remove auto slide
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edited Jun 10 at 13:47
answered Feb 20 '13 at 10:22
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Docker how to change repository name or rename image?
...ker image tag server:latest myname/server:latest
or
docker image tag d583c3ac45fd myname/server:latest
Tags are just human-readable aliases for the full image name (d583c3ac45fd...).
So you can have as many of them associated with the same image as you like. If you don't like the old name you...