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MySQL Results as comma separated list
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You can use GROUP_CONCAT to perform that, e.g. something like
SELECT p.id, p.name, GROUP_CONCAT(s.name) AS site_list
FROM sites s
INNER JOIN publications p ON(s.id = p.site_id)
GROUP BY p.id, p.name;
share
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NULL values inside NOT IN clause
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Query A is the same as:
select 'true' where 3 = 1 or 3 = 2 or 3 = 3 or 3 = null
Since 3 = 3 is true, you get a result.
Query B is the same as:
select 'true' where 3 <> 1 and 3 <> 2 and 3 <> null
When ansi_nulls is on, 3 <&...
Converting String to “Character” array in Java
I want to convert a String to an array of objects of Character class but I am unable to perform the conversion. I know that I can convert a String to an array of primitive datatype type "char" with the toCharArray() method but it doesn't help in converting a String to an array of objects of C...
libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...来对curl_global_init做的工作清理。类似于close的函数。
3.char *curl_version( );
描述: 打印当前libcurl库的版本。
4）CURL *curl_easy_init( );
描述:
curl_easy_init用来初始化一个CURL的指针(有些像返回FILE类型的指针一样). 相应的在调用结束时...
Way to get all alphabetic chars in an array in PHP?
Is there a way to get all alphabetic chars (A-Z) in an array in PHP so I can loop through them and display them?
14 Answers...
When is a C++ destructor called?
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I think Foo myfoo("foo") is not Most Vexing Parse, but char * foo = "foo"; Foo myfoo(foo); is.
– Cosine
May 13 '14 at 0:58
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URL encoding in Android
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This method doesn't encode characters like ğ to %C4%9F. Accepted one encodes!
– Alexander Prokofyev
May 30 '15 at 15:11
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Static constant string (class member)
... requirement for using a STL string, you might as well just define a const char*. (less overhead)
– KSchmidt
Oct 14 '09 at 2:23
51
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How to Parse Command Line Arguments in C++? [duplicate]
...d option has been passed in like -h for help.
#include <algorithm>
char* getCmdOption(char ** begin, char ** end, const std::string & option)
{
char ** itr = std::find(begin, end, option);
if (itr != end && ++itr != end)
{
return *itr;
}
return 0;
}
b...
Generate a random letter in Python
...tates If the relative weights or cumulative weights are not specified, the selections are made with equal probability. This would mean, that the distribution is the discrete uniform distribution (en.wikipedia.org/wiki/Discrete_uniform_distribution).
– Qaswed
Oc...