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How to check if field is null or empty in MySQL?
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answered May 15 '18 at 14:05
Gleb KemarskyGleb Kemarsky
7,85855 gold badges3232 silver badges5555 bronze badges
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Git: “please tell me who you are” error
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Can you explain how is it working and why it was giving error before doing this?
– Chinmaya B
Sep 19 '16 at 20:34
1
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Google Maps: How to create a custom InfoWindow?
The default Google Maps InfoWindow for a map marker is very round. How do I create a custom InfoWindow with square corners?
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No appenders could be found for logger(log4j)?
...ate to the folder that contains your log4j.properties file
Apply
Run
The error message should no longer appear.
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How can I drop all the tables in a PostgreSQL database?
...web2py), using the former caused problems:
<class 'psycopg2.ProgrammingError'> no schema has been selected to create in
So to my mind the fully correct answer is:
DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
GRANT ALL ON SCHEMA public TO postgres;
GRANT ALL ON SCHEMA public TO public...
make arrayList.toArray() return more specific types
So, normally ArrayList.toArray() would return a type of Object[] ....but supposed it's an
Arraylist of object Custom , how do I make toArray() to return a type of Custom[] rather than Object[] ?
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C++ 读写xml方法整理（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...re(_T("1")) == 0)
param.forceUpdate = true;
}
else
{
LOG_ERROR(_T("配置文件%s 没有update节点！"), szFile);
}
}
else
{
LOG_ERROR(_T("配置文件%s 没有根节点！"), szFile);
}
}
else
{
LOG_ERROR(_T("配置文件%s 错误！"), szFile);
}
GetAttrib...
Sublime Text 2 keyboard shortcut to open file in specified browser (e.g. Chrome)
... @NeilMonroe Activate logging commands in the console to see possible errors sublime.log_commands(True)
– aanton
Oct 21 '14 at 9:56
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How to wait for a keypress in R?
...hod is that if you type something that is not a number, it will display an error.
print ("Press [enter] to continue")
number <- scan(n=1)
Wrapping into a function:
readkey <- function()
{
cat("[press [enter] to continue]")
number <- scan(n=1)
}
Method 3
Imagine you want to wa...