大约有 47,000 项符合查询结果（耗时：0.0622秒） [XML]
What is the !! (not not) operator in JavaScript?
...
This is used to convert truthy values to boolean true, and falsy values too boolean false.
– thetoolman
Jul 16 '12 at 3:53
13
...
Troubleshooting BadImageFormatException
I have a Windows service written in C# using Visual Studio 2010 and targeting the full .NET Framework 4. When I run from a Debug build the service runs as expected. However, when I run it from a Release build I get a System.BadImageFormatException (details below). I've been searching the internet...
Should programmers use SSIS, and if so, why? [closed]
...ng code? We have a ton of packages in production where I currently work, and they're a nightmare to both "write" (perhaps draw?) and maintain. Each package looks like a bowl of multicolored spaghetti with C# and VB.NET scripts mixed in at the points where the abstractions break down. To figure out...
Which is the preferred way to concatenate a string in Python?
...ring to a string variable is to use + or +=. This is because it's readable and fast. They are also just as fast, which one you choose is a matter of taste, the latter one is the most common. Here are timings with the timeit module:
a = a + b:
0.11338996887207031
a += b:
0.11040496826171875
Howeve...
How to find event listeners on a DOM node when debugging or from the JavaScript code?
I have a page where some event listeners are attached to input boxes and select boxes. Is there a way to find out which event listeners are observing a particular DOM node and for what event?
...
How to check if field is null or empty in MySQL?
...
end as field1
from tablename
If you only want to check for null and not for empty strings then you can also use ifnull() or coalesce(field1, 'empty'). But that is not suitable for empty strings.
share
|
...
Division of integers in Java [duplicate]
...on but I can't find an answer. I've looked into floating point arithmetic and a few other topics but nothing has seemed to address this. I'm sure I just have the wrong terminology.
...
socket.shutdown vs socket.close
...
Calling close and shutdown have two different effects on the underlying socket.
The first thing to point out is that the socket is a resource in the underlying OS and multiple processes can have a handle for the same underlying socket.
W...
Break or return from Java 8 stream forEach?
...ING: You should not use it for controlling business logic, but purely for handling an exceptional situation which occurs during the execution of the forEach(). Such as a resource suddenly stops being accessible, one of the processed objects is violating a contract (e.g. contract says that all the el...
How to grant remote access permissions to mysql server for user?
...
I executed the command in mysql, but SHOW GRANTS still shows the same (as in my question). I even did FLUSH PRIVILGES. Is there something I miss?
– Aufwind
Jun 4 '11 at 20:33
...