大约有 15,572 项符合查询结果(耗时:0.0187秒) [XML]
The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
Why do I get Error "The type 'string' must be a non-nullable value type in order to use it as parameter 'T' in the generic type or method 'System.Nullable'"?
...
If table exists drop table then create it, if it does not exist just create it
...tement.
That statement drops the table if it exists but will not throw an error if it does not.
share
|
improve this answer
|
follow
|
...
Determine path of the executing script
...
Got the same error, with a saved scriptt and freshly installed and run R 3.2.0 on windows...
– RalfB
May 20 '15 at 9:57
...
Capturing console output from a .NET application (C#)
...cumentation; the only caveat is that you may have to redirect the standard error stream as well to see all output of your application.
Process compiler = new Process();
compiler.StartInfo.FileName = "csc.exe";
compiler.StartInfo.Arguments = "/r:System.dll /out:sample.exe stdstr.cs";
compiler.StartI...
How dangerous is it to compare floating point values?
... you code that appears to work at first but ends up having large-magnitude errors and broken corner cases.
First of all, if you want to program with floating point, you should read this:
What Every Computer Scientist Should Know About Floating-Point Arithmetic
Yes, read all of it. If that's too m...
How come a non-const reference cannot bind to a temporary object?
...ld get at the modified value anyway. He says that this, most likely, is an error.
– sbi
Oct 14 '09 at 16:56
2
...
Reset Entity-Framework Migrations
...
^^ Figured it out -- it was a TFS error -- if you're using TFS you need to perform a check-in before running the "Enable-Migrations ..." command. :D
– BrainSlugs83
Jun 17 '13 at 8:56
...
What does “Content-type: application/json; charset=utf-8” really mean?
.../json; charset=utf-8 in the message header. Without this header, I get an error from the service. I can also successfully use Content-type: application/json without the ;charset=utf-8 portion.
...
How do I POST urlencoded form data with $http without jQuery?
...(function(response) {
// on success
}, function(response) {
// on error
});
Works like a charm with AngularJS 1.5
People, let give u some advice:
use promises .then(success, error) when dealing with $http, forget about .sucess and .error callbacks (as they are being deprecated)
From t...
Failed loading english.pickle with nltk.data.load
..._data] Downloading package punkt to /home/my_user/nltk_data... [nltk_data] Error downloading 'punkt' from [nltk_data] <https://raw.githubusercontent.com/nltk/nltk_data/gh- [nltk_data] pages/packages/tokenizers/punkt.zip>: HTTP Error [nltk_data] 503: first byte timeout
...
