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PyCharm shows unresolved references error for valid code
...ion, but PyCharm is highlighting my valid code with "unresolved reference" errors, even for built-in Python functions. Why don't these seem to be detected, even though the code runs? Is there any way to get PyCharm to recognize these correctly?
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NHibernate.MappingException: No persister for: XYZ
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This was my problem also, get the same error as in Q when doing get. When trying to query all of the objects of that type, no error, just an empty result set!
– Christoph
May 18 '15 at 15:34
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how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
...ry nice and short
<img src="imagenotfound.gif" alt="Image not found" onerror="this.src='imagefound.gif';" />
But, be careful. The user's browser will be stuck in an endless loop if the onerror image itself generates an error.
EDIT
To avoid endless loop, remove the onerror from it at once...
error: writable atomic property cannot pair a synthesized setter/getter with a user defined setter/g
...ode project (which used to compile just fine), and now I'm seeing a lot of errors of this form:
4 Answers
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Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...
Debug Error "pure virtual function call" 原因解析结论：一般在构造、析构函数中调用虚函数就可能出这个错误，检查纯虚函数，看看有没有在构造析构函数中调用。以下来自：http: www.kuqin.c...结论：一般在构造、析构函数中调用虚函数...
Logging best practices [closed]
...gs/uses the event ids, and can make it easy to provide guidance for common errors, e.g. error 5178 means your database connection string is wrong, etc.
Event id's should follow some kind of structure (similar to the Theory of Reply Codes used in email and HTTP), which allows you to treat them by ca...
What is Type-safe?
... means that the compiler will validate types while compiling, and throw an error if you try to assign the wrong type to a variable.
Some simple examples:
// Fails, Trying to put an integer in a string
String one = 1;
// Also fails.
int foo = "bar";
This also applies to method arguments, since yo...
Directory does not exist. Parameter name: directoryVirtualPath
i just published my project to my host on Arvixe and get this error (Works fine local):
20 Answers
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Should a retrieval method return 'null' or throw an exception when it can't produce the return value
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Only throw an exception if it is truly an error. If it is expected behavior for the object to not exist, return the null.
Otherwise it is a matter of preference.
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Java Generics: Cannot cast List to List? [duplicate]
...> x = new ArrayList<String>(); #1 compiles fine but #2 gives an error: incompatible types found : java.util.ArrayList<java.lang.String> required: java.util.List<java.lang.Object> List<Object> x = new ArrayList<String>(); It was baffling but thanks to the Java G...