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How to convert a Django QuerySet to a list
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Be careful with this. When you cast this to a a list the distinct flag may become disregarded.
– rh0dium
Oct 1 '15 at 19:52
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Android - get children inside a View?
..., so the recursive call of getAllChildren could cause an exception, as the cast fails. So you should add a if (!(v instanceof ViewGroup)) return; before the cast
– Phil
Sep 27 '12 at 7:19
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Int division: Why is the result of 1/3 == 0?
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Explicitly cast it as a double
double g = 1.0/3.0
This happens because Java uses the integer division operation for 1 and 3 since you entered them as integer constants.
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C libcurl get output into a string
...callback has a char* as first argument, so you could use that and omit the casting. And lastly, s->resize() actually initializes the newly allocated space. As you are about to overwrite it anyway, s->reserve() would be more efficient.
– Jeinzi
Jan 31 '19 ...
How to use a servlet filter in Java to change an incoming servlet request url?
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Implement javax.servlet.Filter.
In doFilter() method, cast the incoming ServletRequest to HttpServletRequest.
Use HttpServletRequest#getRequestURI() to grab the path.
Use straightforward java.lang.String methods like substring(), split(), concat() and so on to extract the part o...
What are the differences between a pointer variable and a reference variable in C++?
...t pointer's target can be replaced by taking its address and using a const cast.
A reference's target cannot be replaced in any way short of UB.
This should permit the compiler to do more optimization on a reference.
share...
How do I pass a class as a parameter in Java?
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public void callingMethod(Class neededClass) {
//Cast the class to the class you need
//and call your method in the class
((ClassBeingCalled)neededClass).methodOfClass();
}
To call the method, you call it this way:
callingMethod(ClassBeingCalled.class);
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Relational Database Design Patterns? [closed]
... codepages.
Give every column a unique name. This make it easer on join to select the column. It is very difficult if every table has a column "ID" or "Name" or "Description". Use XyzID and AbcID.
Use a resource bundle or equals for complex SQL expressions. It make it easer to switch to another DBMS...
When should I use a struct rather than a class in C#?
...e that when a struct implements an interface - as Enumerator does - and is cast to that implemented type, the struct becomes a reference type and is moved to the heap. Internal to the Dictionary class, Enumerator is still a value type. However, as soon as a method calls GetEnumerator(), a reference-...
Convert a character digit to the corresponding integer in C
... numeralChar - '0' is already of type int, so you don't need the cast. Even if it wasn't, the cast is not needed.
– Alok Singhal
Feb 26 '10 at 5:15
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