大约有 43,000 项符合查询结果(耗时:0.0390秒) [XML]

https://stackoverflow.com/ques... 

Array.sort() doesn't sort numbers correctly [duplicate]

...y otherwise. Anyone know why? You're getting a lexicographical sort (e.g. convert objects to strings, and sort them in dictionary order), which is the default sort behavior in Javascript: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/sort array.sort([compareFunction]) ...
https://stackoverflow.com/ques... 

Where is C not a subset of C++? [closed]

...definitions in C++ int n; int n; // ill-formed: n already defined int[] and int[N] not compatible (no compatible types in C++) int a[1]; int (*ap)[] = &a; // ill-formed: a does not have type int[] No K&R function definition style int b(a) int a; { } // ill-formed: grammar error Nest...
https://stackoverflow.com/ques... 

Simple calculations for working with lat/lon and km distance?

Is there a simple calculation I can do which will convert km into a value which I can add to a lat or lon float to calculate a bounding box for searches? It doesn't need to be completely accurate. ...
https://stackoverflow.com/ques... 

What is the proper declaration of main?

... signature of the main function in C++? What is the correct return type, and what does it mean to return a value from main ? What are the allowed parameter types, and what are their meanings? ...
https://stackoverflow.com/ques... 

How does collections.defaultdict work?

...re precisely, it's an arbitrary "callable" object, which includes function and type objects). For the first example, default items are created using int(), which will return the integer object 0. For the second example, default items are created using list(), which returns a new empty list object....
https://stackoverflow.com/ques... 

What's the difference between integer class and numeric class in R

...ouble precision floating point numbers) and integer. R will automatically convert between the numeric classes when needed, so for the most part it does not matter to the casual user whether the number 3 is currently stored as an integer or as a double. Most math is done using double precision, so ...
https://stackoverflow.com/ques... 

What's the difference between IQueryable and IEnumerable

...like LINQ-to-SQL to exist because they can parse the expression tree and convert it into equivalent SQL. And because the provider doesn't need to execute until the IQueryable is enumerated (it implements IEnumerable<T>, after all), it can combine multiple query operators (in the above exampl...
https://stackoverflow.com/ques... 

How to pass optional arguments to a method in C++?

... else do_something_else(); } you can call myfunc in both ways and both are valid myfunc(10); // Mode will be set to default 0 myfunc(10, 1); // Mode will be set to 1 share | impr...
https://stackoverflow.com/ques... 

Can I call a base class's virtual function if I'm overriding it?

Say I have classes Foo and Bar set up like this: 7 Answers 7 ...
https://stackoverflow.com/ques... 

What is the difference between an int and a long in C++?

... (an answer by example) with some of the details below regarding the C++ standard. The draft for C++0x is at open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2798.pdf and it is marked up so you can see the differences between it and the last rev. – Patrick Johnmeyer ...