大约有 11,293 项符合查询结果（耗时：0.0248秒） [XML]
Lambda function in list comprehensions
...e following two list comprehensions different, even though f and the lambda function are the same?
6 Answers
...
Checking length of dictionary object [duplicate]
...
What I do is use Object.keys() to return a list of all the keys and then get the length of that
Object.keys(dictionary).length
share
|
impr...
Ruby send vs __send__
I understand the concept of some_instance.send but I'm trying to figure out why you can call this both ways. The Ruby Koans imply that there is some reason beyond providing lots of different ways to do the same thing. Here are the two examples of usage:
...
How to provide animation when calling another activity in Android?
I have two Activities A and B. I want to have the shrink Animation when
Activity A calls B and maximize animation when Activity B calls A. I don't need the animation xml files for this.
...
Checking if a double (or float) is NaN in C++
...isons involving them are always false. That is, for a float f, f != f will be true only if f is NaN.
Note that, as some comments below have pointed out, not all compilers respect this when optimizing code.
For any compiler which claims to use IEEE floating point, this trick should work. But I ca...
What does the C++ standard state the size of int, long type to be?
I'm looking for detailed information regarding the size of basic C++ types.
I know that it depends on the architecture (16 bits, 32 bits, 64 bits) and the compiler.
...
What's the difference between belongs_to and has_one?
What is the difference between a belongs_to and a has_one ?
5 Answers
5
...
MySQL INSERT INTO table VALUES.. vs INSERT INTO table SET
What is main difference between INSERT INTO table VALUES .. and INSERT INTO table SET ?
3 Answers
...
What is the difference between “text” and new String(“text”)?
What is the difference between these two following statements?
12 Answers
12
...
Why does Math.Round(2.5) return 2 instead of 3?
...
Firstly, this wouldn't be a C# bug anyway - it would be a .NET bug. C# is the language - it doesn't decide how Math.Round is implemented.
And secondly, no - if you read the docs, you'll see that the default rounding is "round to even" (banker's ro...