大约有 41,731 项符合查询结果（耗时：0.0410秒） [XML]
“using namespace” in c++ headers
In all our c++ courses, all the teachers always put using namespace std; right after the #include s in their .h files. This seems to me to be dangerous since then by including that header in another program I will get the namespace imported into my program, maybe without realizing, intending or...
What's the difference between => , ()=>, and Unit=>
I'm trying to represent a function that takes no arguments and returns no value (I'm simulating the setTimeout function in JavaScript, if you must know.)
...
Set up DNS based URL forwarding in Amazon Route53 [closed]
I'm trying to setup forwarding in Amazon Route53. My last DNS service (Nettica) allowed me to route requests to "aws.example.com" to "https://myaccount.signin.aws.amazon.com/console/".
...
Recursive sub folder search and return files in a list python
I am working on a script to recursively go through subfolders in a mainfolder and build a list off a certain file type. I am having an issue with the script. Its currently set as follows
...
Does Java have a HashMap with reverse lookup?
I have data that is organized in kind of a "key-key" format, rather than "key-value". It's like a HashMap, but I will need O(1) lookup in both directions. Is there a name for this type of data structure, and is anything like this included in Java's standard libraries? (or maybe Apache Commons?)
...
How can I validate a string to only allow alphanumeric characters in it?
How can I validate a string using Regular Expressions to only allow alphanumeric characters in it?
10 Answers
...
static linking only some libraries
How can I statically link only a some specific libraries to my binary when linking with GCC?
8 Answers
...
How does HTTP file upload work?
When I submit a simple form like this with a file attached:
5 Answers
5
...
Why aren't superclass __init__ methods automatically invoked?
Why did the Python designers decide that subclasses' __init__() methods don't automatically call the __init__() methods of their superclasses, as in some other languages? Is the Pythonic and recommended idiom really like the following?
...
Plot a legend outside of the plotting area in base graphics?
As the title says: How can I plot a legend outside the plotting area when using base graphics?
10 Answers
...