大约有 23,000 项符合查询结果（耗时：0.0486秒） [XML]
HashSet vs LinkedHashSet
... answer lies in which constructors the LinkedHashSet uses to construct the base class:
public LinkedHashSet(int initialCapacity, float loadFactor) {
super(initialCapacity, loadFactor, true); // <-- boolean dummy argument
}
...
public LinkedHashSet(int initialCapacity) {
super(init...
How to parse/read a YAML file into a Python object? [duplicate]
.../wiki/PyYAMLDocumentation:
add_path_resolver(tag, path, kind) adds a path-based implicit tag resolver. A path is a list of keys that form a path to a node in the representation graph. Paths elements can be string values, integers, or None. The kind of a node can be str, list, dict, or None.
#!/usr...
How can I safely encode a string in Java to use as a filename?
...eason I tend to allow the user to enter what they want, store the filename based on a scheme of my own choosing (eg userId_fileId) and then store the user's filename in a database table. That way you can display it back to the user, store things how you want and you don't compromise security or wipe...
Can I implement an autonomous `self` member type in C++?
...oo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you want (thanks to variadic templates and variadic macros):
class WITH_SELF(Foo2)
{
/* ... */
};
class WITH_SELF_DERIVED(Bar2,Foo,Foo2)
{
/* ... */
};
I have verified this to work on gcc 4.8 and c...
How to rename a single column in a data.frame?
...
How there not a wrapper function for this in base?
– ifly6
Sep 6 '18 at 17:03
1
...
HTTP 401 - what's an appropriate WWW-Authenticate header value?
...n expiry when Basic Auth is used. I assume you're using some form of Forms based authentication.
From recollection, Windows Challenge Response uses a different scheme and different arguments.
The trick is that it's up to the browser to determine what schemes it supports and how it responds to them...
Is there a query language for JSON?
...or both together. And XPath 3.1 can too.
The list is growing:
JSONiq (based on XQuery)
UNQL (like SQL)
JaQL (functional)
JsonPath (XPath-like)
Json Query (sort of XPath-like)
GraphQL (template-based, typed)
share
...
What is the difference between Caching and Memoization?
...cific form of caching that involves caching the return value of a function based on its parameters.
Caching is a more general term; for example, HTTP caching is caching but not memoization.
Wikipedia says:
Although related to caching, memoization refers to a specific case of this optimization...
NSOperation vs Grand Central Dispatch
...
GCD is a low-level C-based API that enables very simple use of a task-based concurrency model. NSOperation and NSOperationQueue are Objective-C classes that do a similar thing. NSOperation was introduced first, but as of 10.5 and iOS 2, NSOperati...
Iterate over the lines of a string
...
1000 loops, best of 3: 406 usec per loop
not quite as good as the .find based approach -- still, worth keeping in mind because it might be less prone to small off-by-one bugs (any loop where you see occurrences of +1 and -1, like my f3 above, should automatically trigger off-by-one suspicions -- ...