大约有 15,000 项符合查询结果（耗时：0.0406秒） [XML]
Fast permutation -> number -> permutation mapping algorithms
...1. For the position that the next element ends up at, you have n-1 remaining possibilities, so you can describe this with a number between 0 and n-2.
Et cetera until you have n numbers.
As an example for n = 5, consider the permutation that brings abcde to caebd.
a, the first element, ends up at...
SQL standard to escape column names?
Is there a SQL standard to escape a column name? If not what works for MySQL and SQLite? does it also work for SQL Server?
...
ViewModel Best Practices
From this question , it looks like it makes sense to have a controller create a ViewModel that more accurately reflects the model that the view is trying to display, but I'm curious about some of the conventions (I'm new to the MVC pattern, if it wasn't already obvious).
...
How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
Is there a function in PHP that can decode Unicode escape sequences like " \u00ed " to " í " and all other similar occurrences?
...
Populating a razor dropdownlist from a List in MVC
...
You can separate out your business logic into a viewmodel, so your view has cleaner separation.
First create a viewmodel to store the Id the user will select along with a list of items that will appear in the DropDown.
ViewModel:
public class UserRoleViewMode...
Converting between java.time.LocalDateTime and java.util.Date
Java 8 has a completely new API for date and time. One of the most useful classes in this API is LocalDateTime , for holding a timezone-independent date-with-time value.
...
Why shouldn't all functions be async by default?
The async-await pattern of .net 4.5 is paradigm changing. It's almost too good to be true.
4 Answers
...
What is the advantage of using forwarding references in range-based for loops?
const auto& would suffice if I want to perform read-only operations. However, I have bumped into
3 Answers
...
How to make a smooth image rotation in Android?
I'm using a RotateAnimation to rotate an image that I'm using as a custom cyclical spinner in Android. Here's my rotate_indefinitely.xml file, which I placed in res/anim/ :
...
Clone() vs Copy constructor- which is recommended in java [duplicate]
clone method vs copy constructor in java. which one is correct solution. where to use each case?
6 Answers
...