大约有 4,918 项符合查询结果（耗时：0.0186秒） [XML]
Map and Reduce in .NET
...ave linq then you don’t need to write your own map and reduce functions. C# 3.5 and Linq already has it albeit under different names.
Map is Select:
Enumerable.Range(1, 10).Select(x => x + 2);
Reduce is Aggregate:
Enumerable.Range(1, 10).Aggregate(0, (acc, x) => acc + x);
Filter is Whe...
How to merge a list of lists with same type of items to a single list of items?
...
Here's the C# integrated syntax version:
var items =
from list in listOfList
from item in list
select item;
share
|
impr...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...re sense to use Argon2 these days anyway, for which there is a well-tested C# library
– Polynomial
Jan 2 '17 at 21:43
|
show 16 more comment...
Getting the first and last day of a month, using a given DateTime object
...DateTime. They relate to DateTime type itself.
Suggested reading: static (C# Reference)
UPDATE: Getting month range:
DateTime date = ...
var firstDayOfMonth = new DateTime(date.Year, date.Month, 1);
var lastDayOfMonth = firstDayOfMonth.AddMonths(1).AddDays(-1);
...
Why does this go into an infinite loop?
...
Note: Originally I posted C# code in this answer for purposes of illustration, since C# allows you to pass int parameters by reference with the ref keyword. I've decided to update it with actual legal Java code using the first MutableInt class I found...
String vs. StringBuilder
... the KB article "How to improve string concatenation performance in Visual C#".
I have always tried to code for clarity first, and then optimize for performance later. That's much easier than doing it the other way around! However, having seen the enormous performance difference in my applications...
How to load assemblies in PowerShell?
...with your reflector. I've used ILSpy for this because it's FLOSS, but any C# reflector should work. Open that library, and look in Microsoft.Powershell.Commands.Utility. Under Microsoft.Powershell.Commands, there should be AddTypeCommand.
In the code listing for that, there is a private class, In...
How to get a complete list of ticker symbols from Yahoo Finance? [closed]
...
There is a nice C# wrapper for the Yahoo.Finance API at http://code.google.com/p/yahoo-finance-managed/ that will get you there. Unfortunately there is no direct way to download the ticker list but the following creates the list by iterating...
What are attributes in .NET?
...tten for you but sometimes you have to write it yourself. For example, the C# compiler cares about some and certain frameworks frameworks use some (e.g. NUnit looks for [TestFixture] on a class and [Test] on a test method when loading an assembly).
So when creating your own custom attribute be aware...
Code equivalent to the 'let' keyword in chained LINQ extension method calls
Using the C# compilers query comprehension features, you can write code like:
4 Answers
...