C#: List class API

Oct. 28, 2019

Introduction

It is time for me to learn all API of C# List class. I like to figure out how to expedite my coding using C#.

Motivation

I was so surprised to read C# code written by one of senior engineers, and then I asked myself how come I never used those two APIs.

Here is the link.

	public class Solution
	{
	public IList<int> CircularPermutation(int n, int start)
	{
	var result = new List<int>();
	for(int i = 0; i < Math.Pow(2, n); i++)
	result.Add(i ^ (i >> 1));
	var index = result.IndexOf(start);
	var left = result.Take(index).ToList();
	var right = result.Skip(index).ToList();
	right.AddRange(left);
	return right;
	}
	}

view raw 1238CircularPermutation.cs hosted with ❤ by GitHub

Here is to learn IEnumerable.Skip, IEnumerable.Take API.

Array's APIs

Array's available method and function are listed in the following, 72 options. I like to memorize all of them, and a few words are new to me. I like to get to know those methods first.

0
Add
AddRange
AsReadOnly
BinarySearch
Clear
Contains
ConvertAll
CopyTo
Exists
Find

FindAll
FindIndex
FindLast
FindLastIndex

1

Aggregate

All

Any

AsEnumerable

AsParallel

AsParallel<>

AsQuerable

AsQuerable<>

Average

Average<> 2

Cast<>

Clone

Concat<>

Contain<>

CopyTo<>

Count<>

DefaultIfEmpty

Distinct

ElementAt

ElementAtOrDefault 3

Equals

Except<>

FirstOrDefault<>

First<>

GetEnumerator

GetHashCode

GetLength

GetLongLength

GetLowerBound

GetType 4

GetUpperBound

GetType

GetUpperBound

GetValue

GroupBy

GroupJoin

Initialize

Intersect

Join

Last 5

LastOrDefault

Length

IsFixedSize

IsReadONly

IsSyncrhonized

Max

Max<>

Min

Min<>

OfType<> 6

OrderBy<>

OrderByDescending<>

Rank

Reverse<>

Select<>

SelectMany<>

SequenceEqual<>

SetValue

Single<>

SingleOrDefault<> 7

Skip<>

SkipWhile<>

Sum

Sum<>

SyncRoot

Take<>

TakeWhile

ToArray

ToDictionary

ToList 8

ToLookup

ToString

Union<>

Where<>

Zip