.NET collections - Language Integrate Query - LINQ study series (II)

July 29, 2016

More reading about LINQ:

Google search keywords:

1. basic code patterns used for LINQ

2. .NET collections

https://msdn.microsoft.com/en-us/library/bb399365(v=vs.110).aspx

Notes from the above article:

LINQ queries 

in-memory objects

object type 

IEnumerable

IEnumerable<T>

object type implements IEnumberable or IEnumerable<T>

LINQ common pattern for accessing data vs standard foreach loops

more concise and readable 

LINQ 3 capabilities: 

filtering

ordering

grouping capabilities

LINQ 

improve performance

common variations of data collections:

hash tables, 

queues, 

stacks, 

bags   ? 

dictionaries

lists

3 Interfaces:

ICollection

IList

IDictionary

generic conterparts

ICollection -> IList

ICollection -> IDictionary

3 examples based on IList

Array

ArrayList

List<T>

4 examples based on ICollection - 1 value

Queue, 

ConcurrentQueue<T>

Stack

ConcurrentStack<T>

LinkedList<T>

5 examples based on IDictionary - 2 values, both a key and a value

Hashtable

SortedList

Dictionary<TKey,TValue>

SoretdList<TKey, TValue> 

ConcurrentDictionary<TKey, Tvalue> 

Special one - a list of values with keys embedded within the values and, therefore, it behaves like a list and like a dictionary

KeyedCollection<TKey,TItem> 

class vs generic classes ? 

Generic collections

strong typing

Ready for this - memorize the claim: Julia likes it - reading is quickest way to become an expert!

Generic collections are the best solution to strong typing

-- Julia likes strong typing, find problems in compile time, fix bugs in static analysis, no debugging/test cases' help

-- Design the function to less error prone - as simple as possible

-- do one task only

Facts? Look into google: 

some languages does not support generics - which one, not C#

behaviors:

how they are sorted

how searches are performed

how comparisons are made