Interface IOccurrencesCounter

An object able to count the number of occurrences of each item of a , also known as Count Array.

Namespace: MoreStructures.Lists.Counting
Assembly: MoreStructures.dll
Syntax
public interface IOccurrencesCounter

Methods

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Count<T>(IEnumerable<T>)

For each item t of type T in enumerable and for each index i of E, counts the total number of items equal to t in E[0..i] (extremes included).

Declaration
IDictionary<T, IDictionary<int, int>> Count<T>(IEnumerable<T> enumerable)
Parameters
Type Name Description
IEnumerable<T> enumerable

The enumerable, to count the items of.
Returns
Type Description
IDictionary<T, IDictionary<System.Int32, System.Int32>>

A new, lazy evaluated two-levels dictionary of System.Int32, the 1st-level one having as many items as the number of distinct chars in enumerable, the 2nd-level one having as many items as the length of enumerable.
Type Parameters
Name Description
T

The type of items of enumerable. Required to be a non-nullable type (value or reference).
Examples
var counter = ...
var enumerable = new List<int> { 1, 4, 2, 1, 3, 4, 2, 2 }
var counts = counter.Count(enumerable) 
// Result = 
// { 
//      [1, 0] = 1, [2, 0] = 0, [3, 0] = 0,  [4, 0] = 0, // Counts by char in E[0..0]
//      [1, 1] = 1, [2, 1] = 0, [3, 1] = 0,  [4, 1] = 1, // Counts by char in E[0..1]
//      [1, 2] = 1, [2, 2] = 1, [3, 2] = 0,  [4, 2] = 1, // Counts by char in E[0..2]
//      ...
//      [1, 7] = 2, [2, 7] = 2, [3, 7] = 1,  [4, 7] = 2, // Counts by char in E[0..7]
// }

Extension Methods