Partitioning Operator: Take & TakeWhile

Method

Description

Take

This operator is used fetch the first “n” number of elements from the data source where “n” is integer which is passed as a parameter to the Take method.

TakeWhile

This operator behaves similarly to the take() method except that instead of taking the first “n” element of sequence , It takes all of initial elements of sequence that meet the criteria specified by the predicate, and stops on the first element that doesn’t meet the criteria

Example: Take() Method – C#

IList<string> strList = new List<string>(){ "One", "Two", "Three" };

var newList = strList.Take(2);

foreach(var str in newList)

    Console.WriteLine(str);

Output -

One

Two

Example: TakeWhile() Method – C#

IList<string> strList = new List<string>() { 

                                            "Three", 

                                            "Four", 

                                            "Five", 

                                            "Hundred"  };

var result = strList.TakeWhile(s => s.Length > 4);

foreach(string str in result)

        Console.WriteLine(str);

Output -

Three