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I want to get a difference between TakeWhile & Where LINQ methods .I got the following data from MSDN .But It didn't make sense to me
Where<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)Filters a sequence of values based on a predicate.
TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)Returns elements from a sequence as long as a specified condition is true.
All opinions are welcomed.
722
The Take() extension method returns the specified number of elements starting from the first element. Take & TakeWhile operator is Not Supported in C# query syntax. However, you can use Take/TakeWhile method on query variable or wrap whole query into brackets and then call Take/TakeWhile().
TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function.
TakeWhile method:The TakeWhile (Func...) will return elements starting from the beginning of an IEnumerable collection until it satisfies the condition specified. If the condition is false then it will return the collection immediately. Example I: int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
takeWhile is a built-in method in Haskell that inspects the original list using a given predicate and returns its elements until the condition is false.
TakeWhile stops when the condition is false, Where continues and find all elements matching the condition
var intList = new int[] { 1, 2, 3, 4, 5, -1, -2 }; Console.WriteLine("Where"); foreach (var i in intList.Where(x => x <= 3)) Console.WriteLine(i); Console.WriteLine("TakeWhile"); foreach (var i in intList.TakeWhile(x => x <= 3)) Console.WriteLine(i); Gives
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