C# find array index by value

Author: hnfw

August undefined, 2024

WebOct 29, 2014 · str.Select ( (v,i) => new {Index = i, Value = v}) // Pair up values and indexes .Where (p => p.Value == "avg") // Do the filtering .Select (p => p.Index); // Keep the index and drop the value The key step is using the overload of Select that supplies the current index to your functor. Share Improve this answer Follow answered Nov 8, 2012 at 15:16 WebMay 24, 2024 · Sorted by: 29 You could use a simple LINQ extension method to search for the object. var foundItem = myArray.SingleOrDefault (item => item.intProperty == someValue); Here is some MSDN information regarding LINQ to get you more familiar. EDIT for the code posted.

Get index of a key/value pair in a C# dictionary based on the value

Web5 hours ago · when i try to read values from a .CVS-file i get sometimes a "System.IndexOutOfRangeException - Index was outside the bounds of the array" when a cell that represents an arrayindex is empty. my code looks like this. WebNov 28, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. diabetic shoes for women slip resistant

.net - getting a "System.IndexOutOfRangeException - Index was …

WebJul 16, 2010 · Sure when you're looking at the line Tuple coordinate = matrix.CoordinatesOf(5) you can easily guess that it's a coordinate/point but once that value moves through the system it becomes just a Tuple leaving some poor dev to track down the source to learn what Tuple actually represents. WebJul 21, 2013 · 4 Answers Sorted by: 3 You'll need to loop through the array using the Array.GetLowerBound and Array.GetUpperBound methods. The Array.IndexOf and Array.FindIndex methods don't support multidimensional arrays. For example: WebThis is certainly easy and recommendable. If you do not have access to Linq, or do not want to use Linq, you can rely on some explicit interface implementation of the array. Since .NET 1.1 we have ((IList)printer).Contains("Jupiter") which is non-generic (may box value types etc.) and works even for multi-dimensional arrays. And since .NET 2.0 we have the more … diabetic shoes for young women

How to Find Index of Specific Element in Array in C# - TutorialKart

c# - Find index of item in a multidimensional array - Stack Overflow

Web2 days ago · So, I'm learning all about arrays in c#, (coding in VSC), and whenever I initialise an array with more than 2 elements, I get an 'Unexpected Exception'. Apart from this, my antivirus (Kaspersky) also deletes my .dll file (Giraffe.dll). However, when I initialise an array with only 1 or 2 elements, it works perfectly fine. WebFind index of a value in an array (8 answers) Closed 6 years ago. I want to get index in array which contains my value in C#. For example, my array is: byte [] primes = {2, 3, 5, 7, 11, 13}; I will get index of value 11 for this example. The array type is Byte. c# arrays Share Improve this question Follow edited Feb 9, 2015 at 22:43 Johnny Bones cinema editing work station schoonmakerWebDec 27, 2010 · If you're trying to find some key which corresponds to a particular value, you could use: var key = dictionary.Where (pair => pair.Value == desiredValue) .Select (pair => pair.Key) .FirstOrDefault (); key will be null if the entry doesn't exist. diabetic shoes for women sale

"" - C# find array index by value

C# find array index by value

C# find highest array value and index - Stack Overflow

WebMar 22, 2014 · int nearestIndex = array .Select ( (x, i) => new { Diff = Math.Abs (x - TargetNumber), Index = i }) .Aggregate ( (x, y) => x.Diff < y.Diff ? x : y) .Index; This only doesn't require any ordering, and it only iterates through the array once. WebTo find index of first occurrence of a specific element in given array in C#, call Array.IndexIf () method and pass the array and the element to search in this array as arguments. Example In the following example, we take an array of strings arr, and find the index of first occurrence of element 'cherry' in this array. Program.cs

Did you know?

WebDec 3, 2013 · If you remove the .ToList() in the first method, your function will be lazy. This means if you ran indexes.Take(2), the function can stop executing once two indexes have been found, rather than finding ALL indexes first, … WebNov 30, 2024 · Write a console app in C# to find an index i in an array that is the maximum number in the array. If the maximum element in the array occurs several times, you need to display the minimum index. If the array is empty, output -1.

WebThe child array in each object (MyObjects._aSingleAssignment.NamesIDs) is shaped like this; Index, _ itemID, _name I didn’t build this thing, so excuse the insanity, but the parent array has Item ID and Price, the sub-array has a list of ALL Item IDs and Names in the system… For any given ID (parent array), how do I get its Name (sub-array)? WebMar 4, 2024 · using System; namespace ConsoleApp2 { class Program { static void Main () { byte [] data = { 5, 4, 3, 2, 1 }; Console.WriteLine (Array.IndexOf (data, (byte)2)); Console.ReadLine (); } } } Share Improve this answer Follow edited Mar 4, 2024 at 8:25 answered Mar 4, 2024 at 7:07 Thomas Weller 53.9k 20 122 215

WebSearches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the first occurrence within the … WebApr 17, 2024 · 1 Typically you can acces value from array like this var value = Array1 [0]; If you want to get value by index from Array2 you need to do it like this, but i don't know why you should to this, it can cause easily exception by everflow. for (int i = 0; i < Array2.lenght; i++) { var value = Array1 [i]; } Share Improve this answer Follow

WebApr 10, 2024 · I am developing game backend for unity. I used PHP backend server for it. so I get the string from PHP backend like this string. ["Swww","Sdss"][0,0] I am gonna change to array...

WebApr 25, 2012 · the variable array is actually a reference, because int [] is a reference type. So array is a reference that is passed by value. Thus, modifications made to array inside the function are actually applied to the int [] object to which array refers. And so those modifications are visible to all references that refer to that same object. diabetic shoes for women mary janeWebSep 30, 2024 · Print the nearest element, and its index from the given array. Example 1: To find the nearest element to the specified value 85. We subtract the given value from each element of the array and store the absolute value in a different array. The minimum absolute difference will correspond to the nearest value to the given number. diabetic shoes fresnoWebJan 24, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. cinema elizabeth city ncWebFeb 23, 2016 · @miket2e: Patko's answer is the general one - the Range approach doesn't work well with non-list sequences; so it's hard to make a "fair" comparison. For arrays, I would think the Range approach would be faster - there's probably less heap allocation, it's possibly more cache-friendly etc. (notice the weasel words). Don't believe me though, … diabetic shoes frankford ave philadelphiaWebJun 11, 2024 · Use the overload of Select which takes an index in the predicate, so you transform your list into an (index, value) pair: var pair = myList.Select ( (Value, Index) => new { Value, Index }) .Single (p => p.Value.Prop == oProp); Then: Console.WriteLine ("Index: {0}; Value: {1}", pair.Index, pair.Value); diabetic shoes government contractsWebJun 8, 2024 · Code4IT - a blog for dotnet developers. As you can see, actually using LINQ is slower than using a simple index.While in .NET Core 3 the results were quite similar, with .NET 5 there was a huge improvement both cases, but now using a simple index is two times faster than using LINQ. diabetic shoes gainesville flWebDec 7, 2012 · You could save one iteration by initializing maxVal to the array value at index 0 (assuming the array is at least length 1), index to 0, and starting the for loop at i = 1. – Jon Schneider Dec 6, 2024 at 14:57 Add a comment 34 A succinct one-liner: var (number, index) = anArray.Select ( (n, i) => (n, i)).Max (); Test case: cinema employee award