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15 paź 2013 · For arrays you can use: Array.FindIndex<T>: int keyIndex = Array.FindIndex(words, w => w.IsKey); For lists you can use List<T>.FindIndex: int keyIndex = words.FindIndex(w => w.IsKey); You can also write a generic extension method that works for any Enumerable<T>: ///<summary>Finds the index of the first item matching an expression in an enumerable.
14 lis 2023 · In this tutorial, you'll learn how to: Use the syntax for ranges in a sequence. Implicitly define a Range. Understand the design decisions for the start and end of each sequence. Learn scenarios for the Indexand Rangetypes. Language support for indices and ranges.
The range extends from a specified index for a specified number of elements. IndexOf<T> (T [], T, Int32) Searches for the specified object in a range of elements of a one dimensional array, and returns the index of its first occurrence. The range extends from a specified index to the end of the array.
Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the first occurrence within the range of elements in the Array that extends from the specified index to the last element.
27 sty 2023 · Now, let’s use the IndexOf() method of the Array class to check for a value in a string array and return its index: public int ArrayIndexOf() { string value = "lizard"; int index = Array.IndexOf(_stringArray, value); return index; }
21 gru 2019 · C# 8 introduced the ability to access subsets of collections with range operators. Frequently, ranges are used to access arrays or spans, but they can also be used to access the characters inside a string. This can be especially useful if you know there are fixed length portions of text within the string you are manipulating.
20 cze 2023 · Searching: Methods like Array.IndexOf() and Array.LastIndexOf() allow you to find the index of a specific element in the array. Copying: The Array.Copy() method allows you to create a copy of a string array or a portion of it.
