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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.
9 kwi 2019 · Its pretty simple. I always use this code to search string from a string array. string[] stringArray = { "text1", "text2", "text3", "text4" }; string value = "text3"; int pos = Array.IndexOf(stringArray, value); if (pos > -1) { return true; } else { return false; }
14 lis 2023 · Ranges and indices provide a succinct syntax for accessing single elements or ranges in a sequence. 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.
IndexOf (Array, Object) Searches for the specified object and returns the index of its first occurrence in a one-dimensional array. IndexOf (Array, Object, 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 ...
This post provides a deep dive into the LINQ functionary methods in C#, as well as a side-by-side comparison of the comparable JavaScript Array methods.
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 starts at the specified index and contains the specified number of elements.
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; }
