Array.FindIndex<T> Method (T, Int32, Predicate<T>)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
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.
Assembly: mscorlib (in mscorlib.dll)
The type of the elements of the array.
The one-dimensional, zero-based Array to search.
- Type: System.Int32
The zero-based starting index of the search.
Return ValueType: System.Int32
The zero-based index of the first occurrence of an element that matches the conditions defined by match, if found; otherwise, –1.
The Array is searched forward starting at startIndex and ending at the last element.
The Predicate<T> is a delegate to a method that returns true if the object passed to it matches the conditions defined in the delegate. The elements of array are individually passed to the Predicate<T>.
This method is an O(n) operation, where n is the number of elements from startIndex to the end of array.