List<t>. FindIndex Method (predicate<t>)

Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the first matching element in the entire list<T> .

namespaces: System.Collections.Generic
Assembly: mscorlib (in mscorlib.dll)

Grammar

public int findindex (predicate<t> match)

Parameters

Match

Type: system.predicate<t>

predicate<T> delegate that defines the condition of the element to search for.

return value type:System.Int32

The zero-based index of the element if the first element that matches the criteria defined by the match is found; otherwise-1.

The t is actually the _itemlist passed over the parameters, this function is actually again do the traversal, but the predicate of judgment, directly with an anonymous function instead of;

int index = _itemlist.findindex (t=>t==sender. Getcomponent<basepartneritem> ());

Can also be written like this

int index = _itemlist.findindex (Isbasepartneritem);

private bool Isbasepartneritem (Basepartneritem BPI)

{

if (BPI = = ==sender. Getcomponent<basepartneritem> ())

return true;

Else

return false;

}

List<t>. FindIndex Method (predicate<t>)