[ Version ( since = "2.54" ) ]
public bool find_with_equal_func (G needle, EqualFunc<G>? equal_func, out uint index = null)
Checks whether needle exists in haystack, using the given equal_func.
If the element is found, true is returned and the element’s index is returned in index_
(if non-null). Otherwise, false is returned and index_
is undefined. If needle exists multiple times in haystack, the index of the first instance is returned.
equal_func is called with the element from the array as its first parameter, and needle as its second
parameter. If equal_func is null, pointer equality is used.
| needle |
pointer to look for |
| equal_func |
the function to call for each element, which should return true when the desired element is found; or null to use pointer equality |
| haystack |
pointer array to be searched |
| index_ |
return location for the index of the element, if found |
|
true if |