enumerate(options:using:)

Executes a given Block over the index set’s indexes, using the specified enumeration options.

Declaration

func enumerate(options opts: NSEnumerationOptions = [], using block: (Int, UnsafeMutablePointer<ObjCBool>) -> Void)

opts:
A bitmask that specifies the options for the enumeration (whether it should be performed concurrently and whether it should be performed in reverse order). See Nsenumerationoptions for the supported values.
block:
The Block to apply to elements in the set.
The Block takes two arguments:
idx
The index of the object.
stop
A reference to a Boolean value. The block can set the value to True to stop further processing of the set. The stop argument is an out-only argument. You should only ever set this Boolean to YES within the Block.

This method executes synchronously.