# completions(forPartialWordRange:indexOfSelectedItem:) Returns an array of potential completions, in the order to be presented, representing possible word completions available from a partial word. ``` func completions(forPartialWordRange charRange: NSRange, indexOfSelectedItem index: UnsafeMutablePointer) -> [String]? ``` ## Parameters `charRange` The range of characters of the matched partial word to be completed. `index` On return, optionally set to the completion that should be initially selected. The default is 0, and –1 indicates no selection. ## Return Value An array of potential completions, in the order to be presented, representing possible word completions available from a partial word at `charRange`. Returning `nil` or a zero-length array suppresses completion. ## Discussion May be overridden by subclasses to modify or override the list of possible completions. This method should call the delegate method [`textView(_:completions:forPartialWordRange:indexOfSelectedItem:)`](/documentation/AppKit/NSTextViewDelegate/textView(_:completions:forPartialWordRange:indexOfSelectedItem:)) if the delegate implements such a method. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)