nspragmatic

> "Avaliable (sic) in Ruby and Perl, but supports all languages!"

        return 0;  // <stdlib.h> not #imported
    }

> All I want to point out is that there is no way for anyone here on HN to know what it was for sure

Take another look at the last sentence. :P

    NSString *pattern = @"\\d", *string = @"੧";
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern
                                                                           options:NSRegularExpressionCaseInsensitive
                                                                             error:nil];

    NSUInteger numMatches = [regex numberOfMatchesInString:string
                                                   options:0
                                                     range:NSMakeRange(0, [string length])];

    numMatches ? NSLog(@"%@ found by %@", string, pattern) : NSLog(@"%@ not found", string);

    // 2013-05-20 09:38:42.650 Regexperiment[17848:c07] ੧ found by \d

FTFY :)

This is the HIG quote from above:

> "In general, quit when users close the last open window in your app. [...] If users close the last remaining document window in a document-based app and switch to another app, it’s appropriate to quit the app" (emphasis added).

In TextEdit, close the last document and then _switch to another app_. You're missing the last step.