NSUserDefaults+ParameterlessOptions.m

// Enable parameterless options (e.g., `-verbose`) to be passed in as command line arguments.
NSMutableDictionary *arguments = [[NSUserDefaults.standardUserDefaults volatileDomainForName:NSArgumentDomain] mutableCopy];
for(NSString *arg in NSProcessInfo.processInfo.arguments)
    if([arg hasPrefix:@"-"] && [arguments objectForKey:[arg substringFromIndex:1]] == nil)
        [arguments setObject:@YES forKey:[arg substringFromIndex:1]];
[NSUserDefaults.standardUserDefaults removeVolatileDomainForName:NSArgumentDomain]; // remove to prevent NSInvalidArgumentException (per documentation)
[NSUserDefaults.standardUserDefaults setVolatileDomain:arguments forName:NSArgumentDomain];