mattrobmattrob

#!/bin/bash
FILES=~/Path/To/Folder/With/Files
for f in $FILES
do
  echo "Processing $f file..."
  # take action on each file. $f stores current file name.
  ed -s $f <<< w
done

mattrobmattrob

Links

• http://useyourloaf.com/blog/slow-app-startup-times/
  • Add DYLD_PRINT_STATISTICS to print out pre-main load time
• http://stackoverflow.com/questions/31080284/adding-several-pods-increases-ios-app-launch-time-by-10-seconds
• artsy/eigen#586
• https://engineering.tumblr.com/post/144507330193/peeking-into-a-black-box-the-effect-of
  • "This is an issue in production, but is even more critical for our internal enterprise builds, which can take so long to launch that the OS terminates them."
  • "Because the numbers do not bear this out, we conclude that the structure of the dependency graph does not affect launch time."
• https://twitter.com/sozorogami/status/792421991592648705

mattrobmattrob

/// After using `requestAuthorizationToShareTypes:readTypes:completion:`
- (BOOL)hasRequestedHeartRateAuthorization
{
    return (HKAuthorizationStatusNotDetermined != [HKHealthStore authorizationStatusForType:[HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierHeartRate]]);
}

- (void)requestHeartRateAuthorizationWithCompletion:(void (^)(BOOL succes, NSError *error))completion
{
    NSSet *readTypes = [NSSet setWithObject:[HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierHeartRate]];
    [self.store requestAuthorizationToShareTypes:nil readTypes:readTypes completion:^(BOOL success, NSError *error){

mattrobmattrob

- (void)hasMotionAndFitnessAuthorizationWithCompletion:(void (^)(BOOL authorized, NSError * _Nullable error))completion
{
    __weak typeof(self) weakSelf = self;

    // request samples within the past week. we want to be relatively sure that we'll get a quick response from this query since it can
    // block the critical path. if we were to request updates starting now, the user would have to walk around enough to trigger an update before
    // the completion block would be executed.
    NSDate *lastWeekDate = [[NSDate date] dateByAddingTimeInterval:-1209600.0];
    [self.authorizationPedometer startPedometerUpdatesFromDate:lastWeekDate
                                                   withHandler:^(CMPedometerData * _Nullable pedometerData, NSError * _Nullable error) {

mattrobmattrob

- (void)requestWhenInUseAuthorization
{
    [CLLocationManager requestWhenInUseAuthorization];
}

+ (BOOL)locationServicesAvailable
{
    BOOL result = [CLLocationManager locationServicesEnabled] && [CLLocationManager authorizationStatus] >= kCLAuthorizationStatusAuthorizedAlways;
    return result;
}

mattrobmattrob

__block BOOL areNotificationsAuthorized = NO;
[UNUserNotificationCenter  getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
    areNotificationsAuthorized = UNAuthorizationStatusAuthorized == settings.authorizationStatus;
}];

mattrobmattrob

/// Generate `SCNMaterial` that is the specified color
func material(withColor color : UIColor) -> SCNMaterial {
    let material = SCNMaterial();
    material.diffuse.contents = color
    material.locksAmbientWithDiffuse = true
    return material
}

let greenMaterial = material(withColor: UIColor.green)
let redMaterial = material(withColor: UIColor.red)

mattrobmattrob

final class BubbleView: UIView {
    override func draw(_ rect: CGRect) { ... }
}

mattrobmattrob

extension BubbleView {
    func drawBubble(in bubbleBounds: CGRect, bubbleColor: UIColor) {
        // 1.
        guard let context = UIGraphicsGetCurrentContext() else { return }
        // 2.
        context.setFillColor(bubbleColor.cgColor)
        // 3.
        context.fillEllipse(in: bounds)
    }
}

mattrobmattrob

extension BubbleView {
    /// Draws a set of stripes across the view up from bottom left
    /// to top right at a 45 degree angle. The stripes will be
    /// `stripeWidth` wide and have `stripeWidth` between them.
    func drawStripes(in bubbleBounds: CGRect,
                     stripeColor: UIColor,
                     stripeWidth: CGFloat) {...}
}

final class BubbleView: UIView {