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let alert = UIAlertController(title: "Alert Title", message: "Alert Message", preferredStyle: UIAlertControllerStyle.alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
            switch action.style{
            case .default:
                print("default")
            case .cancel:
                print("cancel")
            case .destructive:
                print("destructive")
            }}))

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/*   Arduino IOT - Temperature (oC) and Humidity (%) on the web
  *Use the DHT-22 sensor to read temperature and humidity values
  *Send these values to www.thingSpeak.com with the ESP8266 serial Wifi module
  Dev: Michalis Vasilakis // Date:23/2/2016 // Update: 25/2/2015 // Ver. 1.3
  More info: http://www.ardumotive.com/iot-wifi-temp-and-humidity.html
  Tip: open the serial monitor for debugging                    */

//Libraires
#include <stdlib.h>
#include <DHT.h>

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\curl -sSL https://get.rvm.io | bash -s stable –ruby 
rvm install 2.4.2 
rvm use 2.4.2
gem install sinatra

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Local SSL websites on macOS High Sierra

These instructions will guide you through the process of setting up local, trusted websites on your own computer.

These instructions are intended to be used on macOS Sierra, but they have been known to work in El Capitan, Yosemite, Mavericks, and Mountain Lion.

NOTE: You may substitute the edit command for nano, vim, or whatever the editor of your choice is. Personally, I forward the edit command to Sublime Text:

alias edit="/Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl"

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-(void)showPulsingAnimation {
    CABasicAnimation *theAnimation;
    theAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    theAnimation.duration = 2.0;
    theAnimation.repeatCount = HUGE_VALF;
    theAnimation.autoreverses = YES;
    theAnimation.fromValue = [NSNumber numberWithFloat:1.0];
    theAnimation.toValue = [NSNumber numberWithFloat:0.0];
    [self.pulsingView.layer addAnimation:theAnimation forKey:@"animateOpacity"];
}

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>com.folderbackup.job</string>
	<key>ProgramArguments</key>
	<array>
		<string>sh</string>
		<string>-c</string>

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- (NSData *)generateHMACwith:(NSData *)key key:(NSData *)data {
    NSMutableData *macOut = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH];
    CCHmac( kCCHmacAlgSHA256,
           key.bytes,
           key.length,
           data.bytes,
           data.length,
           macOut.mutableBytes);
    return macOut;
}

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-(NSString*)generateHMACwith :(NSString* )key :(NSString*)data{
    const char *cKey  = [key cStringUsingEncoding:NSUTF8StringEncoding];
    const char *cData = [data cStringUsingEncoding:NSUTF8StringEncoding];
    unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH];
    CCHmac(kCCHmacAlgSHA256,
           cKey,
           strlen(cKey),
           cData,
           strlen(cData),
           cHMAC);

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- (NSString*)readString{
    NSURL *filePath = [[NSBundle mainBundle] URLForResource:@"info" withExtension:@"txt"];
    NSString *path = [filePath path];
    NSString *content = @"";
    if([[NSFileManager defaultManager] fileExistsAtPath:path]) {
        // Do something here
        content = [NSString stringWithContentsOfFile:path
                                                      encoding:NSUTF8StringEncoding
                                                         error:NULL];
    }

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NSLog(@"%s",__PRETTY_FUNCTION__);