02.03.2013

Android

Row , synthetic sensors

SensorManager   class

Sensor class

public boolean isAccelerometerSupported(Context context)
{
SensorManager sm = (SensorManager) context
      .getSystemService(Context.SENSOR_SERVICE);
List<Sensor> sensors = sm.getSensorList(Sensor.TYPE_ACCELEROMETER);
return sensors.size() > 0;
}

SensorEvent.timestamp 

Sensor.getMinDelay ()

Sensor.getMaximumRange ()

Sensor.getResulotion ()

SensorEventListener 

Java SE

java 8 lambdas

List<Int>  theList =  Arrays.asList(1,2,3,4,16)
                              .stream()
                              .map(s -> "Hello " + s)
                              .collect(Collectors.toList());

SoccerService soccerService = (teamA, teamB) -> {
    SoccerResult result = null;
    if (teamA == teamB) {
        result = SoccerResult.DRAW;
    }
    else if(teamA < teamB) {
        result = SoccerResult.LOST;
    }
    else {
        result = SoccerResult.WON;
    }

    return result;
};

Ruby 

sub and gsub (Replace all )

myStr = “test test”

myStr2 = myStr.sub (/te/ , “*”)

puts “#{mystr2}”

class Regexp

Regexp.new (“mm/dd”)

%{mm/dd}

=~ positive match 

!~ negative match 

Groovy

assert

class Book {

String titie

}

def gb = new Book ()

gb.SetTitle (“Mazal sadon”)

gb.Title = “my life”

Linux

struct cdev *my_cdex = cdev_alloc ();

cdev_add

cdev_del

The user-level library glibc.so has an implementation of the threads.

light-weight processes – representation of the user space thread in kernel space

 Each user-thread has a 1×1 mapping to an LWP

for each process its light weight process share the same group id allowing resource sharing

#include <sched.h>
int clone (int (*fn) (void *), void *child_stack, int flags, void *arg);