Tag Archives: example

Use yield in Ruby

yield function is one of the good stuff in the Ruby that gives different kind of code reuse logic to your code. It just like lambda in Scheme and Lips. when yield is called in a function it cuts the execution of its container function and pass the execution time to the do-end block then when the execution ends with the end keyword, it continues the execution from the last point.

Here is an example code that uses yield function.

def around_staff
  eren = 20
  puts "first step"
  yield(eren)
  puts "last step"
end

def do_something
  around_staff do |eren|
    puts "I did something around"+ eren.to_s
  end
end

do_something
Share

IPC (Interprocess Communication) implementation example.

This example code illustrates the basic implementation of IPC mechanism that is provided by POSIX API.


#include
#include shm.h>
>#include stat.h>
>
int main(int argc, char **argv)
{
int segment_id;
char *shared_mem;
const int size = 5096; // in bytes

//create shared mem.
segment_id = shmget(IPC_PRIVATE, size, S_IRUSR|S_IWUSR);

//attach the shared mem. to the process in Write Read mode.(0 argument)
shared_mem = (char * )shmat(segment_id, NULL, 0);

//write the data to the shared memory.
sprintf(shared_mem, "This is the shared memory example coded by Eren Golge. Regards!!");

//read the data from
printf("*%s n", shared_mem );

//detach the segment from process
shmdt(shared_mem);

//delete the shared mem. segment form memory
shmctl(segment_id, IPC_RMID, NULL);

printf("End of code");
return 0;
}

Share