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Articles on Trending Technologies
Technical articles with clear explanations and examples
Interfacing a simple keyboard with 8085 Microprocessor
A keyboard is a very common input device. We assume that there are only eight keys for the simple keyboard. Whenever a key is pressed on this keyboard by the user, the microprocessor immediately identifies which key is pressed. The action which is to be performed by the processor depends on that particular key that gets pressed. An example to be cited as on a particular keyboard for calculator the addition operation gets performed when we press the ‘+’ key. Moreover, a microprocessor does not get directly communicated by the input device it is done via the input port. The ...
Read MoreHow to get particular id records using regexp in Android sqlite?
Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to access this database, you don't need to establish any kind of connections for it like JDBC, ODBC etc.This example demonstrate about How to get particular id records using regexp in Android sqliteStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all ...
Read MoreHow to enable Web view session storage in android?
This example demonstrate about How to enable Web view session storage in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken web view to show tutorialspoint.com.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.app.ProgressDialog; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.webkit.WebChromeClient; import android.webkit.WebSettings; import android.webkit.WebView; import android.widget.EditText; public class MainActivity extends AppCompatActivity { @RequiresApi(api ...
Read MoreHow to disable wifi in android?
This example demonstrate about How to disable wifi in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken a text view to disable wifi.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.net.wifi.WifiManager; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.TextView; public class MainActivity extends AppCompatActivity { TextView textView; @RequiresApi(api = Build.VERSION_CODES.N) @Override ...
Read MoreHow to use remainingCapacity() in android PriorityBlockingQueue?
Before getting into the example, we should know what PriorityBlockingQueue is. It is an unbounded queue and follows the same order as a priority queue. The main usage of priority blocking queue is, it going to handle out of memory error.This example demonstrates about How to use remainingCapacity() in android PriorityBlockingQueueStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken a text view to show PriorityBlockingQueue ...
Read Morelrint() and llrint() in C++
In this section we will see the lrint() and llring() in C++. At first let us discuss about the lrint().The lrint() function is used to round the fractional given value in the argument to an integral value using current rounding mode. The current mode is determined by using fesetround().>=This lrint() function takes the double or float or integer value as input parameter, and returns the long int value by rounding the fractional part into an integral part.Example#include #include #include using namespace std; main() { int x = 40; long int res; fesetround(FE_DOWNWARD); // setting ...
Read MoreHow to implementing START_STICKY for a service?
Before getting into an example, we should know what service is in android. Service is going to do back ground operation without interacting with UI and it works even after activity destroy.START_STICKY - If service is started with START_STICKY return type, it going to work in back ground even if activity is not foreground if android forcefully closed service due to memory problem or some other cases, it will restart service without interaction of the user.This example demonstrates How to implementing START_STICKY for a service.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and ...
Read MoreGet the returned record set order in MySQL IN clause?
For returned record set order, you need to use FIND_IN_SET() function. For an example, let us create a table.mysql> create table returnRecordSetOrderDemo -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (1.01 sec)Insert some records in the table using insert command.The query is as follows.mysql> insert into returnRecordSetOrderDemo values(100, 'John'); Query OK, 1 row affected (0.13 sec) mysql> insert into returnRecordSetOrderDemo values(130, 'Carol'); Query OK, 1 row affected (0.13 sec) mysql> insert into returnRecordSetOrderDemo values(103, 'Bob'); Query OK, 1 row affected (0.17 sec) mysql> insert into returnRecordSetOrderDemo values(134, 'Sam'); Query OK, ...
Read MoreHow to use remove() in android ConcurrentLinkedQueue?
Before getting into an example, we should know what ConcurrentLinkedQueue is, it is an unbounded queue based on linked nodes. Multiple threads can access queue elements with safety. Elements travel based on queue strategy as FIFO and elements going to insert from a tail. It does not allow null values.This example demonstrates about How to use remove() in android ConcurrentLinkedQueueStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, ...
Read MoreUsing return value of cin to take unknown number of inputs in C++
Sometimes we need variable number of inputs in our program. In this program we will see how to use cin to take variable number of inputs.The simple solution is run a loop, and when one specific value is pressed, it stops. The another idea is using the cin >> input. This will return false when value is non-numeric.Example#include using namespace std; main() { int input; int n = 0; cout > input) n++; cout
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