Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
An iterator is used in Java to iterate through the values of LinkedHashMap.Let us first create LinkedHashMap −LinkedHashMap l = new LinkedHashMap();Add some elements to the LinkedHashMap −l.put("1", "Jack"); l.put("2", "Tom"); l.put("3", "Jimmy"); l.put("4", "Morgan"); l.put("5", "Tim"); l.put("6", "Brad");Iterate through the values −Collection res = l.values(); Iterator i = res.iterator(); while (i.hasNext()){ System.out.println(i.next()); }The following is an example to iterate through the values of LinkedHashMap −Example Live Demoimport java.util.*; public class Demo { public static void main(String[] args) { LinkedHashMap l = new LinkedHashMap(); l.put("1", "Jack"); l.put("2", "Tom"); ... Read More
The importlib package provides the implementation of the import statement in Python source code portable to any Python interpreter. This also provides an implementation which is easier to comprehend than one implemented in a programming language other than Python.This package also exposes components to implement import, making it easier for users to create their own custom objects (known as an importer) to participate in the import process.The importlib package has an important function named as import_module()import_module():This function imports a module programmatically. Name of module is first parameter to the function. Optional second parameter specifies package name if any.invalidate_caches():This function invalidates ... Read More
To round down to nearest integer, use FLOOR() function from MySQL. The syntax is as follows −SELECT FLOOR(yourColumnName) from yourTableName;Let us first create a table −mysql> create table FloorDemo -> ( -> Price float -> ); Query OK, 0 rows affected (0.57 sec)Insert records to column Price. The query to insert records is as follows −mysql> insert into FloorDemo values(5.75); Query OK, 1 row affected (0.21 sec) mysql> insert into FloorDemo values(5.23); Query OK, 1 row affected (0.31 sec) mysql> insert into FloorDemo values(5.50); Query OK, 1 row affected (0.12 sec)Display ... Read More
To check whether a HashSet is empty or not, use the isEmpty() method.Create a HashSet −HashSet hs = new HashSet();Add elements to the HashSet −hs.add("B"); hs.add("A"); hs.add("D"); hs.add("E"); hs.add("C"); hs.add("F"); hs.add("K"); hs.add("M"); hs.add("N");Now, check whether the HashSet is empty or not. Since we added elements above, it won’t be empty −hs.isEmpty();The following is an example that checks whether a HashSet is empty or not −Example Live Demoimport java.util.*; public class Demo { public static void main(String args[]) { // create a hash set HashSet hs = ... Read More
In this program we will see how to generate Fibonacci sequence.Problem StatementWrite 8085 Assembly language program to generate the first ten elements of the Fibonacci sequence using registers only and store them in memory locations 8050H to 8059H. DiscussionThis program will generate the Fibonacci numbers. The Fibonacci numbers follows this relation F(i) = F(i - 1) + F(i - 2) for all i >2 with F(1) = 0, F(2) = 1.InputIn this case we are not providing any input, this program will generate ten Fibonacci numbers.Flow DiagramProgramAddressHEX CodesLabelsMnemonicsComments800021, 50, 80STARTLXI H 8050H Pointer to the OUT-BUFFER8003AFXRA A Clear accumulator and reg. B800447MOV B, ... Read More
UItableViewController and UIViewController are two different objects of iOS UIKit framework. Both are used for different purpose.A UIViewController class manages a ViewContoller which is responsible for actions that happen within that View controller. This class is aware of actions that happen on view controller, like ViewDidLoad, ViewWillApper, ViewDidAppear, ViewWillDisapper, ViewDidDisapper.Whereas, A UITableViewController is responsible for managing a table, it's data and it's events using UITableViewDataSource, UITableViewDelegate.A UITableViewController conforms to UIViewController, UITableViewDataSource and UITableViewDelegate to implement table view.Below is an example of a class implementing UIViewController.class ViewController : UIViewController { @IBOutlet weak var sampleView: UIView! ... Read More
This example demonstrates how do I make a dotted/dashed line 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 text view with image view. Image view contains a dotted background. So create dotted.xml in drawable as shown below - Step 3 - Add the following code to src/MainActivity.javapackage com.example.andy.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import ... Read More
For random numbers in a range, you need to use the RAND() method from MySQL. The syntax is as follows for update −UPDATE yourTableName set yourColumnName=value where yourColumnName2=(SELECT FLOOR(1+RAND()*3));In the above query, the statement FLOOR(1+RAND()*3) generates the number between 1-3 and update the column.To understand the above syntax, let us first create a table. The query to create a table is as follows −mysql> create table updateRowWith1To3 -> ( -> Id int, -> Name varchar(100) -> ); Query OK, 0 rows affected (0.47 sec)Insert some records in the ... Read More
Now let us see a program of Intel 8085 Microprocessor. This program will convert 8-bit numbers to two digit ASCII values.Problem StatementWrite 8085 Assembly language program where an 8-bit binary number is stored in memory location 8050H. Separate each nibbles and convert it to corresponding ASCII code and store it to the memory location 8060H and 8061H.DiscussionIn this problem we are using a subroutine to convert one hexa-decimal digit (nibble) to its equivalent ASCII values. As the 8-bit number contains two nibbles, so we can execute this subroutine to find ASCII values of them. We can get the lower nibble ... Read More
To set the background color for a navigation bar we can either do it programmatically or through the storyboard if it is on storyboard.Method 1Let's see how to change the background color of a navigation bar through the storyboard editor.Create a new project, select it's view controller and embed in navigation controller.Select the navigation bar and go to It's attribute inspector.This is how it looks in the Xcode 10. You can select the tint color from there and it will be changed for the navigation controller.Method 2Programmatically changing the navigation background.To programmatically change it, go to the view controller and ... Read More