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In this section we are going to create a Whatsapp chatbots, but unlike few other chatbots for twitter or facebook, whatsapp chatbots don’t run on the platform directly because of whatsapp’s policies.But there is a way to get is done, using selenium, a very smart package in python with which developer’s can automate the browser’s activity. With this we can make use of whatsapp-web through the browser.RequirementsWe need three basic things to get things done: Selenium.We can install selenium very easily using pip, just run below command on your terminal −$pip install seleniumChrome/firefox or any other webdriver.As I using chrome ... Read More
In C we have used Files. To handle files, we use the pointer of type FILE. So the FILE is a datatype. This is called the Opaque datatype. So its implementation is hidden. The definition of the FILE is system specific. This is the definition of FILE in Ubuntu System −FILE Definitionstruct _IO_FILE { int _flags; /* High-order word is _IO_MAGIC; rest is flags. */ #define _IO_file_flags _flags /* The following pointers correspond to the C++ streambuf protocol. */ /* Note: Tk uses the _IO_read_ptr and _IO_read_end fields directly. */ char* _IO_read_ptr; /* Current read ... Read More
Whenever we execute SQL statements using the executeQuery() method, it returns a ResultSet object which holds the tabular data returned by the SELECT queries (in general).The ResultSet object contains a cursor/pointer which points to the current row. Initially this cursor is positioned before first row (default position).You can move the cursor of the ResultSet object to the last row from the current position, using the last() method of the ResultSet interface.rs.last()This method returns a boolean value specifying whether the cursor has been moved to the last row successfully.If there are no rows in the current ResultSet object this method returns false, else ... Read More
Use delete operator to unset variable in MongoDB shell. Following is the syntax −delete yourVariableName;Let us now implement the above syntax in order to unset variable in MongoDB shell. First, print the variable name −> customerDetail;This will produce the following output −2019-05-08T22:29:17.361+0530 E QUERY [js] ReferenceError: customerDetail is not defined : @(shell):1:1Now you can set a value in the above variable. Following is the query −> customerDetail={"CustomerFirstName":"Chris"};This will produce the following output −{ "CustomerFirstName" : "Chris" }Following is the query to show the value of a variable −> customerDetail; This will produce the following output −{ "CustomerFirstName" : "Chris" }Following ... Read More
Use the UIManager to customize the MenuBar:JMenuBar menuBar = new JMenuBar(); UIManager.put("MenuBar.background", Color.ORANGE);We have used the following above to update the background color of the MenuBar:UIManager.put("MenuBar.background", Color.ORANGE);The following is an example to customize MenuBar and change the background color:package my; import java.awt.Color; import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.UIManager; public class SwingDemo { public static void main(final String args[]) { JFrame frame = new JFrame("MenuBar Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JMenuBar menuBar = new JMenuBar(); UIManager.put("MenuBar.background", Color.ORANGE); JMenu fileMenu = new JMenu("File"); ... Read More
Create a combo box first and set some values −JComboBox comboBox = new JComboBox(new String[]{"Product1", "Product2", "Product3", "Product4"});Seth the JComboBox for the editor so that the editor uses the combo box −TreeCellEditor editor = new DefaultCellEditor(comboBox); tree.setEditable(true); tree.setCellEditor(editor);The following is an example to create a Default Cell Editor that uses a JComboBox −Examplepackage my; import javax.swing.DefaultCellEditor; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeCellEditor; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Products"); DefaultMutableTreeNode node1 ... Read More
You can use $gt operator for this. Let us first create a collection with documents −> db.arrayElementsNotGreaterThanDemo.insertOne({"Scores":[89, 43, 32, 45]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9e9f9b50a6c6dd317adb3") } > db.arrayElementsNotGreaterThanDemo.insertOne({"Scores":[32, 33, 34, 40]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9ea13b50a6c6dd317adb4") } > db.arrayElementsNotGreaterThanDemo.insertOne({"Scores":[45, 56, 66, 69]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9ea25b50a6c6dd317adb5") } > db.arrayElementsNotGreaterThanDemo.insertOne({"Scores":[46, 66, 77, 88]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9ea3cb50a6c6dd317adb6") }Following is the query to display all documents from a collection with the help of find() method −> db.arrayElementsNotGreaterThanDemo.find().pretty();This will produce the following output −{ ... Read More
The required attribute of the element is to let users know that the drop-down is required and need to be submitted before the form is submitted. If you won’t select the value from the drop-down and try to submit the form, it won’t submit and a warning would be visible on the web page itself. The required attribute introduced in HTML5.Following is the syntax−Let us now see an example to implement the required attribute of the element−Example Live Demo Candidate Profile Following are the details to be submitted by the candidate: Educational Qualification Graduation ... Read More
Trapezium is a type of quadrilateral that has at least one pair of side parallel to each other. Area and perimeter of a trapezium can be found using the below formula, Perimeter = sum of all sidesArea = ½ x (sum of the lengths of the parallel sides) x perpendicular distance between parallel sidesCode logic − The code will use 5 variables in as all sides of trapezium and one for the perpendicular distance between the two parallel side. For the area variable calculation we will take a float variable that will be initialised with the value. To calculate it ... Read More
The HTML DOM Input Date max property returns/sets max attribute of Input date type.SyntaxFollowing is the syntax −Returning string valueinputDateObject.maxSetting max to string valueinputDateObject.max = YYYY-MM-DDString ValuesHere, “YYYY-MM-DD” can be the following −stringValueDetailsYYYYIt defines year (eg:1998)MMIt defines month (eg: 05 for May)DDIt defines Day (eg: 24)ExampleLet us see an example of Input Date max property − Live Demo Input Date Max Date Select: Change Max Date var inputDate = document.getElementById("date"); var divDisplay = document.getElementById("divDisplay"); divDisplay.textContent = 'Max of date input: '+inputDate.max; function getMaxDate() { var oldInputDate = inputDate.max; ... Read More