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The $gt is for greater than, wherein select those documents where the value of the field is greater than the specified value. Let us first create a collection with documents −> db.performQueryDemo.insertOne({"PlayerDetails":{"PlayerScore":1000, "PlayerLevel":2}, "PlayerName":"Chris"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7eba41a844af18acdffa9") } > db.performQueryDemo.insertOne({"PlayerDetails":{"PlayerScore":0, "PlayerLevel":1}, "PlayerName":"Robert"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7ebbb1a844af18acdffaa") } > db.performQueryDemo.insertOne({"PlayerDetails":{"PlayerScore":-10, "PlayerLevel":0}, "PlayerName":"Larry"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7ebd41a844af18acdffab") } > db.performQueryDemo.insertOne({"PlayerDetails":{"PlayerScore":1, "PlayerLevel":1}, "PlayerName":"David"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7ebe31a844af18acdffac") }Following is the query to display all documents from a collection with the help of ... Read More
This is the program to find closest pair of points in an array.AlgorithmsFor Distance between Closest pointBegin Declare function Closest_dist_Spoint(poi stp[], int s, double dist, poi &pnt1, poi &pnt2) to the double datatype. Declare Minimum to the double datatype. Initialize Minimum = dist. for (int i = 0; i < s; ++i) for (int j = i+1; j < s && (stp[j].poi2 - stp[i].poi2) < Minimum; ++j) if (Distance(stp[i], stp[j]) < Minimum) then Minimum = Distance(stp[i], stp[j]). ... Read More
Whenever you inherit a superclass a copy of superclass’s members is created at the subclass and you using its object you can access the superclass members.If the superclass and the subclass have instance variable of same name, if you access it using the subclass object, the instance variables of the subclass hides the instance variables of the superclass irrespective of the types. This mechanism is known as field hiding or, instance variable hiding.But, since it makes code complicated field hiding is not recommended.ExampleIn the following example we have two classes Super and Sub one extending the other. They both have ... Read More
The HTML DOM Input Checkbox Object represents an input HTML element with type checkbox.SyntaxFollowing is the syntax −Creating an with type checkboxvar checkboxObject = document.createElement(“input”); checkboxObject.type = “checkbox”;AttributesHere, “checkboxObject” can have the following attributes −AttributesDescriptionautofocusIt defines if the checkbox should be focused on initial page load.checkedIt defines the state of checkbox i.e. checked/unchecked.defaultCheckedIt returns the default value of checked attribute i.e. true/falsedefaultValueIt sets/returns the default value of checkboxdisabledIt defines if checkbox is disabled/enabledformIt returns a reference of enclosing form that contains the checkboxindeterminateIt sets/returns indeterminate state of checkboxnameIt defines the value of name attribute of a checkboxrequiredIt defines if ... Read More
The HTML DOM Input FileUpload autofocus property sets/returns whether Input FileUpload is focused upon initial page load.SyntaxFollowing is the syntax −Returning boolean value - true/falseinputFileUploadObject.autofocusSetting autofocus to booleanValueinputFileUploadObject.autofocus = booleanValueBoolean ValuesHere, “booleanValue” can be the following −booleanValueDetailstrueIt defines that input will be autofocused on page load.falseIt is the default value and input is not autofocused.ExampleLet us see an example of Input FileUpload autofocus property − Live Demo Input FileUpload autofocus form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; ... Read More
Following is our integer array:Integer[] arr = {20, 50, 100, 150, 200, 250, 300, 350, 400, 500};Now convert the above Integer array to List:List list = new ArrayList(Arrays.asList(arr));Now, to sort the above Integer list in reversed order:Comparator initialComp = Integer::compare; Comparator revComp = initialComp.reversed(); Collections.sort(list, revComp);The following is an example to sort Integer list in reversed order:Exampleimport java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.List; public class Demo { public static void main(String[] args) { Integer[] arr = {20, 50, 100, 150, 200, 250, 300, 350, 400, 500}; List list = new ... Read More
In C++, there is no direct way to check the environment architecture. There are two Macros for Windows systems, that can be used to check the architecture. These macros are _WIN64, and _WIN32. When the system is 64-bit, then the _WIN64 will be 1, otherwise the _WIN32 will be 1. So using macro checking, we can identify the architectureExample#include using namespace std; int main() { #ifdef _WIN64 cout
This example demonstrate about How to get notified when a notification is notifiedStep 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. Step 3 − Add the following code to src/MainActivity.package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; public class MainActivity extends AppCompatActivity { public static final String NOTIFICATION_CHANNEL_ID = "10001" ; private final static String default_notification_channel_id = ... Read More
You can use dot(.) notation to find the document from sub array. Let us first create a collection with documents −> db.findDocumentDemo.insertOne( ... { ... "EmployeeDetails" : ... { ... "EmployeeAppraisalTime": ... ... [ ... ... {"EmployeeDesignation": "Developer", "Salary": 45000}, ... {"EmployeeDesignation": "Tester", "Salary": 30000}, ... {"EmployeeDesignation": "HR", "Salary": 22000}, ... {"EmployeeDesignation": "Accountant", "Salary": 18000} ... ] ... Read More
To display a title to the JTable, you can set a title for the JPanel, which already consists of a JTable.Here, we are using createTitledBorder() for the JPanel to set the title for the panel border that would eventually work for table title.Let’s say the following is the JPanel −JPanel panel = new JPanel();Now, use setBorder() and the BorderFactory class to set a title border for the panel that would be our table title as well −panel.setBorder(BorderFactory.createTitledBorder( BorderFactory.createEtchedBorder(), "My Demo Table", TitledBorder.LEFT, TitledBorder.TOP));The following is an example to add a title to a JTable −Examplepackage my; import javax.swing.BorderFactory; import ... Read More