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You can use $literal operator along with aggregate framework. Let us first create a collection with documents −> db.fieldWithStaticValue.insertOne({"Name":"Larry", "Age":24}); { "acknowledged" : true, "insertedId" : ObjectId("5cd6554c7924bb85b3f48948") } > db.fieldWithStaticValue.insertOne({"Name":"Chris", "Age":23}); { "acknowledged" : true, "insertedId" : ObjectId("5cd655567924bb85b3f48949") } > db.fieldWithStaticValue.insertOne({"Name":"David", "Age":26}); { "acknowledged" : true, "insertedId" : ObjectId("5cd655607924bb85b3f4894a") }Following is the query to display all documents from a collection with the help of find() method −> db.fieldWithStaticValue.find();This will produce the following output −{ "_id" : ObjectId("5cd6554c7924bb85b3f48948"), "Name" : "Larry", "Age" : 24 } { "_id" : ObjectId("5cd655567924bb85b3f48949"), "Name" : "Chris", "Age" : 23 ... Read More
The C library function char *ctime(const time_t *timer) returns a string representing the localtime based on the argument timer.The returned string has the following format − Www Mmm dd hh:mm:ss yyyy, where Www is the weekday, Mmm the month in letters, dd the day of the month, hh:mm:ss the time, and yyyy the year.The syntax is like below −char *ctime(const time_t *timer)This function takes the pointer to a time_t, which is containing the calendar time. It returns a string containing date, time info in human readable format.Example Live Demo#include #include int main () { time_t curtime; time(&curtime); ... Read More
Enumeration (enum) in Java is a datatype which stores a set of constant values. You can use enumerations to store fixed values such as days in a week, months in a year etc.enum Days { SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY }You can also define an enumeration with custom values to the constants declared. But you need to have an instance variable, a constructor and getter method to return values.Enum with switch caseLet us create an enum with 5 constants representing models of 5 different scoters with their prices as values, as shown below −enum Scoters { ... Read More
The HTML DOM input FileUpload form property returns the reference of the form which enclose the file upload input button.SyntaxFollowing is the syntax −object.formExampleLet us see an example of input FileUpload form property − Live Demo body{ text-align:center; background-color:#363946; color:#fff; } form{ margin:2.5rem auto; } button{ background-color:#db133a; border:none; cursor:pointer; padding:8px 16px; color:#fff; border-radius:5px; font-size:1.05rem; } .show{ ... Read More
The HTML DOM Input Email readOnly property sets/returns whether Input Email can be modified or not.SyntaxFollowing is the syntax −Returning boolean value - true/falseinputEmailObject.readOnlySetting readOnlyto booleanValueinputEmailObject.readOnly = booleanValueBoolean ValuesHere, “booleanValue” can be the following −booleanValueDetailstrueIt defines that the input email field is readOnly.falseIt defines that the input email field is not readOnly and can be modified.ExampleLet us see an example of Input Email readOnly property − Live Demo Input Email readOnly form { width:70%; margin: 0 auto; text-align: center; } * { padding: ... Read More
Given with an array of elements and the task is to print those numbers whose digit sum is also prime and return -1 is not such digit exists in an arrayInput: arr[]={2, 4, 3, 19, 25, 6, 11, 12, 18, 7} Output : 2, 3, 25, 11, 12, 7Here, the given output is generated as it contains those additive numbers whose sum is also prime like − 2, 3, 7 are prime but 25(2+5=7), 11(1+1=2), 12(1+2=3) are also prime whereas numbers like 19(1+9=10) are not prime.AlgorithmSTART Step 1 -> Take array of int with values Step 2 -> declare start ... Read More
Declare and initialize an Integer array:Integer[] arr = {50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000};Now, create a stream with the above elements:Stream stream = Arrays.stream(arr);To convert the above stream to list, use Collectors.toList():stream.collect(Collectors.toList()The following is an example to convert Stream to List:Exampleimport java.util.Arrays; import java.util.stream.Collectors; import java.util.stream.Stream; public class Demo { public static void main(String[] args) { Integer[] arr = {50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000}; Stream stream = Arrays.stream(arr); System.out.println("Stream = "+stream.collect(Collectors.toList())); } }OutputStream = [50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000]
In this program we will see how to subtract the contents of two different arrays.Problem StatementWrite 8086 Assembly language program to subtract the contents to corresponding elements which are stored in two different arraysDiscussionIn this example there are two different arrays. The arrays are stored at location 501 onwards and 601 onwards. The size of these two arrays are stored at offset location 500. We are taking the array size to initialize the counter, then by using loops we are subtracting the elements one by oneInputAddressData……5000450109502035030850406……60104602016030260403……Flow DiagramProgram MOV SI, 500 ;Point Source index to 500 MOV CL, [SI] ;Load the ... Read More
You need to find the document and after that you need to use update to toggle query. Let us first create a collection with documents −> db.toggleDemo.insertOne({"CustomerName":"John Smith", "CustomerAge":28, "isMarried":true}); { "acknowledged" : true, "insertedId" : ObjectId("5cc7be138f9e6ff3eb0ce43b") } > db.toggleDemo.insertOne({"CustomerName":"David Miller", "CustomerAge":25, "isMarried":false}); { "acknowledged" : true, "insertedId" : ObjectId("5cc7be2e8f9e6ff3eb0ce43c") }Following is the query to display all documents from a collection with the help of find() method −> db.toggleDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cc7be138f9e6ff3eb0ce43b"), "CustomerName" : "John Smith", "CustomerAge" : 28, "isMarried" : true } { "_id" : ObjectId("5cc7be2e8f9e6ff3eb0ce43c"), "CustomerName" : "David Miller", "CustomerAge" : 25, ... Read More
To get the node at a specified index in a JTree, use the getChildAt() method. Here, we are finding the node at index 3 i.e. 4th node −node.getChildAt(3)The following is an example to get the node at a specified index in a JTree −Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Products"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Clothing (Product1 - P66778)"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Accessories (Product2 ... Read More