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The elements of a Collection can be appended at the end of the Vector using the method java.util.Vector.addAll(). This method takes a single parameter i.e. the Collection whose elements are added to the Vector and it returns true if the Vector is changed.A program that demonstrates this is given as follows −Example Live Demoimport java.util.Vector; public class Demo { public static void main(String args[]) { Vector vec1 = new Vector(); vec1.add(7); vec1.add(3); vec1.add(5); vec1.add(9); vec1.add(2); System.out.println("The Vector vec1 elements ... Read More
To push values, use $push along with update() with multi field set to TRUE. Let us create a collection with documents −> db.demo747.insertOne({"CountryName":["US", "IND"]}); { "acknowledged" : true, "insertedId" : ObjectId("5eae6a50a930c785c834e55f") } > db.demo747.insertOne({"CountryName":["UK", "US"]}); { "acknowledged" : true, "insertedId" : ObjectId("5eae6a57a930c785c834e560") } > db.demo747.insertOne({"CountryName":["UK", "IND"]}); { "acknowledged" : true, "insertedId" : ObjectId("5eae6a60a930c785c834e561") }Display all documents from a collection with the help of find() method −> db.demo747.find();This will produce the following output −{ "_id" : ObjectId("5eae6a50a930c785c834e55f"), "CountryName" : [ "US", "IND" ] } { "_id" : ObjectId("5eae6a57a930c785c834e560"), "CountryName" : [ "UK", "US" ] } ... Read More
To find posts older than current date in MongoDB, use $lte. Let us create a collection with documents −> db.demo746.insertOne({DueDate:new Date("2020-01-10")}); { "acknowledged" : true, "insertedId" : ObjectId("5eae67eca930c785c834e55b") } > db.demo746.insertOne({DueDate:new Date("2020-10-10")}); { "acknowledged" : true, "insertedId" : ObjectId("5eae67eda930c785c834e55c") } > db.demo746.insertOne({DueDate:new Date("2020-03-05")}); { "acknowledged" : true, "insertedId" : ObjectId("5eae67eea930c785c834e55d") } > db.demo746.insertOne({DueDate:new Date("2020-05-04")}); { "acknowledged" : true, "insertedId" : ObjectId("5eae67f1a930c785c834e55e") }Display all documents from a collection with the help of find() method −> db.demo746.find();This will produce the following output −{ "_id" : ObjectId("5eae67eca930c785c834e55b"), "DueDate" : ISODate("2020-01-10T00:00:00Z") } { "_id" : ObjectId("5eae67eda930c785c834e55c"), ... Read More
The method java.time.Matcher.pattern() returns the pattern that is matched upon by the Matcher. This method accepts no parameters.A program that demonstrates the method Matcher.pattern() in Java regular expressions is given as follows −Example Live Demoimport java.util.regex.Matcher; import java.util.regex.Pattern; public class Demo { public static void main(String args[]) { String regex = "Apple"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher("AppleIsAFruit"); System.out.println("Pattern: " + m.pattern()); } }The output of the above program is as follows −Pattern: AppleNow let us understand the above program.The pattern that is matched upon ... Read More
To set the color of the right border, use the border-right-color property. You can try to run the following code to implement border-color-property −ExampleLive Demo p { border-style: dotted; border-right-color: #FFFF00; } This is demo text. Output
A Vector can be printed in a comma-delimited list, in index order and surrounded by square brackets ([]) by simply using System.out.println() along with the Vector object.A program that demonstrates this is given as follows −Example Live Demoimport java.util.Vector; public class Demo { public static void main(String args[]) { Vector vec = new Vector(5); vec.add(4); vec.add(1); vec.add(3); vec.add(9); vec.add(6); System.out.println(vec); } }The output of the above program is as follows −[4, 1, 3, 9, 6]Now let us understand ... Read More
To concatenate with condition in MongoDB, use $cond and in that, work with $concat. Let us create a collection with documents −> db.demo745.insertOne({Value1:"100", Value2:"100"}); { "acknowledged" : true, "insertedId" : ObjectId("5eae6419a930c785c834e554") } > db.demo745.insertOne({Value1:"40", Value2:"50"}); { "acknowledged" : true, "insertedId" : ObjectId("5eae6421a930c785c834e555") } > db.demo745.insertOne({Value1:"13", Value2:"45"}); { "acknowledged" : true, "insertedId" : ObjectId("5eae6429a930c785c834e556") }Display all documents from a collection with the help of find() method −> db.demo745.find();This will produce the following output −{ "_id" : ObjectId("5eae6419a930c785c834e554"), "Value1" : "100", "Value2" : "100" } { "_id" : ObjectId("5eae6421a930c785c834e555"), "Value1" : "40", "Value2" : "50" } ... Read More
To set min-height and max-height of an element using CSS, you can try to run the following code −ExampleLive Demo div { max-height: 550px; min-height: 450px; background-color: red; } Below is a div with maximum and minimum height. Resize the web browser to see the effect. This is demo text. This is demo text. This is demo text. This is demo text. This is demo text. This is demo text. This is demo text. This is demo text. This is demo text.
A Vector can be cleared in Java using the method java.util.Vector.clear(). This method removes all the elements in the Vector. There are no parameters required by the Vector.clear() method and it returns no value.A program that demonstrates this is given as follows −Example Live Demoimport java.util.Vector; public class Demo { public static void main(String args[]) { Vector vec = new Vector(5); vec.add(4); vec.add(1); vec.add(3); vec.add(9); vec.add(6); vec.add(2); vec.add(8); System.out.println("The Vector elements are: " ... Read More
To find a certain element, use $project in MongoDB. Let us create a collection with documents −> db.demo744.insertOne( ... { ... studentInformation: ... [ ... { ... studentName:"Robert", ... grade:"A" ... }, ... { ... studentName:"Bob", ... grade:"C" ... }, ... { ... ... Read More