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Articles by Anvi Jain
Page 34 of 43
How to use lastIndexOf () in Android textview?
This example demonstrate about How to use lastIndexOf () in Android textview.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 taken name as Edit text, when user click on button it will take data and returns last index of “sai”.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; ...
Read MoreHow to use replace () in Android textview?
This example demonstrate about How to use replace () in Android textview.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 taken name as Edit text, when user click on button it will take data and replace all a values withStep 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; ...
Read MoreGet a count of total documents with MongoDB while using limit?
You can use $facet operator for this. To understand the concept, let us create a collection with document. The query to create a collection with document is as follows −> db.totalDocumentDemo.insertOne({"InstructorId":100, "InstructorName":"Larry", "InstructorFav ouriteSubject":["Java", "MongoDB", "Python"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c76e6701e9c5dd6f1f78274") } > db.totalDocumentDemo.insertOne({"InstructorId":200, "InstructorName":"Sam", "InstructorFav ouriteSubject":["SQL Server", "C#", "Javascript"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c76e69c1e9c5dd6f1f78275") }Display all documents from a collection with the help of find() method. The query is as follows −> db.totalDocumentDemo.find().pretty();Output{ "_id" : ObjectId("5c76e6701e9c5dd6f1f78274"), "InstructorId" : 100, "InstructorName" : "Larry", "InstructorFavouriteSubject" : [ ...
Read MoreFind largest document size in MongoDB?
To find the largest document size in MongoDB, you need to write a script in the shell.To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.largestDocumentDemo.insertOne({"StudentName":"John"}); { "acknowledged" : true, "insertedId" : ObjectId("5c8ed2e32f684a30fbdfd57d") } > db.largestDocumentDemo.insertOne({"StudentName":"Carol", "StudentAge":22, "StudentCountryName":"US", "TechnicalSubject":["C", "C++", "Java", "MySQL"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8ed3282f684a30fbdfd57e") } > db.largestDocumentDemo.insertOne({"StudentName":"Mike", "StudentAge":22}); { "acknowledged" : true, "insertedId" : ObjectId("5c8ed3382f684a30fbdfd57f") }Display all documents from a collection with the help of find() method. The query is as follows −> ...
Read MoreC++ Program to Generate N Number of Passwords of Length M Each
This is a C++ Program to Generate N Number of Passwords of Length M Each.AlgorithmBegin Take the length of password as input. function permutation() generate random passwords: /* Arguments A pointer array a. Total Number of random numbers m. Length of the password s. */ // Body of the function: if (m == s) for i = 0 to s-1 Print *(a + i) else for i = m to s-1 ...
Read MoreHow to use startsWith () in Android textview?
This example demonstrate about How to use startsWith () in Android textview.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. Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class MainActivity extends AppCompatActivity { EditText name; Button button; TextView text; @Override protected void onCreate(Bundle savedInstanceState) { ...
Read MoreGet MongoDB documents with max attribute per group in a collection?
You can get documents with max attribute per group in a collection using $sort operator along with $group statement.To understand the concept further, let us create a collection with document. The query to create a collection with document is as follows −> db.maxAttributePerGroup.insertOne({"StudentFirstName":"John", "StudentLastName":"Smith ", "StudentAge":29, "StudentId":10}); { "acknowledged" : true, "insertedId" : ObjectId("5c76ee341e9c5dd6f1f78277") } > db.maxAttributePerGroup.insertOne({"StudentFirstName":"Carol", "StudentLastName":"Taylo r", "StudentAge":19, "StudentId":10}); { "acknowledged" : true, "insertedId" : ObjectId("5c76ee4e1e9c5dd6f1f78278") } > db.maxAttributePerGroup.insertOne({"StudentFirstName":"Adam", "StudentLastName":"Smit h", "StudentAge":34, "StudentId":20}); { "acknowledged" : true, "insertedId" : ObjectId("5c76ee631e9c5dd6f1f78279") } > db.maxAttributePerGroup.insertOne({"StudentFirstName":"Bob", "StudentLastName":"Taylor" , "StudentAge":58, "StudentId":20}); { ...
Read MoreOpposite of $addToSet to '$removeFromSet' in MongoDB?
To get the opposite of $addToSet to '$removeFromSet', use the $pull operator.Let us create a collection with a document. The query to create a collection with a document is as follows −> db.oppositeAddToSetDemo.insertOne({"StudentName":"John", "StudentHobby":["Cricket", "Cooking", "Drawing"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8eddcc2f684a30fbdfd588") } > db.oppositeAddToSetDemo.insertOne({"StudentName":"Carol", "StudentHobby":["Cricket", "Dance", "Hiking"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8eddfd2f684a30fbdfd589") } > db.oppositeAddToSetDemo.insertOne({"StudentName":"David", "StudentHobby":["Learning", "Photography"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8ede272f684a30fbdfd58a") }Display all documents from a collection with the help of find() method. The query is as follows −> db.oppositeAddToSetDemo.find().pretty();The following is the output −{ "_id" ...
Read MoreHow to list all users in the Mongo shell?
In order to list all users in the Mongo shell, use the getUsers() method or show command.Case 1 − Using getUsers()The syntax is as follows −db.getUsers();Case 2 − Using show commandThe syntax is as follows −show users;Let us implement both the syntaxes in order to list all users in the Mongo shell.Case 1 − The first query is as follows −> db.getUsers();The following is the output −[ { "_id" : "test.John", "user" : "John", "db" : "test", "roles" : [ { ...
Read MoreMongoDB SELECT COUNT GROUP BY?
You can achieve this with the help of an aggregate framework. To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.countGroupByDemo.insertOne({"StudentId":10, "StudentName":"John"}); { "acknowledged" : true, "insertedId" : ObjectId("5c7700871e9c5dd6f1f78296") } > db.countGroupByDemo.insertOne({"StudentId":10, "StudentName":"Carol"}); { "acknowledged" : true, "insertedId" : ObjectId("5c77008f1e9c5dd6f1f78297") } > db.countGroupByDemo.insertOne({"StudentId":20, "StudentName":"Sam"}); { "acknowledged" : true, "insertedId" : ObjectId("5c7700971e9c5dd6f1f78298") } > db.countGroupByDemo.insertOne({"StudentId":30, "StudentName":"Mike"}); { "acknowledged" : true, "insertedId" : ObjectId("5c7700a21e9c5dd6f1f78299") } > db.countGroupByDemo.insertOne({"StudentId":30, "StudentName":"David"}); { "acknowledged" : true, "insertedId" : ObjectId("5c7700aa1e9c5dd6f1f7829a") } ...
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