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Articles by Nishtha Thakur
Page 37 of 40
How to use toLowerCase () in Android textview?
This example demonstrate about How to use toLowerCase () 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 Convert into lower letters.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 MoreCheck that Field Exists with MongoDB?
You can use the $exists and $ne operator for this. To understand the concept further, let us create a collection with document. The query to create a collection with document is as follows −> db.checkFieldExistDemo.insertOne({"EmployeeId":1, "EmployeeName":"John", "isMarried":true, "EmployeeSalary":4648585}); { "acknowledged" : true, "insertedId" : ObjectId("5c76f7b31e9c5dd6f1f78281") } > db.checkFieldExistDemo.insertOne({"StudentId":2, "StudentName":"John", "isMarried":false, " StudentAge":19}); { "acknowledged" : true, 0 "insertedId" : ObjectId("5c76f7e11e9c5dd6f1f78282") }Display all documents from a collection with the help of find() method. The query is as follows −> db.checkFieldExistDemo.find().pretty();Output{ "_id" : ObjectId("5c76f7b31e9c5dd6f1f78281"), "EmployeeId" : 1, "EmployeeName" : "John", "isMarried" : true, ...
Read MoreHow do I display the indexes of a collection in MongoDB?
In order to display the indexes of a collection, you can use getIndexes(). The syntax is as follows −db.yourCollectionName.getIndexes();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.indexDemo.insertOne({"StudentName":"Larry", "StudentAge":21}); { "acknowledged" : true, "insertedId" : ObjectId("5c8f7c4f2f684a30fbdfd599") } > db.indexDemo.insertOne({"StudentName":"Mike", "StudentAge":24}); { "acknowledged" : true, "insertedId" : ObjectId("5c8f7c552f684a30fbdfd59a") }Display all documents from a collection with the help of find() method. The query is as follows −> db.indexDemo.insertOne({"StudentName":"Carol", "StudentAge":20});The following is the output −{ "acknowledged" : true, "insertedId" : ObjectId("5c8f7c5e2f684a30fbdfd59b") ...
Read MoreGet distinct record values in MongoDB?
You can use distinct() method in MongoDB to get distinct record values. The syntax is as follows −db.yourCollectionName.distinct(“yourFieldName”);To understand the above syntax, let us create a collection with document. The query to create a collection with document is as follows −> db.distinctRecordDemo.insertOne({"StudentId":1, "StudentName":"John", "StudentAge":21}); { "acknowledged" : true, "insertedId" : ObjectId("5c77a78299b97a65744c1b50") } > db.distinctRecordDemo.insertOne({"StudentId":2, "StudentName":"John", "StudentAge":22}); { "acknowledged" : true, "insertedId" : ObjectId("5c77a78b99b97a65744c1b51") } > db.distinctRecordDemo.insertOne({"StudentId":3, "StudentName":"Carol", "StudentAge":21}); { "acknowledged" : true, "insertedId" : ObjectId("5c77a79a99b97a65744c1b52") } > db.distinctRecordDemo.insertOne({"StudentId":4, "StudentName":"Carol", "StudentAge":26}); { "acknowledged" : true, "insertedId" : ObjectId("5c77a7a499b97a65744c1b53") } > db.distinctRecordDemo.insertOne({"StudentId":5, "StudentName":"Sam", "StudentAge":24}); ...
Read MoreList all values of a certain field in MongoDB?
To get the list of all values of certain fields in MongoDB, you can use distinct(). The syntax is as follows −db.yourCollectionName.distinct( "yourFieldName");To understand the above syntax, let us create a collection with the document. The query to create a collection with a document is as follows −> db.listAllValuesOfCeratinFieldsDemo.insertOne({"ListOfValues":[10, 20, 30]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8fc89ed3c9d04998abf011") } > db.listAllValuesOfCeratinFieldsDemo.insertOne({"ListOfValues":[40, 50, 60]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8fc8abd3c9d04998abf012") } > db.listAllValuesOfCeratinFieldsDemo.insertOne({"ListOfValues":[10, 20, 30]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8fc8d7d3c9d04998abf013") } > db.listAllValuesOfCeratinFieldsDemo.insertOne({"ListOfValues":[40, 50, 70]}); { "acknowledged" : true, "insertedId" ...
Read MoreGetting the highest value of a column in MongoDB?
To get the highest value of a column in MongoDB, you can use sort() along with limit(1). The syntax is as follows −db.yourCollectionName.find().sort({"yourFieldName":-1}).limit(1);To understand the above syntax, let us create a collection with the document. The query to create a collection with a document is as follows −> db.gettingHighestValueDemo.insertOne({"Value":1029}); { "acknowledged" : true, "insertedId" : ObjectId("5c900b885705caea966c5574") } > db.gettingHighestValueDemo.insertOne({"Value":3029}); { "acknowledged" : true, "insertedId" : ObjectId("5c900b8d5705caea966c5575") } > db.gettingHighestValueDemo.insertOne({"Value":1092}); { "acknowledged" : true, "insertedId" : ObjectId("5c900b925705caea966c5576") } > db.gettingHighestValueDemo.insertOne({"Value":18484}); { "acknowledged" : true, "insertedId" : ObjectId("5c900b955705caea966c5577") } > db.gettingHighestValueDemo.insertOne({"Value":37474}); { "acknowledged" ...
Read MoreC++ Program to Find the Maximum Cut in a Graph
In this program to find the maximum Cut in a graph, we need to find the Edge Connectivity of a Graph. An Edge Connectivity of a Graph of a graph means it is a bridge, removing it graph will be disconnected. Number of connected components increases with the removing of bridge in a disconnected undirected graph.Functions and pseudocodeBegin Function connections() is a recursive function to find out the connections: A) Mark the current node un visited. B) Initialize time and low value C) Go through all vertices adjacent to this D) Check if the subtree ...
Read MoreHow to use substr () in Android sqlite?
Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to access this database, you don't need to establish any kind of connections for it like JDBC, ODBC etc.This example demonstrate about How to use substr () in Android sqliteStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to ...
Read MoreHow to use Linked hash set in Android?
This example demonstrates about How to use a Linked hash set in AndroidStep 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 android:orientation="vertical"> In the above code, we have taken the name and record number as Edit text, when user click on save button it will store the data into ArrayList. Click on the refresh button ...
Read MoreHow to use trim () in Android sqlite?
Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to access this database, you don't need to establish any kind of connections for it like JDBC, ODBC etc.This example demonstrate about How to use trim () in Android sqliteStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to ...
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