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Articles by Nishtha Thakur
Page 30 of 40
LongStream forEachOrdered() method in Java
The forEachOrdered() method in Java performs an action for each element of this stream, guaranteeing that each element is processed in encounter order for streams that have a defined encounter order.The syntax is as follows −void forEachOrdered(LongConsumer action)Here, parameter wrapper is a non-interfering action to perform on the elements. LongConsumer represents an operation that accepts a single long-valued argument and returns no result.To use the LongStream class in Java, import the following package −import java.util.stream.LongStream;The following is an example to implement LongStream forEachOrdered() method in Java −Example Live Demoimport java.util.*; import java.util.stream.LongStream; public class Demo { public static void ...
Read MoreEncode and decode binhex4 files using Python (binhex)
The binhex module encodes and decodes files in binhex4 format. This format is used in the representation of Macintosh files in ASCII. Only the data fork is handled.The binhex module defines the following functions −binhex.binhex(input, output): Convert a binary file with filename input to binhex file output. The output parameter can either be a filename or a file-like object (any object supporting a write() and close() method).binhex.hexbin(input, output): Decode a binhex file input. input may be a filename or a file-like object supporting read() and close() methods. The resulting file is written to a file named output unless the argument is None ...
Read MorePrettyprint in MongoDB shell as default?
You can call pretty() function on cursor object to prettyprint in MongoDB shell. The syntax is as follows −db.yourCollectionName.find().pretty();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.prettyDemo.insertOne({"ClientName":"Larry", "ClientAge":27, "ClientFavoriteCountry":["US", "UK"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a440de01f572ca0ccf5f2") } >db.prettyDemo.insertOne({"ClientName":"Mike", "ClientAge":57, "ClientFavoriteCountry":["AUS", "UK"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a4420e01f572ca0ccf5f3") }Display all documents from a collection with the help of find() method. The query is as follows −> db.prettyDemo.find();The following is the output −{ "_id" : ObjectId("5c8a440de01f572ca0ccf5f2"), "ClientName" : "Larry", "ClientAge" ...
Read MoreMatch between fields in MongoDB aggregation framework?
You can use $cmp operator for this. 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.matchBetweenFieldsDemo.insertOne({"FirstValue":40, "SecondValue":70}); { "acknowledged" : true, "insertedId" : ObjectId("5c92c9625259fcd19549980d") } > db.matchBetweenFieldsDemo.insertOne({"FirstValue":20, "SecondValue":5}); { "acknowledged" : true, "insertedId" : ObjectId("5c92c96b5259fcd19549980e") }Display all documents from a collection with the help of find() method. The query is as follows −> db.matchBetweenFieldsDemo.find().pretty();The following is the output −{ "_id" : ObjectId("5c92c9625259fcd19549980d"), "FirstValue" : 40, "SecondValue" : 70 } { "_id" : ...
Read MoreSet vs Map in C++ STL
Set is an abstract data type in which each element has to be unique because the value of the element identifies it. The value of the element cannot be modified once it is added to the set, but it is possible to remove and add the modified value of that element.A Map is an associative container that store elements in a mapped fashion. Each element has a key value and a mapped value. No two mapped values can have the same key values.So, it is clear from above that, set contains the only key, and map contains a value with ...
Read MoreThe isEmpty() method of Java AbstractCollection class
The isEmpty() method of the AbstractCollection class checks whether the collection is empty or not i.e. whether it has zero elements. It returns if the Collectionn has no elements.The syntax is as follows −public boolean isEmpty()To work with AbstractCollection class in Java, import the following package −import java.util.AbstractCollection;The following is an example to implement AbstractCollection isEmpty() method in Java −Example Live Demoimport java.util.ArrayList; import java.util.AbstractCollection; public class Demo { public static void main(String[] args) { AbstractCollection absCollection = new ArrayList(); absCollection.add("Laptop"); absCollection.add("Tablet"); absCollection.add("Mobile"); absCollection.add("E-Book ...
Read Morematch max_size() function in C++ STL
The match max_size() function in C++ STL returns the maximum number of elements in the match_results object that can be held by the match container.This function does not accept a parameter.Example Code Live Demo#include #include using namespace std; int main() { match_results m; cout
Read MoreHow to return static strings in MySQL?
In order to return static strings in MySQL, you can use UNION. Following is the syntax −select 'yourStringValue1' as yourAliasName UNION select 'yourStringValue2' as yourAliasName;Let us implement the above syntax to return static strings in MySQL. Following is the query −mysql> select 'HELLO' as staticStringsResult -> UNION -> select 'MySQL' as staticStringsResult;This will produce the following output −+---------------------+ | staticStringsResult | +---------------------+ | HELLO | | MySQL | +---------------------+ 2 rows in set (0.00 sec)In some MySQL versions, the above syntax does not work, therefore you ...
Read MoreHow to use OR Conjunctive Operators 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 OR Conjunctive Operators in Android sqlite.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details ...
Read MoreHow to stop MongoDB in a single command?
In order to stop MongoDB in a single command, use the following syntax −mongo --eval "db.getSiblingDB('admin').shutdownServer()"Let us implement the above syntax in order to stop MongoDB in one command.First, use the shortcut key −Ctrl + C;The query is as follows −C:\Program Files\MongoDB\Server\4.0\bin>mongo --eval "db.getSiblingDB('admin').shutdownServer()"The following is the output − displaying the shutdown of the MongoDB server −MongoDB shell version v4.0.5 connecting to: mongodb://127.0.0.1:27017/?gssapiServiceName=mongodb Implicit session: session { "id" : UUID("c0337c02-7ee2-45d9-9349-b22d6b1ffe85") } MongoDB server version: 4.0.5 server should be down... 2019-03-14T21:56:10.327+0530 I NETWORK [js] trying reconnect to 127.0.0.1:27017 failed 2019-03-14T21:56:11.331+0530 I NETWORK [js] reconnect 127.0.0.1:27017 failed failed 2019-03-14T21:56:11.333+0530 I QUERY [js] ...
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