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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to write "Hello World" Program in C++?
To run the hello world program, you'll have to follow the following steps −Write a C++ programNow that you have a compiler installed, its time to write a C++ program. Let's start with the epitome of programming example's, it, the Hello world program. We'll print hello world to the screen using C++ in this example. Create a new file called hello.cpp and write the following code to it −#include int main() { std::cout
Read Morelist begin( ) and list end( ) in C++ STL
Given is the task to show the functionality list begin( ) and list end( ) function in C++ in STL.What is List in STLList is a data structure that allows constant time insertion and deletion anywhere in sequence. Lists are implemented as doubly linked lists. Lists allow non-contiguous memory allocation. List perform better insertion extraction and moving of element in any position in container than array, vector and deque. In List the direct access to the element is slow and list is similar to forward_list, but forward list objects are single linked lists and they can only be iterated forwards.What ...
Read MoreWhat does 'is not' operator do in Python?
In Python, is and is not operators are called identity operators. Each object in computer's memory is assigned a unique identification number (id) by Python interpreter. Identity operators check if id() of two objects is same. 'is not' operator returns true of id() values are different and false if they are same.>>> a=10 >>> b=a >>> id(a), id(b) (490067904, 490067904) >>> a is not b False >>> a=10 >>> b=20 >>> id(a), id(b) (490067904, 490068064) >>> a is not b True
Read MoreWhat does 'in' operator do in Python?
In Python, in and not in operators are called membership operators. Their purpose is to check if an object is a member of a certain sequence object like string, list, or tuple. The in operator returns true if object is present in sequence, false if not found>>> 'p' in 'Tutorialspoint' True >>> 'c' in 'Tutorialspoint' False >>> 10 in range(0,5) False
Read MoreHow to add/merge two hash tables in PowerShell?
Adding values of the hash table is simple as the adding string. We just need to use the addition operator (+) to merge two hash table values.Here, we have two hash tables: $htable and $htable1.$htable = [Ordered]@{EmpName="Charlie";City="New York";EmpID="001"} $htable1 = [Ordered]@{Fruit='Apple';Color='Red'}We will now add two hash tables,$htable + $htalble1PS C:\WINDOWS\system32> $htable+$htable1 Name Value ---- ----- EmpName Charlie City New York EmpID 001 Fruit Apple Color Red
Read MoreHow to extract data from SAP using .NET provider.
To extract using SSIS, you need to have access to backend system. You can use .NET connector and write a Windows application that extracts data from SAP system using Function Module.For more details on how to connect SAP using .NET connector, you can refer this blog- https://blogs.sap.com/2013/02/14/connecting-to-sap-with-nco-3/With use of BAPI’s you can allow external applications to access business processes and data in R/3 system. Below code is used to make call to BAPI. First is to create a class that implements IDestinationConfiguration −Imports SAP.Middleware.Connector Public Class ECCDestinationConfig Implements IDestinationConfiguration Public Event ConfigurationChanged(ByVal destinationName As String, ByVal args As ...
Read MoreHow to add and remove values to the Hash Table in PowerShell?
You can add values to the hash table and remove values from the hash tables. To add the values to the hash table, you need to use the below format.$hash[""] = ""We have hash table already created here, $htable = [Ordered]@{EmpName="Charlie";City="New York";EmpID="001"}PS C:\WINDOWS\system32> $htable Name Value ---- ----- EmpName Charlie City New York EmpID 001We need to add additional key “Dept” in the above hash table with the value “Technical”.$htable['Dept']="Technical"When you check the output of the above Hashtable, you can see the key-value is appended to the table.PS ...
Read MoreWhat is the difference between transient and volatile in Java?
transient: An instance variable is marked transient to indicate the JVM to skip the particular variable when serializing the object containing it. This modifier is included in the statement that creates the variable, preceding the class or data type of the variable.Examplepublic transient int limit = 55; // will not persist public int b; // will persistvolatile: The volatile modifier is used to let the JVM know that a thread accessing the variable must always merge its own private copy of the variable with the master copy in the memory.Accessing a volatile variable synchronizes all the cached copied ...
Read MoreWhat is Hash Table in PowerShell?
Hash table in a PowerShell is constructed with the Key-Value combination. Each key has its own value, so to get the value we need to refer the Key. We don’t need numeric indexing like Array to refer values.This is how the hash table looks like.Name Value ---- ----- EmpName Charlie City New York EmpID 001In the hash table creation, keys and values are separated with Semi-colons (;). In the above example, EmpName, City and EmpID are referred as keys while Charlie, New York ...
Read MoreWhat are the benefits of a module in Java 9?
An important feature introduced in Java 9 is Module. By using a module, we can divide the code into smaller components called modules. It means each module has its own responsibility and declare its dependency on other modules to work correctly.Below are the steps to create a modular project in Java 9:Initially, we can create a file named "module-info.java" and add to a package(module) for which it is created. For instance, if our package name is com.mycompany.mypackage then the file goes to the same package (src/com.mycompany.mypackage/module-info.java). We can create a module by declaring "exports" and "requires" expressions.If our modules require another module ...
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