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C++ Articles
Page 526 of 597
File globbing in Linux in C++
p>File globbing also known as Path Name Expansion. It is the method of recognizing wildcard patterns in linux and then finding the file path expansion based on these patterns.Wildcard Patterns are strings that are used for selection of multiple files based on patterns.The character patterns like “?” , “[ ]” , “*” are used for pattern matching and multiselection of the files.Example of wildcard characters using in file globbing:Asterisk (*) : the * pattern is used when we need to match 0 or more character after the string in the filename.For example: file* will match all files with name file, files, file2, or with anything ...
Read MoreFederated database management system issues in C++
Database Management System or DBMS in short refers to the technology of storing and retrieving usersí data with utmost efficiency along with appropriate security measures.Federated Database management system is a special type of DBMS in which transparently maps more that one autonomous database into one database which is federated database.The federated database management system is useful while working with multiple applications that uses federation of databases.There are some issues with the federated database management system. They are −Managing the difference in data models, while working with federated databases multiple applications can have different type of data models and dealing with these ...
Read MoreExtended Operators in Relational Algebra in C++
Relational data model is the primary data model, which is used widely around the world for data storage and processing. This model is simple and it has all the properties and capabilities required to process data with storage efficiency.They are basic operators on Relation Algebra, here we will learn about some extended operators. They are mainly of three types:Intersection Join Divide Intersection Operation i s a special type of operation in for relations R1 and R2 where the relation in which the tuples with elements present in both relations i.e. in relation R1 and R2. JOIN Conditional Join is a special type of join in which we ...
Read MoreExternal Sorting with Example in C++
External Sorting is a category of sorting algorithm that is able to sort huge amounts of data. This type of sorting is applied on data set which acquire large memory which cannot be holded in main memory (RAM) and is stored in secondary memory ( hard disk).The idea of sorting used in external sort is quite similar to merge sort. In also possess two phases like in merge sort, In the sort phase, small memory size data sets are sorted and then in merge phase, these are combined to a single dataset.External Sorting For a huge data set which cannot be processed in ...
Read MoreEndian order and binary files in C++
In the binary file and data management, endianness is the sequence of bytes of a digital data inside the computer memory.In computer memory there are two type of endian order,Big-endian system stores the most significant byte of the data.Small-endian systems store the least significant byte of the data.
Read MoreEditors and Its types in System Programming in C++
Editors are basically computer programs that are utilised to edit files on a computer. The provide environment to a programmer to create, edit, update, format a document in any order he/she wants to.In system programming or programming, editors are software or tools that are used to edit the program. These are basically text editors of special type that have integrated functionality to edit code.Some common program editors are notepad++, visual code, sublime. Also there are some edits that provide things used to do more than just editing the code. They are the integrated development environment (IDE) which can help you edit, debug and run ...
Read MoreDumpster Diving/Trashing in C++
Dumpster diving or trashing is a technique used in cyber security and information technology which is commonly used by hackers to extract data. It is based on the fact that “something which is worthless for someone can be of great usage for someone else”. It works based on the idiom, “One man’s trash is another man’s treasure”. Trashing refers to searching online trash (unused information) and finding out fruitful information about a business or person to use it to perform hacking related activities.This dumpster diving is used to gather information to try to hack or extract information of business using a phishing technique by pretending to be ...
Read MoreDual Mode operations in OS in C++
Every system works on operations mainly in two modes to safeguard hardware’s computation. The two modes are −User ModeKernel ModeUser Mode −The OS mode in which all the user applications and programs will run. Here, the user instructions are worked on and softwares like playing music is run.Kernel Mode −The OS mode in which the hardware loads and its computations are performed. Only privileged instructions are allowed to run in kernel mode. Some common privileged instructions are −Input-Output ManagementSwitching modes between user mode and kernel mode.Interrupt managementDual Mode in OS is the switching of modes between the two modes and switching of mode ...
Read MoreHow to get website links using Invoke-WebRequest in PowerShell?
To get the links present on the website using PowerShell, we can first retrieve the data from the webpage using the Invoke-WebRequest cmdlet.$req = Invoke-WebRequest -uri "https://theautomationcode.com" $reqOutputTo retrieve only links we can use that property and there you will also find some sub-properties like InnerHTML, Innertext, href, etc as shown in the output.$req = Invoke-WebRequest -uri "https://theautomationcode.com" $req.LinksOutputinnerHTML : Scripts innerText : Scripts outerHTML : Scripts outerText : Scripts tagName : A href : https://theautomationcode.com/scripts/ We need only links so we will use the href property.$req.Links | Select -ExpandProperty hrefOutputhttps://theautomationcode.com/2020/11/ https://theautomationcode.com/author/chiragce17/ ...
Read MoreDiameter of a Binary Tree in O(n) [A new method] in C++?
The diameter of a binary tree is the (left_height + right_height + 1) for each node. So in this method we will calculate (left_height + right_height + 1) for each node and update the result . The time complexity here stays O(n).Let us first define the struct that would represent a tree node that contains the data and its left and right node child. If this is the first node to be created then it’s a root node otherwise a child node.struct Node { int data; struct Node *leftChild, *rightChild; };Next we create our newNode(int data) function that ...
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