Programming Articles - Page 458 of 3363

In golang we have different inbuild function like Stat(), Open() and mkdir() to check whether a directory exist or not . Here we are using three functions. in the first one we are using the Stat() function present in the os package while in the second and third example we are using Open() and mkdir() function respectively to implement the result. Method 1: Using os.stat() Method The os package provides the Stat() function to get information about a file or directory. If the directory exists, the function returns a FileInfo structure, otherwise, it returns an error. Syntax func ... Read More

Golang provides several methods to remove a specified directory, including using the os and filepath packages. Removing a directory is a critical operation, and caution should be exercised when performing this task. This article will discuss the different methods to remove a directory in Golang, along with the syntax and algorithm for each method. Method 1: Using The os Package The os package in Golang provides several functions to perform operating system-related operations, including removing a directory. The Remove function of the os package is used to remove a directory. Syntax Remove(dirName) The Remove() function is present in os ... Read More

Introduction A queue is an abstract Data type that inserts elements from the Rear end and removes them from the Front end. There are three types of queues: Simple Queue, Priority Queue, and Circular Queue. In this tutorial, we understand why we cannot wrap around a Priority queue and the reasons for it. Priority Queue It is a unique queue that is not based on the FIFO principle for Queue operations. What makes it unique? It is the priority of its elements for removing or deQueue. Each element of the priority queue has some priority and they are removed based ... Read More

In Golang, we have two internal functions - ReadDir() and Walk function to get a list of filenames prenent in a specific directory. Here we have write three examples. In the first example We will use the ReadDir() function present in ioutil package while in the second one we are using the walk function present in the filepath package. Method 1: Using ioutil PACKAGE The ioutil package in Golang provides several functions to perform input/Output operations, including reading the files and directories. The ReadDir() function of the ioutil package is used to get the list of files in a specified ... Read More

Introduction A queue is a linear data structure that follows the FIFO principle for inserting and removing elements and has no close ending. It is functional on both ends. In this tutorial, we will learn how to turn a queue into a priority Queue and understand the meaning of queue and priority queue in the data structure. What is Queue? Queue in data structure resembles the queue in real life and is used to handle multiple data. It is an ordered list in which elements are entered on the rear end and removed from the front end. In this, the ... Read More

Introduction Queue is a linear data structure that uses the FIFO approach for inserting and removing its elements. It can be implemented by using arrays and linked lists. In this tutorial, we will analyze the time and space complexity of array based queue for its different operation. Queue Implementation Using Array The principle of Queue is its FIFO approach and it states that the element that enters first in the Queue will be the first to be removed from it. Its elements are inserted at the Rear end. Queue elements are removed from the Front end. The real-life example of ... Read More

Introduction The queue is a linear data structure that follows the FIFO approach to insert and extract its data. A priority Queue is a structured Queue, where all data have some priorities for their processing. In Java, a queue or priority queue is an interface. In this tutorial, we will examine whether we should declare a queue or priority queue as a Priority Queue in Java. Queue A Queue in Java is an interface and that interface belongs to java.util package. The queue interface extends the Collection Interface and this interface has several methods. Queue uses FIFO (First In First ... Read More

The Go programming language provides various methods to obtain the home directory of the current user. This information can be useful in many applications, such as file management, system configuration, etc. In this article, we will discuss different methods to get the home directory in Go along with syntax and examples. Method 1: Using os.UserHomeDir() The os.UserHomeDir() function is part of the Go standard library and is the simplest and most efficient method to get the home directory of the current user. Here is an example that demonstrates the usage of os.UserHomeDir() Syntax func UserHomeDir() (string, error) The UserHomeDir() ... Read More

Introduction Both Queue and Stack are linear data structures and are used to store data. Stack uses the LIFO principle to insert and delete its elements. A Queue uses the FIFO principle. In this tutorial, we will learn how to reverse a stack using Queue. Reversing means the last element of the Stack comes to first place and so on. What is Stack? The stack in the data structure is inspired by the stack in real life. It uses LIFO (Last In First Out) logic, which means the element that enters last in the Stack will be removed first. In ... Read More

One of the features of Go is the ability to search and retrieve files based on a specified pattern. In this article, we will discuss different methods to get the list of filenames that match a specified wildcard pattern in Go, and provide syntax and examples for each method. Method 1: Using the "filepath.glob" The "filepath.Glob" method is the easiest and most straightforward way to retrieve the list of filenames that match a specified wildcard pattern. The function takes a pattern as input and returns a slice of strings that match the pattern. Syntax filenames, err := filepath.Glob(pattern) The ... Read More