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In this article, we will learn how to find the last occurrence of an element in a Java List. It is a collection in which we can store and access elements in serial order. We can use the following ways to find the last occurrence of an element in a Java List: Using a For Loop LastIndexOf() Method Using Stream API Using a For Loop We would use a for loop to iterate through the list in reverse order and check if the desiredelement is equal ... Read More
In this article, we will explore how to determine if all elements in a Java List are the same. The following are the ways to achieve this: Using a For Loop Using Stream API Using a For Loop We will iterate through the list and compare each element with the first element. If we find any element that is not equal to the first element, we will return false. If we reach the end of the list without finding any different element, we will return true. Example In the below ... Read More
A List extends a collection that is used to store elements in a sequential manner. Let's learn how to remove multiple elements from a list in Java. The following are a few ways to do that: Using a for Loop Using removeAll() Method Using Stream API Using a For Loop To remove multiple elements from a list using a for loop. We will iterate through the list and check if each element is in the list of elements to be removed. If it is, we will remove ... Read More
A List is a collection in Java that is used to store a sequence of elements. It is part of the Java Collections Framework and allows us to perform various operations on the elements, such as adding, removing, and accessing them. Converting a list to an array in Java can be done using several methods. Below are some of the common ways to achieve this: Using For Loop Using toArray() Method Using Stream API Using a For Loop We will use the for loop to iterate ... Read More
List in Java is part of the Java Collections Framework, and it is used for storing elements in a sequential manner. It allows duplicate elements but keeps the order of insertion. The List interface is implemented by various classes such as ArrayList, LinkedList, and Vector. In this article, we will learn how to add an element to a list in Java. Ways to Add an Element to a List in Java Following are the different ways to add an element to a list in Java: Using add() Method Using addAll() Method ... Read More
Java list size is dynamic. It increases automatically whenever you add an element to it, and this exceeds the initial capacity. You can define the initial capacity at the time of list creation so that it allocates memory after the initial capacity is exhausted. We can do this using the ArrayList Constructor and Collections.nCopies() method. In this article, we will explore both methods to set the size of a list in Java. Using ArrayList Constructor Using Collections.nCopies() Let's explore these methods in detail. Using ArrayList Constructor We can create an ... Read More
To read an entire file into a std::string in C++, you can open the file using std::ifstream, read its contents using a std::stringstream or by moving the file pointer at the specified position, and then store the result in a std::string. Algorithm Here is a simple algorithm to read an entire file into a std::string in C++: Begin. Open the file using an ifstream object. Check if the file is successfully opened. Create an ostringstream object. Read the file content using rdbuf() and write it into the ostringstream. ... Read More
In this article, we will learn how to display the current date in different country formats using Java. We can import java.time package to work with the date and time API. The java.time package, along with the DateFormat and Locale classes, allows us to format the date according to various regions' standards. Displaying Date in Different Country Formats There are two or more ways to display the date in different country formats in Java: Using DateFormat Class Using LocalDate Class and DateTimeFormatter Let's explore each of these methods in detail. Using ... Read More
In this article, we will understand how to display dates of a calendar year in different formats. Java has a built-in Date class, but it is recommended to use the java.time package, to work with the modern date and time API. The package includes many date and time classes. Following are the ways to display dates of a calendar year in different formats: Using DateFormat Class Using SimpleDateFormat Class Using LocalDate Class and DateTimeFormatter Using DateFormat Class The DateFormat class is part of the java.text package. ... Read More
When you want to write a program in C++, your compiler (like GCC) converts your code into computer language. While doing this, GCC offers some special functions called built-in functions. The built-in functions are predefined functions by the compiler itself, but not provided by any standard library. The GCC compiler provides several built-in functions. Some of these functions are listed below: __builtin_popcount(x) __builtin_parity(x) __builtin_clz(x) __builtin_ctz(x) The __builtin_popcount(x) Function This builtin function is used to count the number of 1s in an integer ... Read More