Programming Articles - Page 2187 of 3363

DescriptionThere is an array of (2 * n – 1) integers. We can change sign of exactly n elements in the array. In other words, we can select exactly n array elements, and multiply each of them by -1. Find the maximum sum of the array.ExampleIf input array is {-2, 100, -3} then we can obtain maximum changing sign of -2 and -3. After changing sign array becomes −{2, 100, 3} and maximum sum of this array is 105.AlgorithmCount negative numbersCalculate the sum of the array by taking absolute values of the numbers.Find the minimum number of the array by ... Read More

A Consumer interface is a predefined functional interface that can be used when creating lambda expressions or method references. This interface represents an operation that accepts a single input parameter and doesn't return anything. It contains only one method named accept(). The BiConsumer interface is similar to a Consumer interface and accepts two input parameters and doesn’t return anything.Syntax@FunctionalInterface public interface Consumer @FunctionalInterface public interface BiConsumerExampleimport java.util.*; import java.util.function.*; public class ConsumerBiConsumerTest {    public static void main(String[] args) {       Consumer c = (x) -> System.out.println(x.toLowerCase());  // lambda expression       c.accept("Raja");         Consumer con = (x) -> {  // ... Read More

Method reference is a simplified form of the lambda expression. It can specify a class name or instance name followed by the method name. The "::" symbol can separate a method name from the name of an object or class.An instance method reference refers to an instance method of any class. In the below example, we can implement an instance methods reference using the class name.Syntax::Exampleimport java.util.*;; import java.util.function.*; public class ClassNameRefInstanceMethodTest {    public static void main(String args[]) {       List empList = Arrays.asList(          new Employee("Raja", 15000),          new Employee("Adithya", 12000),          new Employee("Jai", 9000),   ... Read More

A Callable interface defined in java.util.concurrent package. An object of Callable returns a computed result done by a thread in contrast to a Runnable interface that can only run the thread. The Callable object returns Future object that provides methods to monitor the progress of a task executed by a thread. An object of the Future used to check the status of a Callable interface and retrieves the result from Callable once the thread has done.In the below example, we can write a Callable interface as a Lambda Expression.Exampleimport java.util.concurrent.*; public class LambdaCallableTest {    public static void main(String args[]) throws InterruptedException {       ExecutorService executor = Executors.newSingleThreadExecutor();   ... Read More

the fmod()in python implements the math modulo operation. The remainder obtained after the division operation on two operands is known as modulo operation. It is a part of standard library under the math module. In the below examples we will see how the modulo operation gives different out puts under various scenarios.Positive numbersFor positive numbers, the result is the remainder of the operation after the first integer is divided by the second. Interesting the result always comes as a float as we can see from the type of the result.Example Live Demofrom math import fmod print(fmod(6, 7)) print(type(fmod(6, 7))) print(fmod(0, 7)) ... Read More

We have usually seen the print command in python printing one line of output. But if we have multiple lines to print, then in this approach multiple print commands need to be written. This can be avoided by using another technique involving the three single quotes as seen below.Example Live Demoprint(''' Motivational Quote : Sometimes later becomes never, Do it now. Great things never come from comfort zones. The harder you work for something, the greater you'll feel when you achieve it. ''') Running the above code gives us the following result:Motivational Quote : Sometimes later becomes never, Do ... Read More

In Python, a list is a built-in data structure that is used to store an ordered collection of multiple items in a single variable. Lists are mutable that means we can add, remove, and change its elements. In this article, we will learn how we can add the corresponding elements of two Python Lists. You are given two equal sized lists in Python and your task is to create a new list containing sum of corresponding elements of the lists.Consider the following input output scenario:Scenario Input: List1 = [3, 6, 9, 45, 6] List2 = [11, 14, 21, ... Read More

Suppose we have an array A[] with n positive elements. We have to create another array B, such that B[i] is XOR of all elements of A[] except A[i]. So if the A = [2, 1, 5, 9], then B = [13, 14, 10, 6]To solve this, at first we have to find the XOR of all elements of A, and store it into variable x, then for each element of A[i], find B[i] = x XOR A[i]Example Live Demo#include using namespace std; void findXOR(int A[], int n) {    int x = 0;    for (int i = 0; ... Read More

Suppose we have an array A[], with n elements. We have to find another array B[], whose size is n+1, such that GCD of B[i] and B[i + 1] is A[i]. If there are multiple solutions, then print one of them whose array sum is minimum. So if A = [1, 2, 3], then output will be [1, 2, 6, 3]When A has only one element say K, then B = [K, K]. So the B[0] will be A[0]. Now consider we are done up to index i, so we have already processed index i, and calculated B[i + 1]. ... Read More

Here we will see that is the upper_bound() function in C++ STL. This function returns an iterator that points to the first element in the container, which is considered to go after val. The syntax is like:iterator upper_bound (const value_type& val); const_iterator upper_bound (const value_type& val) const;The return value is an iterator, pointing to the first element in the container which is considered to go after val.Example Live Demo#include #include using namespace std; int main () {    set myset;    set::iterator itlow, itup;    for (int i = 1; i < 10; i++) myset.insert(i*10);    itup = myset.upper_bound ... Read More