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Technical articles with clear explanations and examples
attributes in C++
Attributes are modern ways in C++ to standardize things if their code runs on different compilers. Attributes are used to provide some extra information that is used to enforce conditions (constraints), optimization and do specific code generation if required.These are like an information manual for the compilers to do some enforcing which will improve performance of the code. Attributes were first seen in C++ 11 and are important parts of the programming language since then, Also with every version some revisions are continuously made to make them more powerful and better.Let’s see how we can define attributes in C++For different ...
Read MoreHow to implement LongToIntFunction using lambda and method reference in Java?
LongToIntFunction is a functional interface from java.util.function package introduced in Java 8. This functional interface accepts a long-valued parameter as input and produces an int-valued result. LongToIntFunction interface can be used as an assignment target for a lambda expression or method reference. This interface contains only one abstract method: applyAsInt() and doesn't contain any default and abstract methods.Syntax@FunctionalInterface interface LongToIntFunction { int applyAsInt(long value); }Example of Lambda Expressionimport java.util.function.LongToIntFunction; public class LongToIntLambdaTest { public static void main(String args[]) { LongToIntFunction getInt = longVal -> { ...
Read MoreHow to implement LongToDoubleFunction using lambda and method reference in Java?
LongToDoubleFunction is a built-in functional interface and part of java.util.function package. This functional interface accepts a long-valued parameter as input and produces a double-valued result. LongToDoubleFunction can be used as an assignment target for a lambda expression or method reference. It contains only one abstract method: applyAsDouble().Syntax@FunctionalInterface interface LongToDoubleFunction { double applyAsDouble(long value); }Example of Lambda Exampleimport java.util.function.LongToDoubleFunction; public class LongToDoubleLambdaTest { public static void main(String args[]) { LongToDoubleFunction getDouble = longVal -> { // lambda expression double doubleVal = longVal; ...
Read MoreHow to implement IntToLongFunction using lambda and method reference in Java?
IntToLongFunction is a built-in functional interface from java.util.function package. This functional interface accepts an int-valued parameter and produces a long-valued result. IntToLongFunction interface can be used as an assignment target for a lambda expression or method reference. It contains only one abstract method: applyAsLong().Syntax@FunctionalInterface interface IntToLongFunction { long applyAsLong(int value); }Example of Lambda Expressionimport java.util.function.IntToLongFunction; public class IntToLongFunctionLambdaTest { public static void main(String args[]) { IntToLongFunction getLong = intVal -> { // lambda expression long ...
Read MoreHow to implement IntToDoubleFunction using lambda and method reference in Java?
IntToDoubleFunction is a functional interface from java.util.function package. This functional interface accepts an int-valued argument and produces a double-valued result. IntToDoubleFunction can be used as an assignment target for a lambda expression or method reference. It contains only one abstract method: applyAsDouble().Syntax@FunctionalInterface interface IntToDoubleFunction { double applyAsDouble(int value); }Example of Lambda Expressionimport java.util.function.IntToDoubleFunction;; public class IntToDoubleLambdaTest { public static void main(String[] args) { IntToDoubleFunction getDouble = intVal -> { // lambda expression double ...
Read MoreHow to implement DoubleToIntFunction using lambda expression in Java?
DoubleToIntFunction is a functional interface defined in java.util.function package introduced in Java 8 version. This functional interface accepts a double-valued argument and produces an int-valued result. DoubleToIntFunction interface can be used as an assignment target for a lambda expression or method reference. It contains only one abstract method: applyAsInt().Syntax@FunctionalInterface interface DoubleToIntFunction { int applyAsInt(double value) }Exampleimport java.util.function.DoubleToIntFunction; public class DoubleToIntFunctionTest { public static void main(String args[]) { DoubleToIntFunction test = doubleVal -> { // lambda expression ...
Read MoreHow to implement DoubleToLongFunction using lambda expression in Java?
DoubleToLongFunction is a built-in functional interface from java.util.function package introduced in Java 8. This functional interface accepts a double-valued parameter and produces a long-valued result. DoubleToLongFunction interface can be used as an assignment target for a lambda expression or method reference. It contains only one abstract method: applyAsLong().Syntax@FunctionalInterface public interface DoubleToLongFunction { long applyAsLong(double value) }Exampleimport java.util.function.DoubleToLongFunction; public class DoubleToLongFunctionTest { public static void main(String args[]) { double dbl = 30.1212; DoubleToLongFunction castToLong = (dblValue) -> (long) dblValue; // lambda expression ...
Read MoreHow to declare a variable within lambda expression in Java?
A lambda expression is a function that expects and accepts input parameters and produces output results. It is an instance of a functional interface and also known as a single abstract method interface (SAM interface) like Runnable, Comparator, Callable and etc. We can declare a variable as a final string[] array and able to access that array index within a lambda expression.Exampleimport java.util.*; public class LambdaTest { public static void main(String args[]) { final String[] country = {null}; List cities = new ArrayList(); ...
Read MoreHow to implement ToLongBiFunction using lambda expression in Java?
ToLongBiFunction is a in-built functional interface from java.util.function package. This functional interface accepts two reference type parameters as input and produces a long-valued result. ToLongBiFunction interface can be used as an assignment target for a lambda expression or method reference and contains only one abstract method: applyAsLong().Syntax@FunctionalInterface interface ToLongBiFunction { long applyAsLong(T t, U u); }Exampleimport java.util.*; import java.util.function.ToLongBiFunction; public class ToLongBiFunctionTest { public static void main(String[] args) { ToLongBiFunction getMobileNum = (map, value) -> { // lambda ...
Read MoreHow to implement ToLongFunction using lambda expression in Java?
ToLongFunction is a functional interface defined in java.util.function package. This functional interface accepts a reference type as input and produces a long-valued result. ToLongFunction interface can be used as an assignment target for a lambda expression or method reference. It contains only one abstract method: applyAsLong().Syntax@FunctionalInterface interface ToLongFunction { long applyAsLong(T value); }Exampleimport java.util.*; import java.util.function.ToLongFunction; public class ToLongFunctionTest { public static void main(String args[]) { List list = new ArrayList(); list.add("11"); list.add("22"); ...
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