Tutorial by Topics: operator

In C#, an operator is a program element that is applied to one or more operands in an expression or statement. Operators that take one operand, such as the increment operator (++) or new, are referred to as unary operators. Operators that take two operands, such as arithmetic operators (+,-,*,/), ar...

var result = possibleNullObject ?? defaultValue; ParameterDetailspossibleNullObjectThe value to test for null value. If non null, this value is returned. Must be a nullable type.defaultValueThe value returned if possibleNullObject is null. Must be the same type as possibleNullObject. The n...

X?.Y; //null if X is null else X.Y X?.Y?.Z; //null if X is null or Y is null else X.Y.Z X?[index]; //null if X is null else X[index] X?.ValueMethod(); //null if X is null else the result of X.ValueMethod(); X?.VoidMethod(); //do nothing if X is null else call X.VoidMethod(); Note that w...

The nameof operator allows you to get the name of a variable, type or member in string form without hard-coding it as a literal. The operation is evaluated at compile-time, which means that you can rename a referenced identifier, using an IDE's rename feature, and the name string will update with i...

Operators in Java programming language are special symbols that perform specific operations on one, two, or three operands, and then return a result. An operator is a symbol (or symbols) that tells a Java program to perform an operation on one, two or three operands. An operator and its opera...

An operator in a programming language is a symbol that tells the compiler or interpreter to perform a specific mathematical, relational or logical operation and produce a final result. C has many powerful operators. Many C operators are binary operators, which means they have two operands. For exa...

Python does common mathematical operators on its own, including integer and float division, multiplication, exponentiation, addition, and subtraction. The math module (included in all standard Python versions) offers expanded functionality like trigonometric functions, root operations, logarithms, a...

In C++, it is possible to define operators such as + and -> for user-defined types. For example, the <string> header defines a + operator to concatenate strings. This is done by defining an operator function using the operator keyword. The operators for built-in types cannot be change...

Pipe operators, available in magrittr, dplyr, and other R packages, process a data-object using a sequence of operations by passing the result of one step as input for the next step using infix-operators rather than the more typical R method of nested function calls. Note that the intended aim of p...

Bitwise operations alter binary strings at the bit level. These operations are incredibly basic and are directly supported by the processor. These few operations are necessary in working with device drivers, low-level graphics, cryptography, and network communications. This section provides useful k...

Wild Card with % : SELECT * FROM [table] WHERE [column_name] Like '%Value%' Wild Card with _ : SELECT * FROM [table] WHERE [column_name] Like 'V_n%' Wild Card with [charlist] : SELECT * FROM [table] WHERE [column_name] Like 'V[abc]n%' LIKE condition in WHERE clause is used...

An operator is a character that represents an action. It tells the compiler/interpreter to perform specific mathematical, relational or logical operation and produce final result. PowerShell interprets in a specific way and categorizes accordingly like arithmetic operators perform operations primari...

SELECT * FROM table WHERE (condition1) AND (condition2); SELECT * FROM table WHERE (condition1) OR (condition2);

An operator is something that takes one or more values (or expressions, in programming jargon) and yields another value (so that the construction itself becomes an expression). Operators can be grouped according to the number of values they take. Operators 'operate' or act on one (unary opera...

void expression; // Evaluates expression and discards return value +expression; // Attempt to convert expression to a number delete object.property; // Delete object's property delete object["property"]; // Delete object's property typeof operand; // Returns type of operand ~express...