Operators

Pig Basics

An introduction to Apache Pig's procedural data-flow language, Pig Latin, its execution model, and how it compares to Hive.

Hooks and Connections

Understand how Airflow Connections store credentials for external systems and how Hooks provide a Python interface to interact with them.

Operators

Understand what Airflow operators are, the major built-in categories, and how to configure or subclass them to build reliable tasks.

The TaskFlow API

Learn how Airflow's @dag and @task decorators let you write DAGs as plain Python functions, with automatic XCom passing and dynamic task mapping.

MATLAB Operators and Expressions

Arithmetic, relational, logical, and element-wise operators in MATLAB, and how operator precedence governs expression evaluation.

R Operators

A tour of R's arithmetic, relational, logical, and special operators, including vectorized behavior and common pitfalls like && vs &.

Julia Operators and Expressions

Julia's arithmetic, comparison, and logical operators, the dot-broadcasting syntax, and how the language's expression-oriented design ties it all together.

D Operators and Expressions

How D's arithmetic, comparison, logical, and special operators like ^^, .., and is work, with a focus on gotchas like integer division.

Lua Operators

A tour of Lua's arithmetic, relational, logical, concatenation, and length operators, including the truthiness rules that surprise newcomers.

Metamethods and Operator Overloading

Learn how Lua's arithmetic, comparison, and conversion metamethods let custom tables respond naturally to +, ==, tostring(), and even direct function-call synt…

Operators and Truth in Groovy

Groovy's safe navigation, Elvis, and spaceship operators, operator overloading, and the rules of Groovy Truth for evaluating objects in boolean contexts.

Perl Operators

A tour of Perl's arithmetic, string, comparison, logical, and assignment operators, and the pitfalls of mixing numeric and string comparisons.

Scala Operators and Expressions

How Scala treats operators as method calls, covers arithmetic, comparison, and logical operators, and why almost everything in Scala is an expression that retu…

Kubernetes Operators Explained

What a Kubernetes Operator is, how it combines a CustomResourceDefinition with a controller to automate operational knowledge, and patterns for building one re…

Advanced Conditionals and Test Operators

Master Bash's test, [ ], and [[ ]] constructs with string, numeric, and file test operators to write robust, bug-free conditional logic.

Query Operators

Master MongoDB's comparison, logical, element, and array query operators like $gt, $in, $and, $exists, and $elemMatch for precise filtering.

Arithmetic Operators in C++

Learn how C++ arithmetic operators (+, -, *, /, %) work, including integer division truncation and modulo rules, with runnable examples.

Assignment Operators in C++

Learn C++ assignment operators including =, +=, -=, *=, /=, and %=, and how compound assignment shortens common update expressions.

Bitwise Operators in C++

Understand C++ bitwise operators &, |, ^, ~, <<, and >> that manipulate the binary representation of integers directly.

Increment and Decrement Operators in C++

Learn the difference between prefix and postfix ++ and -- in C++, a frequent exam topic, with clear step-by-step examples.

Logical Operators in C++

Master the C++ logical operators &&, ||, and !, and understand short-circuit evaluation and how it can skip side effects.

Relational Operators in C++

Understand C++ relational (comparison) operators such as ==, !=, <, >, <=, and >=, and how they always evaluate to a bool result.

Bitwise Operators in C

Master C bitwise operators — AND, OR, XOR, NOT, left shift, right shift — with truth tables, precedence, and signed-shift pitfalls.

Operators in C

Learn C operators — arithmetic, relational, logical, assignment, and increment/decrement — with syntax, examples, and exam-ready MCQs.