Reducer: meaning, definitions and examples

Typically used in programming to describe a function that takes an input list or collection and combines it into a single output, often used with functions like reduce in JavaScript.

• The reducer function calculates the total sum of all the values in the array.
• In Redux, the reducer is responsible for updating the state based on the actions dispatched.

Used in various contexts to describe a device or function that changes the nature, structure, or format of something. In technology, it often refers to modifying data formats or structures.

• In text processing, a transformer function may convert a string of text to uppercase.
• Transformers in machine learning can modify and improve the data before feeding it to algorithms.

Often used in mathematical or computational contexts to describe a variable that stores the ongoing result of a series of additions, subtractions, or other operations.

• The accumulator keeps track of the total score as the game progresses.
• In programmable calculators, the accumulator holds the running total as operations are performed.

Typically used in a technical or industrial context to refer to a device or substance that decreases the size, amount, or strength of something.

• The chemical reducer lowered the pH level of the solution.
• A speed reducer was installed in the machinery to ensure safe operation.

Often used in a scientific or medical context to describe something that slows down or prevents a particular process or reaction.

• An enzyme inhibitor can block the action of specific enzymes in the body.
• The corrosion inhibitor added to the pipeline helps to prevent rust.

Commonly used in social or digital environments to describe a person or tool that manages, regulates, or oversees activities to ensure they are conducted orderly or fairly.

• The forum moderator removed the offensive comment.
• In a debate, the moderator ensures that each participant gets an equal chance to speak.