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reducer

1 7.2

A piece of code that combines many values into one value, for example adding numbers

noun
/rɪˈdjuːsər/

Specialized

: función reductora

For this project, we implemented a reducer to transform the input data into a structured format.

Examples

So the first thing here is we're saying result is a summing reducer over ints, OK?
The reducers offer very low inertia and high torque, permitting rapid acceleration and deceleration and making them suitable for use in computer-controlled automated industrial operations.

Academic text (1995)
So let's just actually, let's just focus on one reducer, OK?
The reducers are designed for use in heavy-duty operations requiring high speed and positional accuracy.

Academic text (1995)
The reducer function combines all the numbers in the list to produce a total sum.
In our application, the reducer takes the current state and an action to produce the new state.

Synonyms

combinator

vsreducer

Specialized

1 9.2

A function that combines values in programming or math

uses repeated application to merge many inputs into one value or new state

Surface Forms

reducer singular

reducers plural

Morphology

reducer = reduce (transparent) = reduce + er

Formed by adding '-er' to 'reduce' to name a function that performs reduction; the computing sense is a straightforward extension.

Etymology

Reducer comes from reduce, with re- 'back' and ducere 'to lead', so it has the sense of 'bringing many things back to one'. In computing a reducer is a function that combines many inputs into a single value, which is why we call it a reducer.