single-expression function

noun

UK /ˈsɪŋɡəl ɪkˈspreʃən ˈfʌŋkʃən/

US /ˈsɪŋɡəl ɪkˈspreʃən ˈfʌŋkʃən/

A tiny helper that does one job and gives back an answer right away.

She wrote a single-expression function to add two numbers in one line.

SYNONYMS

one-liner function lambda function anonymous function inline function

RELATED WORDS

arrow function closure callback expression body

OTHER MEANINGS

2. A function whose whole body is just one expression, with no extra statements.

In many languages, a single-expression function skips the return keyword.

3. A short piece of code that computes a value without storing it in a variable first.

The map call took a single-expression function to double each item.

4. A compact way to write a small routine, often used for quick tasks.

He replaced the long method with a single-expression function for clarity.