join (Functional Programming) ​
Creates a function that joins array values into a string. Use it with pipe.
typescript
const result = pipe(array, join(separator));INFO
This helper is specific to es-toolkit/fp. Use it when you want this operation as part of a pipe pipeline.
Usage ​
join converts the piped array to a string by joining its values with separator. When separator is omitted, it uses a comma.
typescript
import { join, pipe } from 'es-toolkit/fp';
pipe(['a', 'b', 'c'], join('-')); // => 'a-b-c'
pipe(['a', 'b', 'c'], join()); // => 'a,b,c'Parameters ​
separator(string, optional): The string inserted between values. Defaults to,.
Returns ​
((array: readonly T[]) => string): A function that maps a readonly T[] to a joined string.