Function map

map<I, O>(fn): TransformStream<I, O>
Transforms chunks from one value to another.
Type Parameters
- I
- O
Parameters
- fn: ((x) => O | Promise<O>)
  - - (x): O | Promise<O>
    - Parameters
      x: I
      Returns O | Promise<O>
Returns TransformStream<I, O>
Example
```
--1----2----3----4----|

map((x) => x + 1)

--2----3----4----5----|
```
- Defined in packages/stream/src/transformers/map.ts:14

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