Function label

label<T, K extends string | number | symbol>(
propName: K,
): TransformStream<T, { label: T[K]; value: T }>
Maps each chunk as an object with a "label" and a "value".

The label can be the result of a property on the chunk.
Type Parameters
- T
- K extends string | number | symbol
Parameters
- propName: K
Returns TransformStream<T, { label: T[K]; value: T }>
See
groupBy:function
Example
```
--one--------------------two--------------------three-------------------

label('length')

--{label:3,value:'one'}--{label:3,value:'two'}--{label:5,value:'three'}-
```
- Defined in packages/stream/src/transformers/label.ts:19
label<T, L>(fn: (chunk: T) => L): TransformStream<T, { label: L; value: T }>
The label can be the result of calling a provided function.
Type Parameters
- T
- L
Parameters
- fn: (chunk: T) => L
Returns TransformStream<T, { label: L; value: T }>
Example
```
--6.1------------------4.2------------------6.3------------------

label(Math.floor)

--{label:6,value:6.1}--{label:4,value:4.2}--{label:6,value:6.3}--
```
- Defined in packages/stream/src/transformers/label.ts:36