地图

地图 （Map） 会进行一对一的录制。

Redis 堆栈 
public <I extends java.io.Serializable> GearsBuilder<I> map​(
	gears.operations.MapOperation<T,​I> mapper)

Maps each input record in the pipe to an output record, one-to-one.

Parameters

Type parameters:

Name Description
I The template type of the returned builder

Function parameters:

Name Type Description
mapper MapOperation<T,​I> For each input record, returns a new output record

Returns

Returns a GearsBuilder object with a new template type.

Example

Map each record to its string value:

GearsBuilder.CreateGearsBuilder(reader).
 		map(r->{
    		return r.getStringVal();
});
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