featureReduce

Reduce features in any GeoJSON object, similar to Array.reduce().
任何GeoJSON对象中的ReduceFeature，类似于Array.reduce()。

> npm install @turf/meta

参数

参数	类型	描述
geojson	(FeatureCollection|Feature|Geometry)	任何 GeoJSON 对象
callback	Function	a method that takes (previousValue, currentFeature, featureIndex)
initialValue	(*)	Value to use as the first argument to the first call of the callback.

返回

• • The value that results from the reduction.

示例

var features = turf.featureCollection([
  turf.point([26, 37], {"foo": "bar"}),
  turf.point([36, 53], {"hello": "world"})
]);

turf.featureReduce(features, function (previousValue, currentFeature, featureIndex) {
  //=previousValue
  //=currentFeature
  //=featureIndex
  return currentFeature
});