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flattenReduce

Description

Reduce flattened features in any GeoJSON object, similar to Array.reduce().

Parameters

NameTypeDescription
geojsonFeatureCollection | Feature | Geometryany GeoJSON object
callbackFunctiona method that takes (previousValue, currentFeature, featureIndex, multiFeatureIndex)
initialValue?*Value to use as the first argument to the first call of the callback.

Returns

    * The value that results from the reduction.

Examples

var features = turf.featureCollection([
turf.point([26, 37], { foo: "bar" }),
turf.multiPoint(
[
[40, 30],
[36, 53],
],
{ hello: "world" },
),
]);

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

Installation

$ npm install @turf/meta

import { flattenReduce } from "@turf/meta";
const result = flattenReduce(...);
$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.flattenReduce(...);