Create declaration file for Polyline

polyline/polyline-tests.ts

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+/// <reference path="./polyline.d.ts" />
+
+// returns an array of lat, lon pairs
+polyline.decode('_p~iF~ps|U_ulLnnqC_mqNvxq`@');
+
+// returns a string-encoded polyline
+polyline.encode([[38.5, -120.2], [40.7, -120.95], [43.252, -126.453]]);
+
+// returns a string-encoded polyline from a GeoJSON LineString
+polyline.fromGeoJSON({ "type": "Feature",
+  "geometry": {
+    "type": "LineString",
+    "coordinates": [[-120.2, 38.5], [-120.95, 40.7], [-126.453, 43.252]]
+  },
+  "properties": {}
+});

polyline/polyline.d.ts

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+// Type definitions for Polyline 0.1.0
+// Project: https://github.com/mapbox/polyline
+// Definitions by: Arseniy Maximov <https://github.com/Kern0>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../geojson/geojson.d.ts" />
+
+interface NumberArray {
+  [index: number]: number;
+}
+
+interface Polyline {
+  decode(string: string, precision?: number): NumberArray[];
+  encode(coordinate: NumberArray[], precision?: number): string;
+  fromGeoJSON(geojson: GeoJSON.GeoJsonObject, precision?: number): string;
+}
+
+declare var polyline: Polyline;
+
+declare module "polyline" {
+    export = polyline;
+}