docs/libs/typescript.js
function reduceProperties(map, callback, initial) {
        var result = initial;
        for (var key in map) {
            result = callback(result, map[key], String(key));
        }
        return result;
    }
function reduceProperties(map, callback, initial) {
        var result = initial;
        for (var key in map) {
            result = callback(result, map[key], String(key));
        }
        return result;
    }
function reduceProperties ( map , callback , initial ) { var result = initial ; for ( var key in map ) { result = callback ( result , map [ key ] , String ( key ) ) ; } return result ; }
Reduce the properties of a map.

NOTE: This is intended for use with Map<T> objects. For MapLike<T> objects, use
reduceOwnProperties instead as it offers better runtime safety.

@param map The map to reduce
@param callback An aggregation function that is called for each entry in the map
@param initial The initial value for the reduction.
Reduce the properties of a map .