lib/pigeonkeeper.js
function vertexIdsFromArray(arr)
    {
        var numVertices = arr.length;
        var vertexIds = [];

        for(var i = 0; i < numVertices; i++)
        {
            vertexIds.push(arr[i].id);
        }

        return vertexIds;
    }
function vertexIdsFromArray(arr)
    {
        var numVertices = arr.length;
        var vertexIds = [];

        for(var i = 0; i < numVertices; i++)
        {
            vertexIds.push(arr[i].id);
        }

        return vertexIds;
    }
function vertexIdsFromArray ( arr ) { var numVertices = arr . length ; var vertexIds = [ ] ; for ( var i = 0 ; i < numVertices ; i ++ ) { vertexIds . push ( arr [ i ] . id ) ; } return vertexIds ; }
Extracts the vertexIDs from a given array of vertices

@private
@param {Array} arr - Array of vertices
@returns {Array}
Extracts the vertexIDs from a given array of vertices