matrix-map/source/methods/getWestNeighbor.js

A class object for to aid in the creation of 2D grid games.

const getWestNeighbor = function(id){
    let westNeighbor = null;

    if(!this.westEdge.has(id)){
        westNeighbor = id-1;
    }
    return westNeighbor;
}

export default getWestNeighbor