gist.ts

export function extend(...args: any[]):any {
    var extendRecursive = (x:any[], extractFields:(y)=>void) => {
        for (let obj of x) {
            if (obj) {
                if (obj instanceof Array) {
                    extendRecursive(obj, extractFields)
                }
                else {
                    extractFields(obj);
                }
            }
        }
    }
    let newObj = {};
    extendRecursive(args, obj => {
        for (let key in obj) {
            //copy all the fields
            newObj[key] = obj[key];
        }
    });
    return newObj;
};