function append(args:Array<string>, curdir:any):string {
    var buf = "";
    if (args.length == 0) {
        buf += "append: missing operand\n";
    }
    else {
        if (curdir[args[0]] == undefined) {
            curdir[args[0]] = "";
        }
        else {
            buf += "append: file already exists\n";
        }
        for (let i = 1; i < args.length; i++) {
            curdir[args[0]] += args[i] + "\n";
        }
    }
    return buf;
}
export { append };