luckydev

# maximum capability of system
user@ubuntu:~$ cat /proc/sys/fs/file-max
708444

# available limit
user@ubuntu:~$ ulimit -n
1024

# To increase the available limit to say 200000
user@ubuntu:~$ sudo vim /etc/sysctl.conf

avoronkin

function waterfall (fns = []) {
    return async (...args) => {
        return fns.reduce((p, fn) => p.then(args => fn.apply(this, args)), Promise.resolve.call(this, args))
    }
}