Callbag operator that emits only the last item emitted by the source.
import forEach from 'callbag-for-each'
import interval from 'callbag-interval'
import last from 'callbag-last-element'
import pipe from 'callbag-pipe'
import take from 'callbag-take'
pipe(
interval(100),
take(5),
last,
forEach(v => {
console.log(v) // will log 4
})
)