Example of javascript generator flow

example_generator.js

g = function*(){
     console.log('\tstarted')
     while(true){
        console.log('\tloop')
        const res = yield   //get next variable and put in res
        console.log('\t', res, '= yield')

        console.log('\tyield', 'V'+res)
        yield 'V'+res    //get 'V'+res and return to caller in {value:'V'+res, done:false} format
     }
}

//initialize
gg = g()

//pass data
r = gg.next(1)
console.log(JSON.stringify(r), " = gg.next(1)")
//[Log] 	started
//[Log] 	loop
//[Log] {"done":false} – " = gg.next(1)"



r = gg.next(2)
gg.next()
console.log(JSON.stringify(r), " = gg.next(2)")
//[Log] 	 – 2 – "= yield"
//[Log] 	yield – "V2"
//[Log] 	loop
//[Log] {"value":"V2","done":false} – " = gg.next(2)"


r = gg.next(3)
gg.next()
console.log(JSON.stringify(r), " = gg.next(3)")
//[Log] 	 – 3 – "= yield"
//[Log] 	yield – "V3"
//[Log] 	loop
//[Log] {"value":"V3","done":false} – " = gg.next(3)"