generator

generator_test.js

let pFetch = fetch

if(!fetch){ 
  
  pFetch = require('node-fetch')

}
const url = 'http://numbersapi.com'
//const url = 'https://api.tvmaze.com/search/shows?q=batman'

function* getNumberStr(){
  console.log('in ggg')
      yield pFetch(`${url}/1`, {method: 'get'})
      yield pFetch(`${url}/2`, {method: 'get'})
      yield pFetch(`${url}/3`, {method: 'get'})
      yield pFetch(`${url}/4`, {method: 'get'})
      yield pFetch(`${url}/5`, {method: 'get'})
      yield pFetch(`${url}/6`, {method: 'get'})
      console.log('ggg end')
  
}


const getResult = (ite) =>{

let n = 0
    for(let curr of  ite){


        curr.then( res => {

          n+=1
          if(n>3){
            ite.throw(new Error('take enough~'))
          }
          return res.text()
        
        }).then(text => {
          console.log(text)
        }).catch(err => {
          console.error(err)
        })    
  
    }

}

const ite = getNumberStr()

getResult(ite)