ashwinkumar2438

function* addGen(sum){

let first= yield sum;
sum+=first;
  
let second=yield sum;
sum+=second;

return sum;

ashwinkumar2438

function* genRace(){

yield 'first';
yield 'second';
yield 'third';

return "stupid race";
}

ashwinkumar2438

function* GenIterator(i=0,counts=10){
  
  let endpoint=i+counts;

  while(i<endpoint){
      yield  i++;
  }

}
console.log([...GenIterator(24,7)]) // @returns : [24, 25, 26, 27, 28, 29, 30]

ashwinkumar2438

mystore.store("books")
       .add([{book_name:"Eloquent JavaScript"},{book_name:"You don't know JS"}])
       .store("users")
       .add({name:"javascript"})
       .then(()=> mystore.store("books").get({book_name:"Eloquent JavaScript"}) ) 
       .then(res=>{
                console.log(res.books); //The final result        
            }) 
       .catch(()=>{
                console.log("transaction failed");

ashwinkumar2438

var request=db.transaction(["books","users"],"readwrite");
var bookStore=request.objectStore("books");
bookStore.add({book_name:"Eloquent JavaScript"});
bookStore.add({book_name:"You don't know JS"});
var userStore=request.objectStore("users");
userStore.add({name:"javascript"});
request.oncomplete=()=>{

  let getReq=db.transaction("books","readonly");
  let bookStore=getReq.objectStore("books");

ashwinkumar2438

import SimpleStore from "simplestore-indexeddb";

new SimpleStore("mystore").addStores([
  {    name: "books",
       indices: ["book_name"]
  },
  {
       name:"users"
  }
]).then(res=>{  let mystore=res.simplestore; });

ashwinkumar2438

let openRequest = indexedDB.open("mystore", 3);

openRequest.onupgradeneeded = function(event) {
   let db = openRequest.result;
  switch(event.oldVersion) { // existing db version
    case 1:
      // do changes for update from version 1 to 3...
         db.createObjectStore("books",{autoIncrement:true});
    case 2:
      // do changes for update from version 2 to 3...

ashwinkumar2438

{
 off(eventname,callback){
        if(!this.hasOwnProperty(eventname))return false;
        if(!(callback && callback.constructor===Function))return false;

        if(Array.isArray(this[eventname])){
          this[eventname]=this[eventname].filter(eventcb=>eventcb!==callback);
        }
  }
 

ashwinkumar2438

{
    emit(eventname,...args){
        if(!this.hasOwnProperty(eventname))return false;
        
        if(Array.isArray(this[eventname])){
          
            this[eventname].forEach(callback=>callback(...args));
          
        }
    }

ashwinkumar2438

{
  on(eventname,callback){
        if(!eventname)return false;
        if(!(callback && callback.constructor===Function))return false;

        if(!this[eventname]){
            this[eventname]=[];
        } 

        if(!this[eventname].includes(callback) && Array.isArray(this[eventname]) && this.hasOwnProperty(eventname)){