JS - Call function and receive new value from array each new call

Question

I am trying to call a function and for it to return a new string each time it is called. If it is called and all strings have been called it then loops back to the start.

Pseudo Code:

function getString(){
    var array = ['1','2','3','4'];
    // JS Magic??
    return finalVal;
}

Expected Magic:

getSting();    
1
getSting();
2
getSting();
3
getSting();
4
getSting();
1
getSting();
2

You get the idea I'm sure.

Thanks!

score 3 · Accepted Answer · edited Mar 23 '17 at 11:46

You can use scope to persist current index. Something like this.

var getString = (function(arr, i) {
   return function(){
       return arr[(i++)%arr.length]
   }
}(['1','2','3','4'], 0))

var getString = (function(arr, i) {
       return function(){
           return arr[(i++)%arr.length]
       }
    }(['1','2','3','4'], 0))
console.log(getString());
console.log(getString());
console.log(getString());
console.log(getString());
console.log(getString());
console.log(getString());
console.log(getString());

JS - Call function and receive new value from array each new call

1 Answers1