Reset arrays value inside angular.foreach loop

Question

I have an array of empty objects like this:

var a = [ {}, {}, {}, {}, {}, {} ];

And an array of properties:

var colors = ["red", "green", "blue"];

I need to assign each color in "colors" to every element of "a" array with angular foreach. But the length of "a" array is greater than "colors". I want to assign the colors "by circle" So the result needs to be like this:

var a = [
    {color: "red"},
    {color: "green"},
    {color: "blue"},
    {color: "red"},
    {color: "green"},
    {color: "blue"},
    {color: "red"}
];

angular.forEach(a, function(elem, index) {
  if (a.length > colors.length) {
    // .......                       
  }
  elem.color = colors[index];
});

The question: Is there some way to reset the index of foreach to start looping the "colors" array from beginning? Thanks for help

Answer 1

try this

var a = [ {}, {}, {}, {}, {}, {} ];
var colors = ["red", "green", "blue"];

a.forEach(function(item,key){
    item.color = colors[key % colors.length];
})
console.log(a)

Answer 2

try javascript map function like this

 var a = [ {}, {}, {}, {}, {}, {}, {} ]; var colors = ["red", "green", "blue"]; a = a.map(function(o,i){ var color = (colors[i]) ? colors[i] : callFunc(i); o.color =color; return o; function callFunc(i){ var diff = (i - colors.length)% (colors.length) return colors[diff] } }) console.log(a) 

Answer 3

You can simply have a counter i inside the foreach. In each iteration increment i like i++ and once it reaches the length of colors array, just reset it like i=0 and the color[i] can be used to get the color name.