amgularjs turn array into a string code example
Example 1: .join in javascript
const elements = ['Sun', 'Earth', 'Moon'];
console.log(elements.join());
// output: "Sun,Earth,Moon"
console.log(elements.join(''));
// output: "SunEarthMoon"
console.log(elements.join('-'));
// output: "Sun-Earth-Moon"
Example 2: js array join
['h', 'e', 'y'].join('')
// hey