Returning values out of for loop in javascript

Question

I have the following function:

  function getId(a){
    var aL = a.length;
    for(i = 0; i < aL; i++ ){
      return a[i][2].split(\":\", 1)[0];
    }            


        

Answer 1

You gotta cache the string and return later:

function getId(a){
    var aL = a.length;
    var output = '';
    for(var i = 0; i < aL; i++ ){
       output += a[i][2].split(":", 1)[0];
    }    
    return output;
} 

Answer 2

You can do that with yield in newer versions of js, but that's out of question. Here's what you can do:

function getId(a){
  var aL = a.length;
  var values = [];
  for(i = 0; i < aL; i++ ){
    values.push(a[i][2].split(":", 1)[0]);
  }    
  return values.join('');
}  

Answer 3

• The return statement breaks the loop once it is executed. Therefore consider putting the return statement outside the loop.
• Since you want to return a string, you will create a variable and assign it to an empty string.(This is where will append/add results from the loop.)
• return the string variable.

So final code will look like...

function getId(a){
    var result = '';
    var aL = a.length;
    for(i = 0; i < aL; i++ ){
      result += a[i][2].split(":", 1)[0];
    } 
    return result;
  }