[jquery] Jquery each - Stop loop and return object

Can anybody tell me why the loop did not stop after the 5 entry?

http://jsbin.com/ucuqot/edit#preview

$(document).ready(function()
{
  someArray = new Array();
  someArray[0] = 't5';
  someArray[1] = 'z12';
  someArray[2] = 'b88';
  someArray[3] = 's55';
  someArray[4] = 'e51';
  someArray[5] = 'o322';
  someArray[6] = 'i22';
  someArray[7] = 'k954';  

  var test =  findXX('o322');   

});

function findXX(word)
{  
  $.each(someArray, function(i)
  {
    $('body').append('-> '+i+'<br />');
    if(someArray[i] == 'someArray')
    {
      return someArray[i]; //<--- did not stop the loop!
    }   
  });  
}

here :

http://jsbin.com/ucuqot/3/edit

function findXX(word)
{  
  $.each(someArray, function(i,n)
  {
    $('body').append('-> '+i+'<br />');
    if(n == word)
    {
      return false;
    }   
  });  
}

"We can break the $.each() loop at a particular iteration by making the callback function return false. Returning non-false is the same as a continue statement in a for loop; it will skip immediately to the next iteration."

from http://api.jquery.com/jquery.each/

Yea, this is old BUT, JUST to answer the question, this can be a bit simpler:

function findXX(word) {_x000D_
  $.each(someArray, function(index, value) {_x000D_
    $('body').append('-> ' + index + ":" + value + '<br />');_x000D_
    return !(value == word);_x000D_
  });_x000D_
}_x000D_
$(function() {_x000D_
  someArray = new Array();_x000D_
  someArray[0] = 't5';_x000D_
  someArray[1] = 'z12';_x000D_
  someArray[2] = 'b88';_x000D_
  someArray[3] = 's55';_x000D_
  someArray[4] = 'e51';_x000D_
  someArray[5] = 'o322';_x000D_
  someArray[6] = 'i22';_x000D_
  someArray[7] = 'k954';_x000D_
  findXX('o322');_x000D_
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

A bit more with comments:

function findXX(myA, word) {_x000D_
  let br = '<br />';//create once_x000D_
  let myHolder = $("<div />");//get a holder to not hit DOM a lot_x000D_
  let found = false;//default return_x000D_
  $.each(myA, function(index, value) {_x000D_
    found = (value == word);_x000D_
    myHolder.append('-> ' + index + ":" + value + br);_x000D_
    return !found;_x000D_
  });_x000D_
  $('body').append(myHolder.html());// hit DOM once_x000D_
  return found;_x000D_
}_x000D_
$(function() {_x000D_
  // no horrid global array, easier array setup;_x000D_
  let someArray = ['t5', 'z12', 'b88', 's55', 'e51', 'o322', 'i22', 'k954'];_x000D_
  // pass the array and the value we want to find, return back a value_x000D_
  let test = findXX(someArray, 'o322');_x000D_
  $('body').append("<div>Found:" + test + "</div>");_x000D_
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

NOTE: array .includes() may better suit here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes

Or just .find() to get that https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find

modified $.each function

$.fn.eachReturn = function(arr, callback) {
   var result = null;
   $.each(arr, function(index, value){
       var test = callback(index, value);
       if (test) {
           result = test;
           return false;
       }
   });
   return result ;
}

it will break loop on non-false/non-empty result and return it back, so in your case it would be

return $.eachReturn(someArray, function(i){
    ...

Try this ...

  someArray = new Array();
  someArray[0] = 't5';
  someArray[1] = 'z12';
  someArray[2] = 'b88';
  someArray[3] = 's55';
  someArray[4] = 'e51';
  someArray[5] = 'o322';
  someArray[6] = 'i22';
  someArray[7] = 'k954';  

  var test =  findXX('o322'); 
  console.log(test);



function findXX(word)
{  
  for(var i in someArray){


    if(someArray[i] == word)
    {
      return someArray[i]; //<---  stop the loop!
    }   
  }
}

Rather than setting a flag, it could be more elegant to use JavaScript's Array.prototype.find to find the matching item in the array. The loop will end as soon as a truthy value is returned from the callback, and the array value during that iteration will be the .find call's return value:

function findXX(word) {
    return someArray.find((item, i) => {
        $('body').append('-> '+i+'<br />');
        return item === word;
    }); 
}

const someArray = new Array();
someArray[0] = 't5';
someArray[1] = 'z12';
someArray[2] = 'b88';
someArray[3] = 's55';
someArray[4] = 'e51';
someArray[5] = 'o322';
someArray[6] = 'i22';
someArray[7] = 'k954';

var test = findXX('o322');
console.log('found word:', test);

function findXX(word) {
  return someArray.find((item, i) => {
    $('body').append('-> ' + i + '<br />');
    return item === word;
  });
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>