/**
* Filters out first 'n' elements from the list
*/

/**
* Represents a array
*/
var list = [ 1, 2, 3, 4, 5, 6, 7, 6, 3, 4, 5, 12, 123, 2, 2, 23, 4, 5, 67, 4, 2, 34, 23, 34, 5, 45];


/**
* Represents a filterArray method.
* @ constructor
* @param {array} arrayItem - An array containing some elements
*/
function filterArray(arrayItem) {
 var list = []
 var n = 20;
 for(i = 0; i < n ; i++) {
    if (arrayItem[i] < n ) {
      list.push(arrayItem[i])
    }
 }
 return list
}

/**
* Call the function and pass an array
* @param {list}
*/
filterArray(list)

// [1, 2, 3, 4, 5, 6, 7, 6, 3, 4, 5, 12, 123, 2, 2, 23, 4, 5, 67, 4]