array contains and remove

/**
 * Check whether an item is in an array.
 * @param {Obj} item
 * @param {Array} array
 * @return {Boolean} 
 */
contains = function(item, array) {
  for(var i in array) {
    if(array[i] === item) {
      return true;
    }
  }
  return false;
} 

/**
 * Remove an item in an array.
 * @param {Obj} item
 * @param {Array} array
 */
remove = function(item, array) {
  for(var i in array) {
    if(array[i] === item) {
      array.splice(i, 1);
    }
  }
}