title: Set value to an array in pentaho javascript step
body: <p>i have some values in the input and i want to save them into an array but first i want to set the "0" index of the array to 0 and then in the 1,2,3,4 indexs add the value of the input but i can get to make it </p>
  
  <p>before to set the values of the input i set the 0 to the position 0 of the array but it doesnt work</p>
  
  <p>the thing is that i want to use only the first four number of the input_data into an array but first set the 0 position to 0 and then add 5,10,15,20.
  so the final array would be 0,5,10,15,20</p>
  
  <p>i set the index "0" of the array to 0 and the other indexes i fill them whit the incoming data.</p>