setlist Function

Assigns a value into a specified position in a list, overwriting its current value. If necessary, the list is extended to contain the indexed element. New elements created during list extension will be null.

first argument– list

second argument– integer specifying position in the list at which to insert the new element, starting with zero.

third argument– element

Example 1

<setlist>
   <list>
      <s>apples</s>
      <s>oranges</s>
      <s>wiper blades</s>
   </list>
   <i>2</i>
   <s>bassoons</s>
</setlist>

This expression results in the following list and returns null.

<list>
   <s>apples</s>
   <s>oranges</s>
   <s>bassoons</s>
</list>

Example 2

<setlist>
   <list>
      <s>apples</s>
      <s>oranges</s>
      <s>wiper blades</s>
   </list>
   <i>5</i>
   <s>bassoons</s>
</setlist>

This expression results in the following list and returns null.

<list>
   <s>apples</s>
   <s>oranges</s>
   <s>wiper</>
   </null>
   </null>
   <s>bassoons</s>
</list>