Functions and Methods on List


Function	Input Types	Return Type	Description
`$TAIL(list1)`	List	List	Returns the list without the first element.
`$FIRST(list1)`	List	Element	Returns the first element of `list1` list.
`$LAST(list1)`	List	Element	Returns the last element of `list1` list.
`$REV(list1)`	List	List	Returns the inverse of `list1` list.
`$AT(list1, index1)`	List, Integer	Element	Returns the element at `index1` index in `list1` list. Example: `$AT("The" $+ "black" $+ "cat", 2)` returns `"black"`.
`$ATPUT(list1, index, elt)`	List, Integer, Element	List	Replaces the element of `index` position in `list1` by `elt`.
`$SUB(list1, startIndex, endIndex)`	List, Integer, Integer	List	Returns a list beginning at `startIndex` index and ending at `endIndex` index.
`$INDEX(list1, elt)`	List, Element	Integer	Returns the index of the first occurrence of `elt` element within `list1` list.
`$SOME(list1)`	List	Boolean	Returns `TRUE` if `list1` is not empty.
`$NO(list1)`	List	Boolean	Returns `TRUE` if `list1` is empty.
`$CNT(list1)`	List	Integer	Returns the number of elements in `list1` list.
`expression.SORTBY(sortCriterion)`	`expression` is a List `sortCriterion` is a String, Integer, or Real	List	Returns a list `expression` sorted by a criterion `sortCriterion`.

Examples

Prerequisite: reqSpec is an element of Requirement Specification class and req is of Requirement class.

To test if the number of requirements is bigger or equal to 2.
```
$CNT(reqSpec.getAllRequirements) >= 2
```

To test if some requirements are named Criticality.

$SOME(reqSpec.getAllRequirements[req.name="Criticality"])