List (Stringlist function)

Construct a new Stringlist from list of strings (Stringlist class)

This shared function is a virtual constructor, or factory method, for Stringlists. List invokes the creation of a new Stringlist instance, then populates that instance with items that are, respectively, the values of the method arguments.

Syntax

%newList = [%(Stringlist):]List( itemList)

Syntax terms

%newlist	A declared or existing stringlist object.
itemList	A comma-delimited set of strings, each of which, from left to right, becomes an item in the resultant new stringlist, %newlist.

Usage notes

• list requires at least one argument, which may be null.
• If an existing stringlist is set to receive the result of list, then any existing item(s) in that stringlist are entirely removed before the new item(s) are added.
• For more information about factory methods, see Virtual Constructor methods.
• The maximum number of itemList values is 62.

Examples

1. List is a constructor and as such can be called with no method object, with an explicit class name, or with an object variable, even if that object is null:

   %sl = list(itemlist) %sl = %(Stringlist):list(itemlist) %sl = %sl2:list(itemlist)

2. The following list method call creates a new stringlist instance whose three items are, respectively, the strings Moe, Larry, and Curly:

   %sl is object stringlist %sl = list('Moe', 'Larry', 'Curly')

3. You can use the list method in contexts where a stringlist is a method parameter. For example, the Run method of the Daemon class takes a stringlist object as an argument. A list method call can be used for such an argument, as shown below:

   %d is object daemon

   ...

   %d:run(%(stringlist):list('*LOWER', 'b', -

   'printText Whatever', 'printText More', 'end')):print

   However, in this example, it is necessary above to specify the class %(Stringlist): preceding the keyword list, because strings are also valid in the first argument for Run, and list; without a qualifier it could be interpreted as a field called list.
4. In cases where a stringlist argument is expected, you can specify the List keyword without a qualifier. For example, a user method called Stuffit takes a stringlist input:

   %foo:stuffit(list('Hickory', 'Dickory', 'Doc'))

See also

Stringlist class	List of Stringlist methods	Stringlist methods syntax
Notation conventions for methods