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Help: Fixture to define and manipulate lists in the wiki
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!-List Fixture-! allows Lists to be defined and manipulated in the wiki. It is usable both in [[script tables][#scripts]] and [[dynamic decision tables][#ddt]].
Furthermore it also allows us to ensure Slim show lists as numbered items, instead of comma separated between square brackets (i.e. '[' and ']').

!anchor scripts

!3 Lists in a Script
Here we manipulate lists using [[script tables][.FitNesse.UserGuide.WritingAcceptanceTests.SliM.ScriptTable]].


|script   |list fixture                     |
|add      |Fried                            |
|add      |github@hsac.nl                   |
|check    |value at|0    |Fried             |
|check    |size    |2                       |
|set value|Ivan    |at   |4                 |
|check    |size    |5                       |
|check    |value at|2    |null              |
|check    |value at|3    |null              |
|check    |value at|4    |Ivan              |
|check    |value at|1    |!-github@hsac.nl-!|
|set value|Jan     |at   |1                 |
|check    |value at|1    |Jan               |
|ensure   |element |Ivan |is present        |
|check    |index of|Ivan |4                 |
|check    |index of|Klaas|-1                |
|$list1=  |copy list                        |

!3 Showing Lists as Numbered Items
As seen in the table above Slim's default behavior is to show lists using Java's !style_code[toString()] notation, comma separated between square brackets.
By invoking !-ListFixture-!'s ''display lists numbered'' method we instruct Slim to show lists as HTML ordered lists.
!note This could also be achieved directly in Java code by invoking !style_code[nl.hsac.fitnesse.slim.converter.NumberedListConverter.register()].

|script   |list fixture|
|display lists numbered|
|add      |Fried       |
|set value|Jan  |at |1 |
|$list1=  |copy list   |



!3 List may be nested

|script          |list fixture|
|add             |$list1      |
|add             |$list1      |
|copy values from|$list1      |
|$list2=         |copy list   |

!anchor ddt

!3 Define a List using Dynamic Decision Table
This examples show usage of the fixture in a [[dynamic decision table][.FitNesse.UserGuide.WritingAcceptanceTests.SliM.DynamicDecisionTable]].

Here we define two lists (and store them in Slim variables) using a dynamic decision table. Any output column (header name ending on '?') will receive a copy of the list defined.
|ddt: list fixture                      |
|0    |1             |3    |4   |list?  |
|Jan  |github@hsac.nl|Karel|    |$list3=|
|Karel|Piet          |     |Milk|$list4=|

!3 List as Argument
We don't use lists defined in the current fixture instance, but supply the lists to work on in the rows to the script.

|script          |list fixture                                           |
|check           |value at|1     |in           |$list3|!-github@hsac.nl-!|
|check           |size of |$list3|5                                      |
|check           |value at|2     |in           |$list4|null              |
|check           |value at|3     |in           |$list4|!--!              |
|set value       |Ivan    |at    |3            |in    |$list4            |
|check           |value at|3     |in           |$list4|Ivan              |
|ensure          |element |Ivan  |is present in|$list4                   |
|check           |index of|Ivan  |in           |$list4|3                 |
|copy values from|$list1  |to    |$list4                                 |
|check           |index of|Fried |in           |$list4|5                 |