Foreach
Revision as of 08:13, 28 August 2014 by imported>Odessa (clarified and added external links)
< [[::Category:Functions|Category:Functions]]
A function added by the New Vegas Script Extender.
Description
Added by NVSE V4. Used to repeat a script block for each entry in an array. Each entry is itself a stringmap array with two fields, "key" and "value".
Within foreach loops, the command continue may be used to skip any remaining loop code for that entry, and move on to the next. In the same context, the command break may be used to end the loop immediately, ignoring any remaining code and entries.
Syntax
Foreach entry:array <- set:array
array_var SomeArray array_var Entry foreach Entry <- SomeArray ; Entry["key"] is the key (index) of each entry (0, 1, 2... for lists) ; Entry["value"] is the value of each entry in the array loop
Example
array_var Beatles
array_var Entry
ref rMusician
int iPosition
let Beatles := ar_List JohnREF, PaulREF, GeorgeREF, RingoREF
foreach Entry <- Beatles
let iPosition := Entry["key"]
let rMusician := Entry["value"]
Print "Entry #" + $iPosition + " is " + $rMusician
loop
; Will print in game:
; Entry #0 is John Lennon
; Entry #1 is Paul McCartney
; Entry #2 is George Harrison
; Entry #3 is Ringo Starr
Using continue:
foreach Entry <- Beatles
let rMusician := Entry["value"]
if rMusician.GetDead
continue ; * Go direct to next entry: we ignore dead members
endif
rMusician.AddItem Beer, 1
loop
; Every living member of the Beatles is given a beer
Using break:
foreach Entry <- Beatles
let rMusician := Entry["value"]
if rMusician.GetInWorldSpace Liverpool
rMusician.AddItem Beer, 1
else
break ; * End Loop immediately if we find a member is not in Liverpool
endif
loop
; Give a beer to each member of the Beatles until one is found not to be in Liverpool- assume that all Beatles except Paul are in Liverpool; since Paul is the second entry of the array, only John, the first, gets a beer.
You can also use the Ar_Range command to approximate the traditional 'C' style for loop. The code below prints the numbers 0-10:
foreach entry <- (Ar_Range 0, 10)
Print $entry["value"]
loop