Purpose of ListToArray

BlitzMax Forums/BlitzMax Beginners Area/Purpose of ListToArray

ghislain

(Posted 2006) [#1]

The function 'ListToArray' seems so limited in its use.

local list:tlist = new tList

for local i:int = 1 to 5
 list.addlast ("Apple Rules!")
next

local arrayS:string[] = string[] (list.toArray())
' Result: arrayS=Null

local arrayO:object[ = list.toArray()
' string( arrayO[0] ) works fine

Is it supposed to work like this?
Or is it somehow possible to convert the list directly in a string[]?

Ghislain
MacIntel OsX 10.4.7

Dreamora

(Posted 2006) [#2]

It is supposed to work like this (return Array of Object -> :object[])

There is no way to directly return anything. Everytime you access the list, you have to cast object -> type as BM is a typesafe language so if you want to have an array of strings you have to cast all objects and add all objects that are actually strings to your string array.

ghislain

(Posted 2006) [#3]

I wish

string[] (list.toArray())

would generate an Array with all the strings included in the list. I think that would be quite usefull.
Probably not that difficult as well..

You could leave

object[] (list.toArray())

for the cases you require objects...

Ghislain
MacIntel OsX 10.4.7

tonyg

(Posted 2006) [#4]

I must be missing something.
Take the ToArray code and change the object to a string.

Function tostringarray:String[](mylist:TList)
	Local n=mylist.count(),arr:String[n],i:Int
	For Local o:String=EachIn mylist
		arr[i]=o
		i:+1
	Next
	Return arr
End Function

Azathoth

(Posted 2006) [#5]

I'm sure some early versions could cast an entire array because some of my sourcecodes used it and it was only in later versions they stopped working.