Roku BrightSign Manual do Utilizador descarregar pdf (Página 21)

roInt, roFloat, roString

The intrinsic types rotINT32, rotFLOAT, and rotSTRING have an object and interface equivalent. These

are useful in the following situations:

• When an object is needed, instead of a typed value. For example, roList maintains a list of

objects.

• If any object exposes the ifInt, ifFloat, or ifString interfaces, that object can be used in any

expression that expects a typed value. For example, in this way an roTouchEvent can be used as

an integer whose value is the userid of the roTouchEvent.

Notes:

• If o is an roInt, then the following statements have the following effects

1. print o ‘ prints o.GetInt()

2. i%=o ‘ assigns the integer i% the value of o.GetInt()

3. k=o ‘presumably k is typeOmatic, so it becomes another reference to the roInt o

4. o=5 ‘this is NOT the same as o.SetInt(5). Instead it releases o, and

‘changes the type of o to rotINT32 (o is typeOmatic). And assigns it to 5.

roInt contains one interface:

• ifInt

rotINT32 GetInt()

rotVOID SetInt(rotINT32 value)

roFloat contains one interface:

• ifFloat

rotFLOAT GetFloat()

rotVOID SetFloat(rotFLOAT value)

roString contains one interface:

• ifString

rotSTRING GetString()

rotVOID SetString(rotSTRING value)

Example:

BrightScript> o=CreateObject("roInt")

BrightScript> o.SetInt(555)

BrightScript> print o

555

BrightScript> print o.GetInt()

555

BrightScript> print o-55

500

Yet Another Example. The function ListDir() returns an object roList of roString’s.

BrightScript> l=ListDir("/")

BrightScript> for i=1 to l.Count():print l.RemoveHead():next

test_movie_3.vob

test_movie_4.vob

test_movie_1.vob

test_movie_2.vob

1 2 ... 16 17 18 19 20 21 22 23 24 25 26

Sem comentários

Roku BrightSign Manual do Utilizador Página 21