Method New Parameters
BlitzMax Forums/BlitzMax Programming/Method New Parameters
| ||
| Is there a way to pass parameters through the new method of an object? ex: Type TTest Field Name:String Method New(Name:String) Self.Name = Name End Method End Type Local aTest:TTest = New TTest |
| ||
| Sadly, no. I use an aditional "Init" method for this stuff. Also, I use the "New" method to create TLists and such, not to configure the new created instance. |
| ||
Type TTest
Field Name:String
Method Create:TTest(Name:String)
Self.Name = Name
Return Self
End Method
End Type
Local aTest:TTest = New TTest.Create("a name")
|
| ||
you don't need to use new in the declaration:
Local aTest:TTest = TTest.Create("a name")
|
| ||
| Yes you do because Create is a method, not a function. |
| ||
| you are right. my fault. But why would you want to make it a method? if you make it a function you wouldn't need to add "New". to me it seems to be creating an instance of ttest at the line and calling the method to create another instance of it. the same as this:
Local aTest:TTest = (New TTest).Create("a name")
which is somewhat redundant. |
| ||
| If you inherit objects, they will call all their News in order. However, New can't take any parameters, and Create as a function will create a new object, so you can't use a base type's create to finish setting up a derived type which you just created using its own create function. As a method, you can "chain" the creates, however. There is no redundant creation of objects too. Strict
Type TBase
Field top:String
Method Create:TBase(init:String)
top = init
Return Self
End Method
End Type
Type TDerived Extends TBase
Field bottom:String
Method sub_create:TDerived(more_init:String)
bottom = more_init
Return Self
End Method
End Type
Local something:TBase = New TDerived.sub_create("I am bottom").Create("I am top")This particular example has the oddity that the derived create is called before the base one. In many cases the order won't matter (but not all). It would be a bit more tricky to do this using create functions. Derived create methods should be given a unique name (edit: compared to the base type's create method). Personally I prefer the function way, but sometimes I have no choice but to use the method way. |
| ||
| wow! I just learned something new. I guess That is what happens when one never went to school for things like this. |
| ||
| Don't worry, I learnt more about programming on these forums and with BlitzMax than I ever did at university. |
   |