7 replies to this topic

[morbeo]

I didn't manage to find proof for otherwise, but the default functions doesn't accept parameters. For example:

turtle.forward(3) would move 3 and so on.

Is there something I am missing or that is not implemented? One easy API would most likely add that, but wouldn't it be better for everyone if it is native?

[bjornir90]

I think that work but as I can't test it you can do that :

a = 0
While a <= 3 do 
turtle.forward()
a = a+1
end

[billysback]

or:

for i=1,3 do turtle.forward() end

however, there are several programs/APIs which add different ways or shortened ways of moving turtles around.

[morbeo]

Well, yes, there are brazzilion ways to make such a loop and do stuff, but I'm inquiring about native support of parameters. And it's not just about the movement of the turtle. A lot of functions can use a parameter.

[Lyqyd]

This is not implemented and it would be bad if it were. The current system uses a Boolean return value to indicate success or failure of the movement attempt. Changing the behavior to loop with a parameter means also changing the return values, which means that the niceness of shortening a quick for loop down to a single line is offset by having to figure out where exactly in that movement the movement failed, etc. This would not be a useful change. You could always create a quick API to wrap the turtle movements in a for loop if you really want.

[billysback]

you could made it return two values so you could still use it normally:
return success, n_before_failure

where success is whether or not the turtle finished it's movement and
n_before_failure is -1 if success = true or the number of times it moves until it failed.

[Cloudy]

Nah. If you want this create it yourself - not going to get into CC.

[morbeo]

Lyqyd, on 11 November 2012 - 07:12 AM, said:

This is not implemented and it would be bad if it were. The current system uses a Boolean return value to indicate success or failure of the movement attempt. Changing the behavior to loop with a parameter means also changing the return values, which means that the niceness of shortening a quick for loop down to a single line is offset by having to figure out where exactly in that movement the movement failed, etc. This would not be a useful change. You could always create a quick API to wrap the turtle movements in a for loop if you really want.

I think I get what you mean that it complicates the code. Thank you all for the answers.