difference between number variables

[coenzyme]

I am trying to find the difference between 2 variables.

Say I have one variable which has a value of 10 and a second variable that has a value of 12.

The code:

Code: Select all

Subtract variable1 from variable2

does not work.

I just need variable2 or a third variable to contain the difference. In the above case I would like a variable containing 2.

Is there a function that compares two variable and returns the difference?

[Dixie]

Code: Select all

on mouseUp
   put 10 into var1
   put 12 into var2
   put var2 - var1 into theanswer
   
   put theanswer
end mouseUp

[Klaus]

Hi coenzyme,

"does not work" ERROR: Invalid error description!

Hm, just made a test with a button:

Code: Select all

on mouseUp
   put 10 into variable1
   put 12 into variable2
   Subtract variable1 from variable2
   put variable2
end mouseUp

gives me 2 in the message box, so this definitively works!
Could you please post the rest of your script(s)?


Best

Klaus

[coenzyme]

Easy enough. Thanks!!

[magice]

I love writing functions. This will give you the difference regardless of which variable is higher.

Code: Select all

function compareVariables x y
  If x>y 
   then
    put x-y into tResult
   else
    put y-x into tResult
  end if
return tResult
end CompareVariables

[coenzyme]

I am comparing two times

so when the card opens I have the code

Code: Select all

On cardOpen
get the seconds
put it into tStart
end cardOpen

I then have a button with the code in that card:

Code: Select all

On mouseUp
get the seconds
put it into tClick
Subtract tClick from tStart
End mouseUp

I am trying to find the time elapsed between the card opening and when the user clicks the button.

I am not with my code and I don't remember the error, but I can look it up when I get home.

[magice]

I think your problem is variable persistence. Look up global and local in the dictionary.

[Klaus]

AHA!
What magice says!

Do this in the card script:

Code: Select all

global tStart

## Actually it is: OPENCARD
On opencard

  ## No need to GET anything, you can put everything directly into a variable!
  put the seconds into tStart
end opencard

and this in your button(s):

Code: Select all

global tStart
On mouseUp
  put the seconds into tClick
  Subtract tClick from tStart
End mouseUp

If you do not define a variable as either LOCAL or GLOBAL, it will be gone after your handler has finished.


Best

Klaus

[dunbarx]

Magice,

You can also use your handler with the "abs" function, just to make it a bit shorter:

Code: Select all

function compareVariables x y
 return abs(x-y)
end CompareVariables

[magice]

Magice,

You can also use your handler with the "abs" function, just to make it a bit shorter:

Code: Select all

function compareVariables x y
 return abs(x-y)
end CompareVariables

You just took all the fun out of it

[Klaus]

You have a real strange idea of fun!

[[-hh]]

..........

[dunbarx]

Klaus.

I completely get what Magice meant. Jacque has been doing this sort of thing to me for 25 years.

Craig

[magice]

You have a real strange idea of fun!

Sometimes it's fun to reinvent the wheel, just like an artist copying the works of the masters or a musician covering someone else song. Then again, I think a clock with the gears on the outside is more fun than one with them on the inside, and I like hot rods that leave the hood off so you can see the engine, so maybe I am just strange.

[jacque]

Klaus.

I completely get what Magice meant. Jacque has been doing this sort of thing to me for 25 years.

Craig

Only because you're such a good sport about it. May we have 25 more.