Scratch

Just replace an existing method completely (so with a new name too). It should make a new one, and not over-write the old one (keeping both).

jslomba wrote:

you have to know how to code in squeak. try Scramble, made by hardmath123. that should help you get started.

I know enough.  The block I'm trying to code is actually very simple:  going to the midpoint in between two coordinates, like this:

go in between x: () y: () and x: () y: ()

(Sorry if somebody has already done this, but I want to do it on my own.)

The blockspec would be:

 ('go in between x: %n y: %n and x: %n y: %n' #- #(my method here, without parentheses))

I think the code would be something like this:

 
| x1 y1 x2 y2 newX newY |
x1_ self reportVar: t1.
y1_ self reportVar: t2.
x2_ self reportVar: t3.
y2_ self reportVar: t4.
newX_ (x1 + x2) / 2.
newY_ (y1 + y2) / 2.
self referencePosition: newX @ newY

But since I'm new, that might be completely wrong.  Is it?

Maybe I should've been more descriptive. Actually navigate to some random method (right place, wrong name) and replace that entire code including title.

Then you can code your own stuff into it.

jslomba wrote:

use this:

blockspec

Code:

('go in between x: %n y: %n and x: %n y: %n' #- #betweenX:Y:X:Y: '-10' '0' '10' '0')

code:

Code:

betweenX: t1 Y: t2 X: t3 Y: t4
| newX newY |

newX_ (t1 + t2) / 2.
newY_ (t3 + t4) / 2.
self referencePosition: newX @ newY

Thanks.  Was there anything wrong with mine?  If there was, I would like to know so I can learn.  Or is your just a simplified version?

EDIT:  t2 and t3 need to be swapped.
EDIT AGAIN: It won't accept it.  "Nothing more expected" appears between newY and arrow.
THIRD EDIT:  Ignore the second edit.  I forgot the periods.   

Last edited by Greenatic (2011-06-25 17:45:01)

There's a problem.  I edited my last message because I didn't expect you to reply so quickly (therefore I wouldn't need this message to respond).  Check my last message, under "EDIT AGAIN".

EDIT:  Never mind, I forgot the periods after some lines.

Last edited by Greenatic (2011-06-25 17:44:06)

Greenatic wrote:

By the way, jslomba, I posted the new block in the Block Library with credit to both of us.  I hope you don't mind.

that's fine!

you have to press 'enetr' after each command.

do this:

[t1 > 1] whileTrue:[answer_answer*t1 ].
[t1 > 1] whileTrue:[t1_t1-1].

jslomba wrote:

do this:

Code:

[t1 > 1] whileTrue:[answer_answer*t1 ].
[t1 > 1] whileTrue:[t1_t1-1].

I just tried yours to see whether it would work.  It created a forever loop that froze scratch and sent my CPU crazy.  I had to end the task in Task Manager.

oh yeah, you can just add periods after each command XD

Please, can someone help me???  Please???

t1 is a input.
A input can NOT be changed.
The code: t1_t1-1
needs to be adapted. Try this:

Factorial: t10 
    | t1 answer |
t1_ t10.
    answer_ 1.
    t1 = 0 ifTrue:[^1].
    t1 < 0 ifTrue:[^0].
    t1 isInf ifTrue:[^0].
        t1 isNaN ifTrue:[^0].
    [t1 > 1] whileTrue:[answer_answer*t1. t1_t1-1].
    ^ answer