On 01.02.2012, at 13:53, Bert Freudenberg wrote:

On 01.02.2012, at 13:24, Steve Thomas wrote:

...

Folks,

I am trying to create a project where kids can enter their own "Connector" functions.

So what I want to do is given a connector connected to two text boxes (one Enhanced Text, so I can execute a script when they hit <CR> or on <focus loss>). I have a string variable defined for the connector, in which the kids can enter a function like ( D = S + 25) Where D maps to DestinationPlayer and S maps to SourcePlayer.

Ideally I would like to generate the below script and execute it:

doIt self getDestinationPlayer setNumericValue: self getSourcePlayer getNumericValue + 25

Need some squeak coding help on this. I guess specifically, assuming I can figure out how to create a string with the correct code ... How do I "do it" to the string?

Compiler evaluate: '3 + 4'

• Bert -

... and to be a bit less brief, a simple way to introduce variables is compiling a block:

(Compiler evaluate: '[:a :b | a + b ]') value: 3 value: 4

Also see attached your project, enhanced.

[I'd get rid of the D and S and the assignment, just have the kids enter "x + 25". Makes the veal code simpler. Also, watch out for "3 + 4 * 5" having not the same result as when using Etoys tiles. The way around that would be to implement an actual grammar for your functions, not just re-use the Smalltalk grammar]

- Bert -