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If I create a text string which contains squeak code, how can I execute it from within a script?

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Steve Thomas

If I create a text string which contains squeak code, how can I execute it from within a script?

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?

Thanks,

Stephen

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ConnectorMath.001.pr (126K) Download Attachment

Bert Freudenberg

Re: If I create a text string which contains squeak code, how can I execute it from within a script?

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 -

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Karl Ramberg

Re: If I create a text string which contains squeak code, how can I execute it from within a script?

In reply to this post by Steve Thomas

On Wed, Feb 1, 2012 at 10:24 PM, Steve Thomas <[hidden email]> 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?
>
> Thanks,
> Stephen
>
> _____

I have also wanted a enhanced workspace where one evaluate a line with
enter/return.
Workspaces create textual references to dropped morphs, see workspace
window menus.
That way you can keep track of many morphs on screen.
Evaluation is done by select and Ctr l+ D

Karl
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Bert Freudenberg

Re: [squeakland] If I create a text string which contains squeak code, how can I execute it from within a script?

In reply to this post by Bert Freudenberg

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 -

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ConnectorMath.002.pr (67K) Download Attachment

Steve Thomas

Re: [squeakland] If I create a text string which contains squeak code, how can I execute it from within a script?

Thanks 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]

Good idea. I made the changes and am playing around with Compiler evaluate.

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