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Davide Arrigo

fromString: method

Hy all, I worder if there's something like this: Block fromString:
aString in Squeak, like the example below taken from SmallTalk/X
programmers guide.

|s b|

s := '[:a :b | (a squared + b squared) sqrt ]'.
b := (Block fromString:s).
Transcript showCR:(b value:3 value:4)

I need to get a Block of code from an input field like TextMorph in a
GUI. I haven't found nothing like this in my squeak-dev image 3.10. Is
there another way to obtain am evaluable Block of code from a string?
Many thanks
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Davide Arrigo
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Bert Freudenberg

Re: fromString: method

On 24.05.2008, at 12:47, Davide Arrigo wrote:

> Hy all, I worder if there's something like this: Block fromString:
> aString in Squeak, like the example below taken from SmallTalk/X
> programmers guide.
>
> |s b|
>
> s := '[:a :b | (a squared + b squared) sqrt ]'.
> b := (Block fromString:s).
> Transcript showCR:(b value:3 value:4)
>
> I need to get a Block of code from an input field like TextMorph in a
> GUI. I haven't found nothing like this in my squeak-dev image 3.10. Is
> there another way to obtain am evaluable Block of code from a string?

| s b |
s := '[:a :b | (a squared + b squared) sqrt ]'.
b := Compiler evaluate: s.
Transcript show: (b value: 3 value: 4); cr.

This will work for any expression in a String, not just blocks.

- Bert -

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Davide Arrigo

Re: fromString: method

..........

> >
> > |s b|
> >
> > s := '[:a :b | (a squared + b squared) sqrt ]'.
> > b := (Block fromString:s).
> > Transcript showCR:(b value:3 value:4)
> >
> > I need to get a Block of code from an input field like TextMorph in a
> > GUI. I haven't found nothing like this in my squeak-dev image 3.10. Is
> > there another way to obtain am evaluable Block of code from a string?
> >
>
>
> | s b |
> s := '[:a :b | (a squared + b squared) sqrt ]'.
> b := Compiler evaluate: s.
> Transcript show: (b value: 3 value: 4); cr.
>
> This will work for any expression in a String, not just blocks.
>
> - Bert -

Great!! many thanks Bert it work fine.
Best regards
--
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Davide Arrigo
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