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whileTrue works different in Amber than in Pharo?

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Bernat Romagosa

whileTrue works different in Amber than in Pharo?

Hi list,

| a |

[ a := 3 ] valueWithTimeout: 500.

[ a isNil ] whileTrue.

This freezes the page, unlike the (I think) equivalent in Pharo:

|a|

[ (Delay forMilliseconds: 500) wait. a := 3 ] fork.

[ a isNil ] whileTrue.

Which waits for a to not be nil and ends.

Any ideas?

Cheers!

--
Bernat Romagosa.

Ankh'nAton

Re: whileTrue works different in Amber than in Pharo?

Hi,

I don't know for sure, but it looks like a scope problem. Maybe local
variables in Amber cannot be addressed from within blocks?

Cheers...

Denis Kudriashov

Re: whileTrue works different in Amber than in Pharo?

In reply to this post by Bernat Romagosa

Is #fork really works in Amber?

2011/12/27 Bernat Romagosa <[hidden email]>

Hi list,

| a |
[ a := 3 ] valueWithTimeout: 500.
[ a isNil ] whileTrue.

This freezes the page, unlike the (I think) equivalent in Pharo:

|a|
[ (Delay forMilliseconds: 500) wait. a := 3 ] fork.
[ a isNil ] whileTrue.

Which waits for a to not be nil and ends.

Any ideas?

Cheers!

--
Bernat Romagosa.

Bernat Romagosa

Re: whileTrue works different in Amber than in Pharo?

No, #fork doesn't exist in Amber, that was the equivalent code in Pharo :)

It seems to be the normal behavior in Javascript, so I'm afraid there may be no solution to get this to work in Amber.

2011/12/30 Denis Kudriashov <[hidden email]>

Is #fork really works in Amber?

2011/12/27 Bernat Romagosa <[hidden email]>

Hi list,

| a |
[ a := 3 ] valueWithTimeout: 500.
[ a isNil ] whileTrue.

This freezes the page, unlike the (I think) equivalent in Pharo:

|a|
[ (Delay forMilliseconds: 500) wait. a := 3 ] fork.
[ a isNil ] whileTrue.

Which waits for a to not be nil and ends.

Any ideas?

Cheers!

--
Bernat Romagosa.

--
Bernat Romagosa.

Nicolas Petton

Re: whileTrue works different in Amber than in Pharo?

In reply to this post by Denis Kudriashov

On Fri, 2011-12-30 at 09:17 +0400, Denis Kudriashov wrote:
> Is #fork really works in Amber?

Nope, it's not at all in Amber. And #valueWithTimeout: doesn't work the
same way. BTW, the same is true with JavaScript:

var a;
setTimeout(function() {a = 3}, 500);
while(!a) {"oops"};

Cheers,
Nico

>
> 2011/12/27 Bernat Romagosa <[hidden email]>
> Hi list,
>
>
> | a |
> [ a := 3 ] valueWithTimeout: 500.
> [ a isNil ] whileTrue.
>
>
> This freezes the page, unlike the (I think) equivalent in
> Pharo:
>
>
> |a|
> [ (Delay forMilliseconds: 500) wait. a := 3 ] fork.
> [ a isNil ] whileTrue.
>
>
> Which waits for a to not be nil and ends.
>
>
> Any ideas?
>
>
> Cheers!
>
>
> --
> Bernat Romagosa.
>
>

Amber Milan Eskridge

Re: whileTrue works different in Amber than in Pharo?

Maybe it would be possible to implement that with WebWorkers[1]? I believe not with considerable effort and even then only with introduced complexity to the overall system.

[1] http://en.wikipedia.org/wiki/Web_worker

On Mon, Jan 2, 2012 at 6:30 PM, Nicolas Petton <[hidden email]> wrote:

On Fri, 2011-12-30 at 09:17 +0400, Denis Kudriashov wrote:
> Is #fork really works in Amber?

Nope, it's not at all in Amber. And #valueWithTimeout: doesn't work the
same way. BTW, the same is true with JavaScript:

var a;
setTimeout(function() {a = 3}, 500);
while(!a) {"oops"};

Cheers,
Nico

>
> 2011/12/27 Bernat Romagosa <[hidden email]>
> Hi list,
>
>
> | a |
> [ a := 3 ] valueWithTimeout: 500.
> [ a isNil ] whileTrue.
>
>
> This freezes the page, unlike the (I think) equivalent in
> Pharo:
>
>
> |a|
> [ (Delay forMilliseconds: 500) wait. a := 3 ] fork.
> [ a isNil ] whileTrue.
>
>
> Which waits for a to not be nil and ends.
>
>
> Any ideas?
>
>
> Cheers!
>
>
> --
> Bernat Romagosa.
>
>

Denis Kudriashov

Re: whileTrue works different in Amber than in Pharo?

Web workers are like native OS threads support for usual smalltalk system.
Is it possible to implement green threads in amber?

2012/1/4 Amber Milan Eskridge <[hidden email]>

Maybe it would be possible to implement that with WebWorkers[1]? I believe not with considerable effort and even then only with introduced complexity to the overall system.

[1] http://en.wikipedia.org/wiki/Web_worker

On Mon, Jan 2, 2012 at 6:30 PM, Nicolas Petton <[hidden email]> wrote:

On Fri, 2011-12-30 at 09:17 +0400, Denis Kudriashov wrote:
> Is #fork really works in Amber?

Nope, it's not at all in Amber. And #valueWithTimeout: doesn't work the
same way. BTW, the same is true with JavaScript:

var a;
setTimeout(function() {a = 3}, 500);
while(!a) {"oops"};

Cheers,
Nico

>
> 2011/12/27 Bernat Romagosa <[hidden email]>
> Hi list,
>
>
> | a |
> [ a := 3 ] valueWithTimeout: 500.
> [ a isNil ] whileTrue.
>
>
> This freezes the page, unlike the (I think) equivalent in
> Pharo:
>
>
> |a|
> [ (Delay forMilliseconds: 500) wait. a := 3 ] fork.
> [ a isNil ] whileTrue.
>
>
> Which waits for a to not be nil and ends.
>
>
> Any ideas?
>
>
> Cheers!
>
>
> --
> Bernat Romagosa.
>
>

Amber Milan Eskridge

Re: whileTrue works different in Amber than in Pharo?

Not without significantly changing (and slowing down) Amber, since Amber is a transpiled system and not an interpreted one, IMHO.

On Wed, Jan 4, 2012 at 11:34 AM, Denis Kudriashov <[hidden email]> wrote:

Web workers are like native OS threads support for usual smalltalk system.
Is it possible to implement green threads in amber?

2012/1/4 Amber Milan Eskridge <[hidden email]>

Maybe it would be possible to implement that with WebWorkers[1]? I believe not with considerable effort and even then only with introduced complexity to the overall system.

[1] http://en.wikipedia.org/wiki/Web_worker

On Mon, Jan 2, 2012 at 6:30 PM, Nicolas Petton <[hidden email]> wrote:

On Fri, 2011-12-30 at 09:17 +0400, Denis Kudriashov wrote:
> Is #fork really works in Amber?

Nope, it's not at all in Amber. And #valueWithTimeout: doesn't work the
same way. BTW, the same is true with JavaScript:

var a;
setTimeout(function() {a = 3}, 500);
while(!a) {"oops"};

Cheers,
Nico

>
> 2011/12/27 Bernat Romagosa <[hidden email]>
> Hi list,
>
>
> | a |
> [ a := 3 ] valueWithTimeout: 500.
> [ a isNil ] whileTrue.
>
>
> This freezes the page, unlike the (I think) equivalent in
> Pharo:
>
>
> |a|
> [ (Delay forMilliseconds: 500) wait. a := 3 ] fork.
> [ a isNil ] whileTrue.
>
>
> Which waits for a to not be nil and ends.
>
>
> Any ideas?
>
>
> Cheers!
>
>
> --
> Bernat Romagosa.
>
>