December 2016 - Pharo-users

Re: [Pharo-users] [Pharo-dev] [ANN] Pharo Association has a new Website!

by Marcus Denker

> On 8 Dec 2016, at 15:59, Marcus Denker <marcus.denker(a)inria.fr> wrote: > > >> >>> Accepting Bitcoin payments would be a plus ;-) (https://bitpay.com/tour <https://bitpay.com/tour>) >>> >> > > Hi, > > I have setup bitpay. This means we can now accept bitcoin, to pay by bitcoin, > for now please select âofflineâ payment and then send a mail to > association(a)pharo.org <mailto:association@pharo.org> > > and we will generate a bitcoin invoice. (we can integrate it a bit better later). > Hello, I now - added a link to donate by bitpay to https://association.pharo.org/Donate - added payments links to the invoice that the system generates for paying the membership. Marcus

Dec. 12, 2016

Re: [Pharo-users] real world pharo web application set ups

by Sven Van Caekenberghe

Yes, it is a bit too wide a subject ;-) Anyway, all the cases you find at http://pharo.org/success are successful real-world deployments, but I am sure they are all quite different. > On 12 Dec 2016, at 19:52, Norbert Hartl <norbert(a)hartl.name> wrote: > >> >> Am 12.12.2016 um 19:16 schrieb Volkert <volkert(a)nivoba.de>: >> >> After reading reading "Enterprise Pharo a Web perspective", i am curious to learn more about current real world pharo web application set ups. any case studies or blue prints around? i am interested in application domain, system architecture, infrastructure (HW/OS/DB), performance goals (concurrent users, transactions, ...), system sizing, scalability strategies, .... >> >> everything which could important to convince "me" to select pharo as a platform for a saas solution â¦ >> > What you really want to know? All the things you mentioned above are not pharo related at all! Can you at least roughly sketch in which area you would consider to use pharo? > > Norbert

Dec. 12, 2016

Re: [Pharo-users] real world pharo web application set ups

by Norbert Hartl

> Am 12.12.2016 um 19:16 schrieb Volkert <volkert(a)nivoba.de>: > > After reading reading "Enterprise Pharo a Web perspective", i am curious to learn more about current real world pharo web application set ups. any case studies or blue prints around? i am interested in application domain, system architecture, infrastructure (HW/OS/DB), performance goals (concurrent users, transactions, ...), system sizing, scalability strategies, .... > > everything which could important to convince "me" to select pharo as a platform for a saas solution â¦ > What you really want to know? All the things you mentioned above are not pharo related at all! Can you at least roughly sketch in which area you would consider to use pharo? Norbert

Dec. 12, 2016

real world pharo web application set ups

by Volkert

After reading reading "Enterprise Pharo a Web perspective", i am curious to learn more about current real world pharo web application set ups. any case studies or blue prints around? i am interested in application domain, system architecture, infrastructure (HW/OS/DB), performance goals (concurrent users, transactions, ...), system sizing, scalability strategies, .... everything which could important to convince "me" to select pharo as a platform for a saas solution ... Thanks, Volkert

Dec. 12, 2016

Re: [Pharo-users] accessing local/instance variables with metalinks

by Marcus Denker

Hello, Not yet. It should be easy to add if we find a good API for itâ¦ I will work on it this week (I have blocked some time for RF related hacking). e.g I think we have to extend the syntax for reifications to use classes. something like: arguments: {RFTempReification named: #trachelCanvas}; The current symbols then would be the same as using RFReification named: #object But subclasses can be used directly and parametrized. Marcus > On 5 Dec 2016, at 20:42, Peter Uhnak <i.uhnak(a)gmail.com> wrote: > > Hi, > > what is the best way to access variables from within a metalink? > > for example I have a message send `surface clear` and I want to change it to `surface clear: trachelCanvas color`. > > I can use #instVarNamed: > > ``` > MetaLink new > metaObject: [ :object | > (object instVarNamed: #surface) clear: (object instVarNamed: #trachelCanvas) color. > ]; > selector: #value:; > arguments: #(object); > control: #instead. > ``` > > but the above isn't exactly nice, plus it wouldn't work with temporary variables. > > Thanks, > Peter >

Dec. 12, 2016

Re: [Pharo-users] Contributing code

by Marcus Denker

Hi, We have this description: http://pharo.org/contribute-propose-fix <http://pharo.org/contribute-propose-fix> (linked from http://pharo.org/contribute <http://pharo.org/contribute>) Marcus > On 8 Dec 2016, at 18:15, Evan Donahue <emdonahu(a)gmail.com> wrote: > > Hello, > > I wanted to ask if there was a good resource I could use to learn how to find out about current bugs and submit patches/code/contributions to the core Pharo classes (or other major Pharo projects). I'd like to be able to fix the things I encounter, I've just never gotten around to learning how. > > Ideally, it would be great if something could show me how to find and fix some minor tweak of a comment or something like that, just so I know the process. This seems like the kind of thing that is either obvious, or has been addressed somewhere, but for whatever reason, I've never been able to find it. > > Thank you, > Evan

Dec. 12, 2016

Re: [Pharo-users] A little prototype kernel in 9 methods :)

by serge.stinckwich＠gmail.com

Great works ! I will add some contents for Actalk chapter. BTW I update a little bit the PolyMath book. There was some sections missing. EnvoyÃ© de mon iPhone > Le 11 dÃ©c. 2016 Ã 20:33, stepharong <stepharong(a)free.fr> a Ã©crit : > > Hi guys > > I'm thinking to package some of my language design knowledge in a kind of book. Probably to be used to give a lecture on > OOP languages. I have class-based reflective kernel. This is several years that I was thinking about prototype kernels > and I decided to relax and implement one for fun over the week-end. > I will probably look at mixins, traits, talents, split objects in the future. > > Since I cannot compile the book on jenkins, I join the pdf. > > Stef > > PS: I will finish Pharo by example now and focus on Learning OOP with Pharo. > > -- > Using Opera's mail client: http://www.opera.com/mail/ > <book.pdf>

Dec. 11, 2016

A little prototype kernel in 9 methods :)

by stepharong

Hi guys I'm thinking to package some of my language design knowledge in a kind of book. Probably to be used to give a lecture on OOP languages. I have class-based reflective kernel. This is several years that I was thinking about prototype kernels and I decided to relax and implement one for fun over the week-end. I will probably look at mixins, traits, talents, split objects in the future. Since I cannot compile the book on jenkins, I join the pdf. Stef PS: I will finish Pharo by example now and focus on Learning OOP with Pharo. -- Using Opera's mail client: http://www.opera.com/mail/

Dec. 11, 2016

Re: [Pharo-users] seaside javascript builders

by Siemen Baader

Thanks, that was very helpful! Siemen Sent from my iPhone On 09/12/2016, at 19.45, "phil(a)highoctane.be" <phil(a)highoctane.be> wrote: > I guess that's where passengers: come handy. > > Because what you pass can be the result of a jQuery. > > TBH sometimes it is easier to do a JSStream on: 'some js code that does what you want' instead of wondering for ages how to do the same with the Javascript classes, subclasses and methods. > > Look into the test packages for lots of examples. That helped me. > > Phil > > On Fri, Dec 9, 2016 at 2:20 PM, Siemen Baader <siemenbaader(a)gmail.com> wrote: >> Hi all, >> >> I'm confused about the limitations and intended use of Seaside's javascript >> builders. I can follow that we can do eg: "(html jQuery: 'div') remove" or >> "html javascript alert: 'hello'" within the "renderContentOn: html" methods, >> but how do I deal with logic and variables? How do I eg. install an event >> listener and provide a browser-side function that extracts data from the >> event and then passes it to the server via "html jQuery ajax"? >> >> Is this something to be done in pure JS returned from the #script method? >> >> Thanks for any enlightenment! >> >> Siemen >> >> >> >> -- >> View this message in context: http://forum.world.st/seaside-javascript-builders-tp4926336.html >> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >

Dec. 10, 2016

Re: [Pharo-users] Hash collision

by Martin McClure

On 12/09/2016 09:45 AM, Ben Coman wrote: > > The suggested fix depended on being willing to let go of byte ordering > (which we might not want different results on different platforms) > Float>>hash > ^ByteArray > hashBytes: self > startingWith: self species hash This fix contains a good idea, but has at least two problems: 1) The check for integers is important, that's what makes sure that 1.0 has the same hash as 1. Which it must, since they compare equal. 2) #hashBytes:startingWith: is designed to hash *bytes*. A BoxedFloat64 is two *words*, which ensures that when you hashMultiply the high-order bits of each word get discarded. I tried implementing a hash that actually uses the bytes of the float (code at bottom of this message). I didn't do any real analysis of it, but at least it gives different answers for 0.5 and -0.5. I think it matches the *intent* of the code above (though would still need the integer check, which I didn't bother with). > > but anyway that doesn't actually help this case... > -0.5 hash "==>120484352" > 0.5 hash "==>120484352" > > I see Squeak5's float hash has changed... > Float>>hash "Squeak5" > (self isFinite and: [self fractionPart = 0.0]) ifTrue: [^self > truncated hash]. > ^ ((self basicAt: 1) bitShift: -4) + > ((self basicAt: 2) bitShift: -4) > This is slightly better. It's only discarding eight bits out of 64, instead of discarding 32. But it would be better to mix all the bits into the hash. Note that all of these hash implementations end up manipulating at least one large integer most of the time, since each word can be a large integer. It's possible that a primitive to copy a word object into the equivalent bytes might speed things up somewhat. Regards, -Martin "Strictly experimental method on BoxedFloat64, could probably be made faster even without a primitive." bytesHash | bytes word1 word2 | bytes := ByteArray new: 8. word1 := self basicAt: 1. word2 := self basicAt: 2. bytes at: 1 put: (word1 bitShift: -24). bytes at: 2 put: ((word1 bitShift: -16) bitAnd: 16rFF). bytes at: 3 put: ((word1 bitShift: -8) bitAnd: 16rFF). bytes at: 4 put: (word1 bitAnd: 16rFF). bytes at: 5 put: (word2 bitShift: -24). bytes at: 6 put: ((word2 bitShift: -16) bitAnd: 16rFF). bytes at: 7 put: ((word2 bitShift: -8) bitAnd: 16rFF). bytes at: 8 put: (word2 bitAnd: 16rFF). ^ ByteArray hashBytes: bytes startingWith: self class hash

Dec. 10, 2016