May 2019 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Bloc of code in tiers programming language

by Brainstorms

Richard O'Keefe wrote > I did not mean "course of instruction on the topic of continuations", > I meant "that class whose name is Continuation in the Smalltalk image." > In a Playground, type Continuation and then Control-B. Of course... My inexperience again, coupled with hopes for a course of instruction with examples. However, the browser and source code are sufficient, and I do need to read more ST code. Having read your answers to others' questions, I'm impressed with the depth of your knowledge and your eloquence (and patience) in explaining the concepts and techniques. The level of detail, examples, and notes on usage are what I've been looking for. -t -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 17, 2019

Re: [Pharo-users] can I do this with a stream or a format

by Esteban Maringolo

The good thing about these exercises is that you know about new selectors, I didn't know there was an #allButLast and #allButLastDo:. Regards, Esteban A. Maringolo On Fri, May 17, 2019 at 5:44 AM Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > I would make that > > ^ String new: gifts size * 10 streamContents: [ :stream | > gifts allButLastDo: [:each | > stream nextPutAll: each; nextPutAll: ', ']. > stream nextPutAll: 'and '; nextPutAll: gifts last ] > > Your iteration is well done, clear and to the point. > > > On 17 May 2019, at 02:44, Richard O'Keefe <raoknz(a)gmail.com> wrote: > > > > stream := WriteStream on: (String new: gifts size * "estimated size per > gift" 10). > > "The number after #new: is the *initial* allocation; the stream will > reallocate it > > as needed." > > gifts allButLastDo: [:each | > > stream nextPutAll: each; nextPutAll: ', ']. > > stream nextPutAll: 'and '; nextPutAll: gifts last. > > ^stream contents > > Using #allButLastDo: saves making a copy of (most of) gifts. > > How could you find out about these things? > > > > You want to join some strings, so you look for a "join" method in String > and you > > will find > > > > join: aCollection > > ^ self class new: (aCollection size * self size) streamContents: > [:stream | > > aCollection > > do: [:each | stream nextPutAll: each asString] > > separatedBy: [stream nextPutAll: self]] > > > > > > You might wonder if there is already something close to what you want, > so you > > might enter "commas" into Spotter. If you did that, you would find > > Collection>>asCommaStringAnd so that the whole thing is very nearly > > gifts asCommaStringAnd > > > > Just as the concatenation selector #, works with most kinds of sequences, > > so building sequences up using a WriteStream works with most kinds of > sequences. > > > > Let's work through a little example. We are just going to build up the > string > > 'Quick' one character at a time. > > s := ''. > > s := s , 'Q'. "creates a new string holding 'Q'" > > s := s , 'u'. "creates a new string holding 'Qu'" > > s := s , 'i'. "creates a new string holding 'Qui'" > > s := s , 'c'. "creates a new string holding 'Quic'" > > s := s , 'k'. "creates a new string holding 'Quick'" > > > > You see that building a string of n characters will actually create n > new strings, > > all but the last of which will be thrown away, taking O(n**2) time. > > > > Now let's use a stream. > > w := WriteStream on: (String new: 4). "Yes, I know that's too small." > > w nextPutAll: 'Q'. "The stream now holds 'Q...' in its buffer." > > w nextPutAll: 'u'. "The stream now holds 'Qu..' in its buffer." > > w nextPutAll: 'i'. "The stream now holds 'Qui.' in its buffer." > > w nextPutAll: 'c'. "The stream now holds 'Quic' in its buffer." > > s nextPutAll: 'k'. "There is no room left in the buffer, so the stream > allocates > > a new buffer twice the size and copies the old one > into it. > > Now it has 'Quic....' and it has room. > > The stream now holds 'Quick...' in its buffer." > > s := w contents. "We are asking for the defined elements of the buffer. > > This means s := buffer copyFrom: 1 to: w position." > > > > You see that building a string of n characters this way requires a > minimum of > > two strings, the buffer and the final result. The buffer may be > periodically > > resized, but growing by doubling means the average cost is still O(n). > > > > Let's time these to get an idea. > > Time millisecondsToRun: [ > > |s| > > s := ''. > > 1 to: 10000 do: [:i | > > s := s , i printString]. > > s size] > > => 124 > > Time millisecondsToRun: [ > > |w| > > w := WriteStream on: (String new: 10000). > > 1 to: 10000 do: [:i | > > w nextPutAll: i printString]. > > w contents size] > > => 7 > > > > This is exactly the reason that Java has both String and StringBuilder. > > The tragedy of Java (well, not the only one) is that they had the example > > of Smalltalk before them, showing very very clearly that the best way to > > handle object to text conversion is to use #printOn: as the primitive, > > not #printString, and they *still* went ahead and did the worse thing. > > (Ruby has even less excuse for privileging to_s.) > > > > There are quite a few books about Smalltalk available as free PDFs from > > the Pharo web site, a wonderful resource. The Blue Book (Smalltalk-80 > > The Language and its Implementation) describes streams in Chapter 12. > > > > > > On Fri, 17 May 2019 at 07:21, Roelof Wobben <r.wobben(a)home.nl> wrote: > > Hello, > > > > Im testing all my solutions with critiz and can solve almost all > problems, > > > > Only this one I cannot figure out. > > > > I have this code > > (gifts allButLast > > inject: '' > > into: [ :str :each | str , each , ', ' ]) , 'and ' , > gifts last ] > > > > and critiz says I should use a stream . > > > > How can I make this work ? > > > > Roelof > > > > > > >

May 17, 2019

[ANN] Next Pharo Sprint: May 24

by Marcus Denker

We will organize a Pharo sprint / Moose dojo May 24, starting at 10:00am. (Local Time Paris). Goals of this sprint: - Pharo 8: Fix issues from tracker https://github.com/pharo-project/pharo/issues Remote Sprint: Remotely, you can join us on Discord. During the sprint, we synchronize local and remote Pharo sprinters: http://pharo.org/contribute-events We have added a Board to coordinate the work: https://github.com/orgs/pharo-project/projects/9 Known Local Sprint meetings Lille/France: It will be at the Inria Lille, Building B, third floor (RMoD offices). As the building is not open to the public, please contact us before if you plan to come

May 17, 2019

Re: [Pharo-users] Small query about ZnClient post - with "; " form values

by Sven Van Caekenberghe

> On 17 May 2019, at 13:17, Tim Mackinnon <tim(a)testit.works> wrote: > > Thanks Sven - Iâll ping the guy at dpaste and ask - I was just curious if I was missing something obvious in encodingâ¦ his docs are sparse. > > Muy point about stfx vs dpaste is that the latter uses one of those js syntax highlighting libraries (not sure what you use) and so you get something that looks quite nice (not knocking stfx but maybe it could use one of them too) ws.stfx.eu uses https://highlightjs.org > - but more critically (for me trying to help exercism users communicate on this forum to ask code questions), it doesnât seem like I can store something like - http://dpaste.com/218RW5G (I get a 400, which I guess is the size limit, as smaller examples work - e.g. http://ws.stfx.eu/64XPQAYR2YTU Yes, that is too much, 2.4KB > 2 KB. I could update the limit a bit if you want, it just has to be small enough to protect the server. Note that ws.stfx.eu (not plain stfx.eu) also has the nice property that you either get an HTML page or the raw text. http://ws.stfx.eu/64XPQAYR2YTU http://ws.stfx.eu/64XPQAYR2YTU?format=text When the server detects a browser client, it will serve HTML, else it will server raw text. 'http://ws.stfx.eu/64XPQAYR2YTU' asUrl retrieveContents. > Tim > >> On 17 May 2019, at 11:15, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >> >> Tim, >> >>> On 17 May 2019, at 11:57, Tim Mackinnon <tim(a)testit.works> wrote: >>> >>> Thanks for chipping in Sven - Iâd asked Ben for some help as Iâd seen him on discord - that solution does indeed work. >>> >>> See: http://dpaste.com/218RW5G (which isnât bad - not sure about he red boxes around things, but the smalltalk highlighting is quite good (pygments I think), although there is another one that exercism use - whose name evades me). >>> >>> This same example doesnât work on Stfx - I get a 400 error, which I assumed was size, although 2k should give you a decent chunk of text - but I guess showing a package of code or a stack trace does blow through that. Hence my investigation of other tools like dPaste, pastebin and paste.ee. >> >> But these are different ! >> >> http://ws.stfx.eu > Getting Started Workspace >> >> http://ws.stfx.eu/1WS4U >> >> ZnClient >> new >> systemPolicy; >> beOneShot; >> url: 'http://ws.stfx.eu'; >> contents: ('''I was created \{1\} ago'' format: \{ (DateAndTime now - (DateAndTime fromString: ''{1}'')) humanReadablePrintString \}.' format: { DateAndTime >> now }); >> post. >> >> http://ws.stfx.eu/B0065H9IDJC0 >> >>> As a related question - how would I know to use #addPart: vs: #formAt: ? >> >> By knowing/understanding a bit more about HTTP ? ;-) >> >>> As our questions indicated - formAt: works for most things until you hit fields with $; in them (which I was suprised wasnât just encoded when sent in the form). >> >> How so ? Can you give me something simple that I can run that exposes that issue ? >> >>> The docs at dPaste are quite minimal - http://dpaste.com/api/v2/ which is why I didnât think of multi-part, so what would guide me down that route? >> >> That is their problem, they need to explain how their stuff works. >> >> Using verbose mode in curl usually helps a lot too. >> >> Sven >> >>> Tim >>> >>> >>>> On 17 May 2019, at 09:39, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >>>> >>>> Tim, >>>> >>>>> On 17 May 2019, at 03:04, Tim Mackinnon <tim(a)testit.works> wrote: >>>>> >>>>> I was trying to automate posting some values to a website (I would use Stfx.eu but it doesnât do syntax highlighting and only seems to work for quite small amounts). >>>> >>>> Hmm, it does highlighting (but it is far from perfect). >>>> >>>> There is indeed a limit to the upload size, 2048 bytes. >>>> >>>> I answered Ben for the same problem, I believe, the solution being >>>> >>>> http://ws.stfx.eu/QZTOS3HQAAPS >>>> >>>> Regards, >>>> >>>> Sven >>>> >>>>> Anyway the following code always seems to trim values that have a ; in them - and Iâm wondering if Iâm missing something - or if its the endpoint that has an issue (although curl seems to work fine). >>>>> >>>>> content := 'hello world; hello'. >>>>> ZnClient new >>>>> systemPolicy; >>>>> beOneShot; >>>>> url: 'http://dpaste.com/api/v2/'; >>>>> formAt: 'title' put: 'my; title'; >>>>> formAt: 'syntax' put: 'smalltalk'; >>>>> formAt: 'expiry_days' put: '5'; >>>>> formAt: 'content' put: content; >>>>> post. >>>>> >>>>> Tim >>>> >>>> >>> >> >> >

May 17, 2019

Re: [Pharo-users] Small query about ZnClient post - with "; " form values

by Tim Mackinnon

Thanks Sven - Iâll ping the guy at dpaste and ask - I was just curious if I was missing something obvious in encodingâ¦ his docs are sparse. Muy point about stfx vs dpaste is that the latter uses one of those js syntax highlighting libraries (not sure what you use) and so you get something that looks quite nice (not knocking stfx but maybe it could use one of them too) - but more critically (for me trying to help exercism users communicate on this forum to ask code questions), it doesnât seem like I can store something like - http://dpaste.com/218RW5G (I get a 400, which I guess is the size limit, as smaller examples work - e.g. http://ws.stfx.eu/64XPQAYR2YTU <http://ws.stfx.eu/64XPQAYR2YTU> Tim > On 17 May 2019, at 11:15, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > Tim, > >> On 17 May 2019, at 11:57, Tim Mackinnon <tim(a)testit.works> wrote: >> >> Thanks for chipping in Sven - Iâd asked Ben for some help as Iâd seen him on discord - that solution does indeed work. >> >> See: http://dpaste.com/218RW5G (which isnât bad - not sure about he red boxes around things, but the smalltalk highlighting is quite good (pygments I think), although there is another one that exercism use - whose name evades me). >> >> This same example doesnât work on Stfx - I get a 400 error, which I assumed was size, although 2k should give you a decent chunk of text - but I guess showing a package of code or a stack trace does blow through that. Hence my investigation of other tools like dPaste, pastebin and paste.ee. > > But these are different ! > > http://ws.stfx.eu > Getting Started Workspace > > http://ws.stfx.eu/1WS4U > > ZnClient > new > systemPolicy; > beOneShot; > url: 'http://ws.stfx.eu'; > contents: ('''I was created \{1\} ago'' format: \{ (DateAndTime now - (DateAndTime fromString: ''{1}'')) humanReadablePrintString \}.' format: { DateAndTime > now }); > post. > > http://ws.stfx.eu/B0065H9IDJC0 > >> As a related question - how would I know to use #addPart: vs: #formAt: ? > > By knowing/understanding a bit more about HTTP ? ;-) > >> As our questions indicated - formAt: works for most things until you hit fields with $; in them (which I was suprised wasnât just encoded when sent in the form). > > How so ? Can you give me something simple that I can run that exposes that issue ? > >> The docs at dPaste are quite minimal - http://dpaste.com/api/v2/ which is why I didnât think of multi-part, so what would guide me down that route? > > That is their problem, they need to explain how their stuff works. > > Using verbose mode in curl usually helps a lot too. > > Sven > >> Tim >> >> >>> On 17 May 2019, at 09:39, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >>> >>> Tim, >>> >>>> On 17 May 2019, at 03:04, Tim Mackinnon <tim(a)testit.works> wrote: >>>> >>>> I was trying to automate posting some values to a website (I would use Stfx.eu but it doesnât do syntax highlighting and only seems to work for quite small amounts). >>> >>> Hmm, it does highlighting (but it is far from perfect). >>> >>> There is indeed a limit to the upload size, 2048 bytes. >>> >>> I answered Ben for the same problem, I believe, the solution being >>> >>> http://ws.stfx.eu/QZTOS3HQAAPS >>> >>> Regards, >>> >>> Sven >>> >>>> Anyway the following code always seems to trim values that have a ; in them - and Iâm wondering if Iâm missing something - or if its the endpoint that has an issue (although curl seems to work fine). >>>> >>>> content := 'hello world; hello'. >>>> ZnClient new >>>> systemPolicy; >>>> beOneShot; >>>> url: 'http://dpaste.com/api/v2/'; >>>> formAt: 'title' put: 'my; title'; >>>> formAt: 'syntax' put: 'smalltalk'; >>>> formAt: 'expiry_days' put: '5'; >>>> formAt: 'content' put: content; >>>> post. >>>> >>>> Tim >>> >>> >> > >

May 17, 2019

Re: [Pharo-users] Small query about ZnClient post - with "; " form values

by Sven Van Caekenberghe

> On 17 May 2019, at 12:15, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > >> As a related question - how would I know to use #addPart: vs: #formAt: ? > > By knowing/understanding a bit more about HTTP ? ;-) As I wrote in my reply to Ben: Although curl is powerful, well known and well supported, I would not say it is a great standard for interface design, it is way too complex. Zn tries to approach HTTP from an object design standpoint. You pass along a ZnMultiPartFormDataEntity object that contains ZnMimeParts as entity to your POST request. HTTP transfers resources or entities between a client and a server using a limited set of verbs (ZnMessage subclasses ZnRequest and ZnResponse). Headers (ZnHeaders) contain meta data about HTTP messages. Simplified, with a GET you request a resource, with a DELETE you remove a resource, with POST you create a new resource and with PUT/PATCH you update an existing resource. Resources/entities can be anything, they are described by mime types (ZnMimeType) and identified by URLs/URIs (ZnUrl). Zn models them as subclasses of ZnEntity. The most fundamental ones are ZnStringEntity for text based data and ZnByteArrayEntity for binary data. ZnStreamEntity is a special variant that support streaming transfers. >From the world of HTML (not HTTP !), more specifically, Forms, there are 2 popular resources/entities: ZnApplicationFormUrlEncodedEntity and ZnMultiPartFormDataEntity. These have structure that is also exposed as an API - and for which there is some extra support in ZnClient. Most real REST APIs use JSON or XML for their payloads (see the #forJsonREST method for example). HTH, Sven

May 17, 2019

Re: [Pharo-users] Small query about ZnClient post - with "; " form values

by Sven Van Caekenberghe

Tim, > On 17 May 2019, at 11:57, Tim Mackinnon <tim(a)testit.works> wrote: > > Thanks for chipping in Sven - Iâd asked Ben for some help as Iâd seen him on discord - that solution does indeed work. > > See: http://dpaste.com/218RW5G (which isnât bad - not sure about he red boxes around things, but the smalltalk highlighting is quite good (pygments I think), although there is another one that exercism use - whose name evades me). > > This same example doesnât work on Stfx - I get a 400 error, which I assumed was size, although 2k should give you a decent chunk of text - but I guess showing a package of code or a stack trace does blow through that. Hence my investigation of other tools like dPaste, pastebin and paste.ee. But these are different ! http://ws.stfx.eu > Getting Started Workspace http://ws.stfx.eu/1WS4U ZnClient new systemPolicy; beOneShot; url: 'http://ws.stfx.eu'; contents: ('''I was created \{1\} ago'' format: \{ (DateAndTime now - (DateAndTime fromString: ''{1}'')) humanReadablePrintString \}.' format: { DateAndTime now }); post. http://ws.stfx.eu/B0065H9IDJC0 > As a related question - how would I know to use #addPart: vs: #formAt: ? By knowing/understanding a bit more about HTTP ? ;-) > As our questions indicated - formAt: works for most things until you hit fields with $; in them (which I was suprised wasnât just encoded when sent in the form). How so ? Can you give me something simple that I can run that exposes that issue ? > The docs at dPaste are quite minimal - http://dpaste.com/api/v2/ which is why I didnât think of multi-part, so what would guide me down that route? That is their problem, they need to explain how their stuff works. Using verbose mode in curl usually helps a lot too. Sven > Tim > > >> On 17 May 2019, at 09:39, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >> >> Tim, >> >>> On 17 May 2019, at 03:04, Tim Mackinnon <tim(a)testit.works> wrote: >>> >>> I was trying to automate posting some values to a website (I would use Stfx.eu but it doesnât do syntax highlighting and only seems to work for quite small amounts). >> >> Hmm, it does highlighting (but it is far from perfect). >> >> There is indeed a limit to the upload size, 2048 bytes. >> >> I answered Ben for the same problem, I believe, the solution being >> >> http://ws.stfx.eu/QZTOS3HQAAPS >> >> Regards, >> >> Sven >> >>> Anyway the following code always seems to trim values that have a ; in them - and Iâm wondering if Iâm missing something - or if its the endpoint that has an issue (although curl seems to work fine). >>> >>> content := 'hello world; hello'. >>> ZnClient new >>> systemPolicy; >>> beOneShot; >>> url: 'http://dpaste.com/api/v2/'; >>> formAt: 'title' put: 'my; title'; >>> formAt: 'syntax' put: 'smalltalk'; >>> formAt: 'expiry_days' put: '5'; >>> formAt: 'content' put: content; >>> post. >>> >>> Tim >> >> >

May 17, 2019

Re: [Pharo-users] Small query about ZnClient post - with "; " form values

by Tim Mackinnon

Thanks for chipping in Sven - Iâd asked Ben for some help as Iâd seen him on discord - that solution does indeed work. See: http://dpaste.com/218RW5G <http://dpaste.com/218RW5G> (which isnât bad - not sure about he red boxes around things, but the smalltalk highlighting is quite good (pygments I think), although there is another one that exercism use - whose name evades me). This same example doesnât work on Stfx - I get a 400 error, which I assumed was size, although 2k should give you a decent chunk of text - but I guess showing a package of code or a stack trace does blow through that. Hence my investigation of other tools like dPaste, pastebin and paste.ee. As a related question - how would I know to use #addPart: vs: #formAt: ? As our questions indicated - formAt: works for most things until you hit fields with $; in them (which I was suprised wasnât just encoded when sent in the form). The docs at dPaste are quite minimal - http://dpaste.com/api/v2/ <http://dpaste.com/api/v2/> which is why I didnât think of multi-part, so what would guide me down that route? Tim > On 17 May 2019, at 09:39, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > Tim, > >> On 17 May 2019, at 03:04, Tim Mackinnon <tim(a)testit.works> wrote: >> >> I was trying to automate posting some values to a website (I would use Stfx.eu but it doesnât do syntax highlighting and only seems to work for quite small amounts). > > Hmm, it does highlighting (but it is far from perfect). > > There is indeed a limit to the upload size, 2048 bytes. > > I answered Ben for the same problem, I believe, the solution being > > http://ws.stfx.eu/QZTOS3HQAAPS > > Regards, > > Sven > >> Anyway the following code always seems to trim values that have a ; in them - and Iâm wondering if Iâm missing something - or if its the endpoint that has an issue (although curl seems to work fine). >> >> content := 'hello world; hello'. >> ZnClient new >> systemPolicy; >> beOneShot; >> url: 'http://dpaste.com/api/v2/'; >> formAt: 'title' put: 'my; title'; >> formAt: 'syntax' put: 'smalltalk'; >> formAt: 'expiry_days' put: '5'; >> formAt: 'content' put: content; >> post. >> >> Tim > >

May 17, 2019

Re: [Pharo-users] can I do this with a stream or a format

by Sven Van Caekenberghe

I would make that ^ String new: gifts size * 10 streamContents: [ :stream | gifts allButLastDo: [:each | stream nextPutAll: each; nextPutAll: ', ']. stream nextPutAll: 'and '; nextPutAll: gifts last ] Your iteration is well done, clear and to the point. > On 17 May 2019, at 02:44, Richard O'Keefe <raoknz(a)gmail.com> wrote: > > stream := WriteStream on: (String new: gifts size * "estimated size per gift" 10). > "The number after #new: is the *initial* allocation; the stream will reallocate it > as needed." > gifts allButLastDo: [:each | > stream nextPutAll: each; nextPutAll: ', ']. > stream nextPutAll: 'and '; nextPutAll: gifts last. > ^stream contents > Using #allButLastDo: saves making a copy of (most of) gifts. > How could you find out about these things? > > You want to join some strings, so you look for a "join" method in String and you > will find > > join: aCollection > ^ self class new: (aCollection size * self size) streamContents: [:stream | > aCollection > do: [:each | stream nextPutAll: each asString] > separatedBy: [stream nextPutAll: self]] > > > You might wonder if there is already something close to what you want, so you > might enter "commas" into Spotter. If you did that, you would find > Collection>>asCommaStringAnd so that the whole thing is very nearly > gifts asCommaStringAnd > > Just as the concatenation selector #, works with most kinds of sequences, > so building sequences up using a WriteStream works with most kinds of sequences. > > Let's work through a little example. We are just going to build up the string > 'Quick' one character at a time. > s := ''. > s := s , 'Q'. "creates a new string holding 'Q'" > s := s , 'u'. "creates a new string holding 'Qu'" > s := s , 'i'. "creates a new string holding 'Qui'" > s := s , 'c'. "creates a new string holding 'Quic'" > s := s , 'k'. "creates a new string holding 'Quick'" > > You see that building a string of n characters will actually create n new strings, > all but the last of which will be thrown away, taking O(n**2) time. > > Now let's use a stream. > w := WriteStream on: (String new: 4). "Yes, I know that's too small." > w nextPutAll: 'Q'. "The stream now holds 'Q...' in its buffer." > w nextPutAll: 'u'. "The stream now holds 'Qu..' in its buffer." > w nextPutAll: 'i'. "The stream now holds 'Qui.' in its buffer." > w nextPutAll: 'c'. "The stream now holds 'Quic' in its buffer." > s nextPutAll: 'k'. "There is no room left in the buffer, so the stream allocates > a new buffer twice the size and copies the old one into it. > Now it has 'Quic....' and it has room. > The stream now holds 'Quick...' in its buffer." > s := w contents. "We are asking for the defined elements of the buffer. > This means s := buffer copyFrom: 1 to: w position." > > You see that building a string of n characters this way requires a minimum of > two strings, the buffer and the final result. The buffer may be periodically > resized, but growing by doubling means the average cost is still O(n). > > Let's time these to get an idea. > Time millisecondsToRun: [ > |s| > s := ''. > 1 to: 10000 do: [:i | > s := s , i printString]. > s size] > => 124 > Time millisecondsToRun: [ > |w| > w := WriteStream on: (String new: 10000). > 1 to: 10000 do: [:i | > w nextPutAll: i printString]. > w contents size] > => 7 > > This is exactly the reason that Java has both String and StringBuilder. > The tragedy of Java (well, not the only one) is that they had the example > of Smalltalk before them, showing very very clearly that the best way to > handle object to text conversion is to use #printOn: as the primitive, > not #printString, and they *still* went ahead and did the worse thing. > (Ruby has even less excuse for privileging to_s.) > > There are quite a few books about Smalltalk available as free PDFs from > the Pharo web site, a wonderful resource. The Blue Book (Smalltalk-80 > The Language and its Implementation) describes streams in Chapter 12. > > > On Fri, 17 May 2019 at 07:21, Roelof Wobben <r.wobben(a)home.nl> wrote: > Hello, > > Im testing all my solutions with critiz and can solve almost all problems, > > Only this one I cannot figure out. > > I have this code > (gifts allButLast > inject: '' > into: [ :str :each | str , each , ', ' ]) , 'and ' , gifts last ] > > and critiz says I should use a stream . > > How can I make this work ? > > Roelof > >

May 17, 2019

Re: [Pharo-users] Small query about ZnClient post - with "; " form values

by Sven Van Caekenberghe

Tim, > On 17 May 2019, at 03:04, Tim Mackinnon <tim(a)testit.works> wrote: > > I was trying to automate posting some values to a website (I would use Stfx.eu but it doesnât do syntax highlighting and only seems to work for quite small amounts). Hmm, it does highlighting (but it is far from perfect). There is indeed a limit to the upload size, 2048 bytes. I answered Ben for the same problem, I believe, the solution being http://ws.stfx.eu/QZTOS3HQAAPS Regards, Sven > Anyway the following code always seems to trim values that have a ; in them - and Iâm wondering if Iâm missing something - or if its the endpoint that has an issue (although curl seems to work fine). > > content := 'hello world; hello'. > ZnClient new > systemPolicy; > beOneShot; > url: 'http://dpaste.com/api/v2/'; > formAt: 'title' put: 'my; title'; > formAt: 'syntax' put: 'smalltalk'; > formAt: 'expiry_days' put: '5'; > formAt: 'content' put: content; > post. > > Tim

May 17, 2019