gmane.comp.lang.factor.general

Naming convention for destructive operations

Slava Pestov — 2008-07-25T07:30:34

So Ed, I don't like the ! suffix because it overlaps with comments. What about past tense to denote mutation? suffix suffixed append appended reverse reversed remove removed (or pluck, plucked)? remove-nth removed-nth (or snip, snipped)? Slava ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: Fry is a lubricant

David Petersheim — 2008-07-25T06:20:06

got it. thanks. On Fri, Jul 25, 2008 at 1:28 AM, Slava Pestov public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: Low-impact language change: reverse!

Slava Pestov — 2008-07-25T05:43:57

Ed, I like the '-here' suffix more than !. It would be nice if it was used more consistently. I want to avoid any language changes until the compiler is done. Slava On Fri, Jul 25, 2008 at 12:36 AM, Eduardo Cavazos public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Low-impact language change: reverse!

Eduardo Cavazos — 2008-07-25T05:36:51

Slava, We currently have: reverse ( seq -- seq ) reverse-here ( seq -- ) I'd like to add: reverse! ( seq -- seq ) and deprecate 'reverse-here'. By the way, there are 4 usages of 'reverse-here' and they are all: dup reverse-here I say "low-impact" because this is an addition; adding 'reverse!' won't break anything and will make the library more consistent. Ed ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: Fry is a lubricant

Slava Pestov — 2008-07-25T05:28:47

On Thu, Jul 24, 2008 at 11:30 PM, David Petersheim public.gmane.org> wrote: Fire up Factor, and run "fry" about Slava ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: Fry is a lubricant

David Petersheim — 2008-07-25T04:30:34

If it's not too much trouble, could someone tell me what fry is? On Thu, Jul 24, 2008 at 11:58 PM, Slava Pestov public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Fry is a lubricant

Slava Pestov — 2008-07-25T03:58:00

Hi all, I like fry very much, but I've noticed that most of my usages of 'fry' are pretty trivial, stuff like '[ , foo ] '[ , , foo ] Or sometimes the slightly more elaborate '[ swap , foo ] '[ drop , foo ] I've been trying to reconcile these two facts, and I think I've figured it out. In theory, fry is sort of redundant, because most usages do not really take advantage of its full power. However, often when I'm writing some code, the first iteration is more complex than it needs to be, and in these cases, I will end up with more complex fry forms, stuff like '[ [ , blah ] bi< at > ] 2each It seems that a lot of the time, the natural progression of the code simplifies it down to something with a trivial use of fry; I'll change a stack effect here, tweak a tuple there, and suddenly my complex logic evaporates and the complex fry usage along with it. But having fry there makes it easy to get the first iteration going, and to gradually refactor it later, rather than spending time up-front writing complex s

Re: question

Slava Pestov — 2008-07-25T02:49:41

Hi Graham, Your intuition about closing the input side before reading output is correct, and the following program should, in theory, work: USING: namespaces destructors io io.encodings.ascii io.streams.duplex io.launcher ; "sort" ascii [ "a\nc\nb\n" write output-stream get dispose input-stream get contents ] with-stream However, after testing it I discovered that is in fact broken, along with ! Oops... Seems that is the only one that worked, because its the only one that any of our 'real' code actually uses. I added some tests for and fixed the problems; the latest git should work properly with the above snippet now. Thanks for raising this issue, Slava On Thu, Jul 24, 2008 at 9:01 PM, Graham Fawcett public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challe

question

Graham Fawcett — 2008-07-25T02:01:01

Hi folks, I would like to use an external program to process some text, and the word seems to be the right choice, but I can't get it working. I wrote this, for example: "sort" ascii [ "a\nc\nb\n" write flush 1000 read ] with-stream ...hoping that it would leave a string of sorted lines on the top of the stack. But it fails with a broken-pipe error. In other languages, I'd flush and close the input descriptor before trying to read from the output descriptor, and I suspect that's what's wrong here, but don't know how to do that on a duplex stream. Any suggestions? Thanks, Graham ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Equality on numbers

Slava Pestov — 2008-07-24T21:00:18

Hi all, I plan on changing = so that a rational and a float with the same numeric value are not considered equal. Eg, 10 10 = . => t 10 10.0 = . => f 1/2 0.5 = . => f You will still be able to coerce the rational to a float and then compare, or to use a word such as ~ for approximate equality. Are there any objections? Slava ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: indexes

Chris Double — 2008-07-24T09:35:54

I use the following words occasionally for searching for existing words: http://paste.factorcode.org/responder/pastebin/show-paste?n=70 : help-text ( word -- seq ) word-help flatten [ string? ] filter concat " " split ; : help-search ( tags -- seq ) all-words [ help-text subset? ] with filter ; { "sequence" "random" } help-search => { produce random-bytes* random } Chris

Re: indexes

Phil Dawes — 2008-07-24T09:18:17

Gah! I need an apropos that corrects my spelling! Thanks, Phil Eduardo Cavazos wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: indexes

Eduardo Cavazos — 2008-07-23T20:17:41

Hi Phil, There's an 'indices' in 'sequences.lib': : indices ( seq obj -- seq ) >r dup length swap r> [ = [ ] [ drop f ] if ] curry 2map sift ; Ed ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

indexes

Phil Dawes — 2008-07-23T19:39:24

Hi Factor list, I wrote this today after being surprised that it wasn't in the sequences vocab: : (indexes) ( obj seq n -- ) [ 2dup ] dip swap index-from [ dup , 1+ (indexes) ] [ 2drop ] if* ; : indexes ( obj seq -- idxseq ) [ 0 (indexes) ] { } make ; It returns indexes to all occurrences of obj in seq. Have I missed this implemented somewhere else, or shall I add it to sequences? Thanks, Phil ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: word changes

Slava Pestov — 2008-07-21T21:30:04

Hi, Factor is still under heavy development -- we haven't even released 1.0 yet -- so having to occasionally update code for language changes is just a fact of life. However, things are slowly stabilizing, and we haven't had any major incompatible language changes for a little while now. The old delegation feature is up for removal soon, and the removal of old-style slot accessors is also on the horizon, but other than those two you don't have to worry about language changes for a while yet. Slava On Mon, Jul 21, 2008 at 6:43 AM, Hegedűs Gál public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: 'Literal value expected' warnings

Phil Dawes — 2008-07-21T20:29:50

Ah ok, so the compiler is warning that it can't compile the inline word (because ultimately it can't infer the stack effect of the seq of quotes passed in). Would it be possible to suppress the warning of compile failures on inline words? I've found myself ignoring warnings when I write vocabs because there are so many - if I could reduce them to things I should do something about I'd be more likely to take notice. Cheers, Phil ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: 'Literal value expected' warnings

Slava Pestov — 2008-07-21T16:56:17

Hi, In this case you did the right thing by declaring elts-match? inline. It won't compile but the rest of the words will. "inference" about has details. Slava On Mon, Jul 21, 2008 at 4:28 AM, Phil Dawes public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/

Re: word changes

Phil Dawes — 2008-07-21T13:08:48

> It would be pretty helpful if ther’d be a changelog of some kind. > > Or if it’s already out there where can i find it? I usually checkout the source via git, then do gitk /path/to/vocab to see the localised change history to that vocab. The commit messages usually hint at what's going on. Hope that helps, Phil ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Factor-talk mailing list Factor-talk< at >lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk

word changes

Hegedűs Gál — 2008-07-21T11:43:39

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'Literal value expected' warnings

Phil Dawes — 2008-07-21T09:28:50

Hi Slava, What does the warning 'Literal value expected' signify? I get a bunch of these warnings in my code and I'm not sure how to remove them. e.g. ( scratchpad ) USE: bstore.query.clauses Loading P" bstore/query/clauses/clauses.factor" :warnings - print 1 semantic warnings. ( scratchpad ) :warnings While compiling elts-match?: Word: elts-match? Literal value expected "delegate" f Nesting: { elts-match? } I've pasted the vocab causing this below for reference; all the words and predicates infer ok. Is the warning because of macros or inlines that I'm importing or is there something I should be doing differently? Many thanks, Phil IN: bstore.query.clauses USING: arrays kernel sequences strings math combinators.lib combinators.short-circuit ; : variable? ( str -- ? ) [ string? ] [ first CHAR: ? = ] bi and ; : literalstr? ( str -- ? ) { [ "_" = not ] [ "substr" = not ] [ string? ] [ variable? not ] } 1&& ; : literal? ( str -- ? ) { [ integer? ] [ literalstr? ] } 1|| ; : elts-match? (

Re: Speeding up loads?

Daniel Ehrenberg — 2008-07-21T02:58:23

If you don't want this to take a long time when starting Factor up, you can also save your image once you've loaded the libraries you want. You can do this with the "save" word. Dan On Sun, Jul 20, 2008 at 3:55 PM, Eduardo Cavazos public.gmane.org> wrote: ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/