[Factor-talk] Finding words with given stack effect
Does Factor have a word for searching words given a stack-effect? Something like: (( x p q -- )) words-with-stack-effect will list out 'bi' and other words with that effect. -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. When you stand for what you believe in, you can change the world. -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] Writing a zip-with function
( scratchpad ) { { 1 2 } { 3 4 } { 8 9 } }
{ { 8 9 } { 0 2 } { 1 5 } }
--- Data stack:
{ ~array~ ~array~ ~array~ }
{ ~array~ ~array~ ~array~ }
( scratchpad ) zip [ [ first ] [ second ] bi append ] map
--- Data stack:
{ ~array~ ~array~ ~array~ }
( scratchpad ) [ . ] each
{ 1 2 8 9 }
{ 3 4 0 2 }
{ 8 9 1 5 }
The above code zips the two lists and then maps each pair to an element
using some function. This pattern occurs very often while coding, and I'd
like to abstract it out in as a separate word.
I tried writing it this way, but the code fails to compile:
:: zip-with ( xs ys quot -- zs )
xs ys zip [ [ first ] [ second ] bi quot ] map ;
Q1. How do I make it work?
Q2. How to write this without locals?
--
Cheers,
missingfaktor <http://twitter.com/#!/missingfaktor>.
When you stand for what you believe in, you can change the world.
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[Factor-talk] Abstraction like Clojure's protocols?
Factor's generic words are similar to Clojure's multimethods. However there are times when protocols (in Clojure speak) are more appropriate abstraction. Does Factor support a construct similar to protocols? -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. When you stand for what you believe in, you can change the world. -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] Where can I get this Factor Listener?
Where can I get the Factor Listener used in this video: http://www.youtube.com/watch?v=f_0QlhYlS8g? The one I downloaded from the project site is different and less convenient to use. -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. When you stand for what you believe in, you can change the world. -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] "group-by" word
I want to write a word "group-by" that has following stack effect and
behavior:
Signature:
: group-by ( seq quot -- alist ) (group-by-impl) ;
Input:
{ "hello" "hola" "ball" "scala" "java" "factor" "python" } [ length ]
group-by
Output:
H{
{ 5 { "hello" "scala" } }
{ 4 { "hola" "ball" "java" } }
{ 6 { "factor" "python" } }
}
I tried this many times, but failed. Can someone please provide me an
implementation for this, preferably with an explanation?
--
Cheers,
missingfaktor <http://twitter.com/#!/missingfaktor>.
When you stand for what you believe in, you can change the world.
--
All the data continuously generated in your IT infrastructure
contains a definitive record of customers, application performance,
security threats, fraudulent activity, and more. Splunk takes this
data and makes sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-novd2d___
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[Factor-talk] A word similar to Haskell's 'iterate'
Does Factor have a word similar to Haskell's 'iterate' function? -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. When you stand for what you believe in, you can change the world. -- Cloud Services Checklist: Pricing and Packaging Optimization This white paper is intended to serve as a reference, checklist and point of discussion for anyone considering optimizing the pricing and packaging model of a cloud services business. Read Now! http://www.accelacomm.com/jaw/sfnl/114/51491232/___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] A word that lets me ommit stack comments
Is there a parsing word that lets you define words without a stack effect declaration? -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] Attempting to solve Project Euler problem 2
Text of the problem: Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... . By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms. My solution: : million ( n -- n' ) 100 * ; : fibonacci ( n -- seq ) 0 1 rot '[ dup _ < ] [ swap over + dup ] produce 2nip ; ! Where has "tuck" gone?! 4 million fibonacci [ even? ] filter sum Any comments on how it can be simplified or made more idiomatic? -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] What does "fried" in "fried quotations" mean?
Or, why are fried quotations called what they are called? -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
[Factor-talk] Short-circuiting boolean operators?
I was unable to find short-circuiting boolean operators in Factor's standard vocabs. Does it not have them? If not, why not? If yes, where are they? -- Cheers, missingfaktor <http://twitter.com/#!/missingfaktor>. -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
