forth page
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# forth
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stack-based and lightweight programming language.
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it uses the {postfix} notation.
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# reading
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this book has a great pace and nice illustrations
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=> https://www.forth.com/starting-forth starting forth book
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# some words
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## running words
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these are some words for doing arithmetic with paces (min/km) and velocities (km/hr)
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``` forth words
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: ms>s swap 60 * + ; ( min segs -- segs )
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: hms>s ms>s swap 3600 * + ; ( hr min segs -- segs )
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: msd>s1k >r ms>s 1000 swap r> */ ; ( min segs metros -- segs1km )
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: paso>vel ms>s s1k>vel ; ( min segs -- vel )
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: s1k>vel 3600 swap / ; ( segs1km -- vel )
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: vel>s1k 3600 swap / ; ( vel -- segs1km )
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: .min 0 <# [CHAR] ' HOLD #S #> TYPE ; ( min -- )
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: .seg 0 <# [CHAR] " HOLD # # #> TYPE ; ( segs -- )
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: .ms 60 /mod .min .seg ; ( segs -- )
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: .vel . ." km/hr " ;
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: lista-velocidades cr 21 10 do i dup . vel>s1k .ms cr loop ;
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```
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for example, to convert a velocity to a pace, and print it:
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``` input: 18, output: 3'20"
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18 vel>s1k .ms
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3'20" ok
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```
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to do the opposite operation:
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``` input: 3 20, output: 18 km/hr
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3 20 ms>s s1k>vel .vel
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18 km/hr ok
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```
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to get the pace of a given segment, using minutes, seconds and distance in meters:
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``` input: 1 03 300, output: 3'30"
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1 03 300 msd>s1k .ms
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3'30" ok
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```
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@ -8,6 +8,7 @@ writing code closer to the machine(s)
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# software
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=> ./forth.gmi {forth}
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=> ./uxnería.gmi {uxnería}
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=> ./nibble_dice_tracker.gmi {nibble dice tracker}
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=> ./darena.gmi {darena}
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@ -2,6 +2,7 @@
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# url = https://compudanzas.net/tw.txt
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# url = gemini://compudanzas.net/tw.txt
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#
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2021-07-15T12:00:00-05:00 reading starting {forth}. possible practice, puzle, game, eventually dance?
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2021-07-12T12:00:00-05:00 published the {uxnería} repo for {uxn} projects and sketches. excited about the {nibble dice tracker}!
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2021-07-05T21:00:00-05:00 for the fourth session of the workshop we shared our máquina universal bailable {mub} - it was great to revisit it!
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2021-06-30T21:00:00-05:00 in the third session of the workshop we learned and performed the {danzasistemas-tag} (first time ever!) and a turing machine in {d-turing} mode
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@ -1,6 +1,6 @@
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# uxn
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uxn is a little forth machine with 32 instructions.
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uxn is a little {forth} machine with 32 instructions.
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=> https://wiki.xxiivv.com/site/uxn.html uxn
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@ -8,11 +8,10 @@ it uses the {postfix} notation.
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our projects and sketches are hosted in the {uxnería}
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# notes
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## common code structures
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# common code structures
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### loop with a counter
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## loop with a counter
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loop with a structure that allows you to easily use the iteration counter:
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