http://www.calormen.com/Logo/ 2011-12-30T07:25:55.648Z Joshua Bell inexorabletash@gmail.com http://www.calormen.com/ http://www.calormen.com/Logo/34 2011-12-30T07:25:55.648Z <p> Added support for IE8 via <a href="http://flashcanvas.net">FlashCanvas</a> </p> <p> Migrated <a href="tests.htm">unit tests</a> over to use <a href="http://docs.jquery.com/QUnit">QUnit</a>. </p> http://www.calormen.com/Logo/34 2011-10-22T20:46:36.000Z <p> Added another feature from Ofer Wald: <code>ARC <var>angle</var> <var>radius</var></code> (<a href="http://calormen.com/logo/?cs%20repeat%2018%20[%20arc%20repcount%20*%2020%20repcount%20*%205%20]">example</a>) </p> http://www.calormen.com/Logo/33 2011-10-14T23:00:00-08:00 <p> Added <code>COPYDEF</code> and made it and <code>ERASE</code> respect <code>REDEFP</code> when it comes to primitives (built-in procedures). </p> <p> Applied two patches from Ofer Wald: make text drawn with <code>LABEL</code> (<a href="http://calormen.com/logo/?window%20pu%20repeat%2072%20[%20setlabelheight%20repcount%20fd%20repcount%20*%202.5%20label%20%22Logo%20bk%20repcount%20*%202.5%20rt%2010%20]">example</a>) rotate with the mouse, and prevent primitives from being overridden with <code>TO</code> </p> <p> You can now put short programs in the URL hash (#blah) as well as the query string (?blah). </p> http://www.calormen.com/Logo/32 2010-08-07T18:01:00-08:00 <p> Modified the way the turtle is drawn - it now uses an overlay canvas instead of drawing to a backbuffer. This simplifies the code. (I didn't realize HTML5 canvases were transparent when I first implemented this!) </p> <p> Removed fallback canvas text API support, so <code>LABEL</code> will not work on iOS 3 and earlier or Firefox 3.0. </p> http://www.calormen.com/Logo/31 2010-03-27T14:57:00-08:00 <p> Added: <code>WINDOW</code>, <code>WRAP</code>, <code>FENCE</code> and <code>TURTLEMODE</code> </p> http://www.calormen.com/Logo/30 2009-11-26T18:07:00-08:00 <p> Infix arithmetic and order-comparison operators now force arguments to be numbers. </p> <p> Fractional decimals with no leading zero (e.g. .1) now parse correctly again. </p> <p> Added: <code>PENPAINT</code>, <code>PENERASE</code>, <code>PENREVERSE</code> </p> <p> <code>READWORD</code> can take an optional prompt string input. e.g. <code>(READWORD "width:)</code> </p> http://www.calormen.com/Logo/29 2009-11-24T21:02:00-08:00 <p> Expression evaluation separated from parsing. <code>AND</code> and <code>OR</code> now short-circuit evaluation. </p> <p> Slight tweaks to <code>TYPE</code> output. </p> <p> Added aliases: <code>BF</code>, <code>BFS</code>, <code>BL</code>, <code>IFT</code>, <code>IFF</code>, <code>OP</code> </p> <p> Added: <code>READWORD</code>, <code>ABS</code> </p> http://www.calormen.com/Logo/28 2009-11-19T21:17:00-08:00 <p> You can now specify a program to run in the URL hash or query string. You can %-encode characters or, as a shortcut, use _ instead of space, e.g. <a href="http://www.calormen.com/Logo/?repeat_4_[fd_100_rt_90]">http://www.calormen.com/Logo/?repeat_4_[fd_100_rt_90]</a> </p> <p> Thanks to discussion on <a href="http://groups.yahoo.com/group/LogoForum/">LogoForum</a> has shown me the error of my ways regarding lists. The contents of list literals is no longer evaluated. </p> http://www.calormen.com/Logo/27 2009-11-11T21:30:00-08:00 <p> UCBLogo alignment - almost done! </p> <p> Added: <code>run</code>, <code>runresult</code>, <code>test</code>, <code>iftrue</code>, <code>iffalse</code>, <code>.maybeoutput</code>, <code>ignore</code>, <code>for</code>, <code>do.while</code>, <code>while</code>, <code>do.until</code>, <code>until</code> </p> http://www.calormen.com/Logo/26 2009-11-10T20:37:00-08:00 <p> UCBLogo alignment continues.... </p> <p> Added: <code>contents</code>, <code>procedures</code>, <code>primitives</code>, <code>globals</code>, <code>names</code>, <code>erase</code>, <code>erall</code>, <code>apply</code>, <code>invoke</code>, <code>foreach</code>, <code>find</code> </p> <p> Also, fixed a bug with <code>word</code> on WebKit, and ensured that long text output wraps. </p> http://www.calormen.com/Logo/25 2009-11-09T22:16:00-08:00 <p> UCBLogo alignment continies.... </p> <p> Added: <code>name</code>, <code>local</code>, <code>localmake</code>, <code>thing</code>, <code>global</code>, <code>procedurep</code>, <code>primitivep</code>, <code>definedp</code>, <code>namep</code>, <code>forever</code>, <code>bye</code> </p> <p> Corrected <code>stop</code> - was like <code>bye</code>, now like an empty <code>output</code> </p> http://www.calormen.com/Logo/24 2009-11-08T21:06:00-08:00 <p> UCBLogo alignment continies.... </p> <p> Added: <code>remainder</code>, <code>modulo</code>, <code>exp</code>, <code>log10</code>, <code>ln</code>, <code>radarctan</code>, <code>radsin</code>, <code>radcos</code>, <code>radtan</code>, <code>rseq</code>, <code>bitand</code>, <code>bitor</code>, <code>bitxor</code>, <code>bitnot</code>, <code>ashift</code>, <code>lshift</code>, <code>label</code>, <code>setlabelheight</code>, <code>shownp</code>, <code>labelsize</code>, <code>pendownp</code>, <code>pencolor</code>, <code>pensize</code> </p> <p> Removed: <code>modulus</code> (use <code>remainder</code> or <code>modulo</code>), <code>write</code> (use <code>label</code>), <code>setfont</code> (use <code>setlabelheight</code>) </p> <p> Corrected argument order for <code>(arctan x y)</code> </p> <p> In <code>(setpencolor r g b)</code>, r/g/b must be in 0..99; Logo colors 0...15 are supported. </p> http://www.calormen.com/Logo/23 2009-11-07T21:41:00-08:00 <p> I've started to work on aligning the syntax with UCB Logo. Language reference now follows UCB Logo documentation structure for ease of comparison. Code and unit tests similarly reorganized. </p> <p> Added: <code>sentence</code>, <code>combine</code>, <code>gensym</code>, <code>firsts</code>, <code>butfirsts</code>, <code>item</code>, <code>remove</code>, <code>remdup</code>, <code>wordp</code>, <code>listp</code>, <code>numberp</code>, <code>count</code>, <code>ascii</code>, <code>char</code>, <code>lowercase</code>, <code>uppercase</code> </p> <p> Added aliases <code>setpensize</code>, <code>setpencolor</code> </p> <p> Fixed equality comparisons </p> <p> Added: <code>push</code>, <code>pop</code>, <code>queue</code>, <code>dequeue</code>, <code>emptyp</code>, <code>beforep</code>, <code>memberp</code>, <code>substringp</code> </p> <p> Rigged up a text screen overlay. </p> <p> Added: <code>print</code>, <code>type</code>, <code>show</code>, <code>cleartext</code>, <code>emptyp</code>, <code>beforep</code>, <code>memberp</code>, <code>substringp</code> </p> <p> Use <code>write</code> for turtle graphics text now </p> http://www.calormen.com/Logo/22 2009-10-31T12:00:00-08:00 <p>A series of appropriately spooky changes - they're there, but you can't see them!</p> <ul> <li>Change log is now accessible as an <a href="feed.xml">Atom feed</a></li> <li>Switch to native Javascript types for primitive types (number, string, list)</li> <li>Cleaned up use of 'undefined', stopping</li> <li>Turtle graphics puled into own script module</li> <li>Pulled alerting on error out of interpreter</li> <li>Unit tests for unary minus, true, false</li> <li>Unary minus handling revamped - now confined to parser/serializer</li> </ul> http://www.calormen.com/Logo/21 2009-10-28T12:00:00-08:00 <p> <code>def</code> now takes a string argument for procname </p> <p> <code>def</code> now serializes operators correctly </p> <p> Fixed <code>clean</code> (was alerting) </p> <p> Fixed <code>heading</code> (was returning incorrect values) </p> <p>More unit tests</p> http://www.calormen.com/Logo/20 2009-10-27T12:00:00-08:00 <p>Found and fixed a handful of bugs while implementing unit tests:</p> <ul> <li> Operators <code>&lt;=</code>, <code>&gt;=</code>, <code>&lt;&gt;</code> were incorrectly parsed </li> <li> <code>if</code>, <code>ifelse</code> and <code>repeat</code> return now result of last evaluation (language extension?) </li> <li> <code>and</code>, <code>or</code>, <code>xor</code> now return 0 or 1 </li> <li> <code>lessequalp</code> and <code>lessequal?</code> corrected </li> </ul> http://www.calormen.com/Logo/19 2009-10-26T12:00:00-08:00 <p>Fixed hiding of the language reference pane</p> <p> Corrected documentation - it's <code>setfont</code> not <code>font</code> </p> <p> Added text rendering for non-Mozilla browsers c/o <a href="http://jim.studt.net/canvastext/">Jim Studt's Hershey Font implementation for HTML5 canvas</a> </p> http://www.calormen.com/Logo/18 2009-10-24T12:00:00-08:00 <p> Now licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 license</a> </p> http://www.calormen.com/Logo/17 2009-04-13T12:00:00-08:00 <p> Fixed <code>towards</code> and <code>setpos</code>, which have been broken since the 2008-08-30 update (<em>Sigh</em> - I really need to implement unit tests.) </p> http://www.calormen.com/Logo/16 2009-03-21T12:00:00-08:00 <p> Unary minus disambiguation (similar to UCBLogo): <ul> <li> Minus sign is parsed as unary minus if it begins a top-level expression, or if it follows an infix operator, or it has a leading space and has no trailing space. </li> <li> Otherwise, minus sign is parsed as an infix difference operator. </li> </ul> Compare: <ul> <li> <code>cs ht print -5</code> (unary; will print <samp>-5</samp>) </li> <li> <code>cs ht print - 5 + 10</code> (unary; will print <samp>5</samp>) </li> <li> <code>cs ht print 10 + - 5</code> (unary; will print <samp>5</samp>) </li> <li> <code>cs ht print 10 -5</code> (unary; will print <samp>10</samp>) </li> <li> <code>cs ht print 10 - 5</code> (infix; will print <samp>5</samp>) </li> <li> <code>cs ht print 10-5</code> (infix; will print <samp>10</samp>) </li> <li> <code>cs ht print 10- 5</code> (infix; will print <samp>5</samp>) </li> <li> <code>cs ht print sum 10 -5</code> (unary; will print <samp>5</samp>) </li> <li> <code>cs ht print sum 10 - 5</code> (infix; will produce error!) </li> </ul> </p> http://www.calormen.com/Logo/15 2009-01-20T12:00:00-08:00 <p> Added <code>list</code>, <code>fput</code>, <code>lput</code> </p> <p> Added <code>show</code> (temporary) which returns a string representation of its argument </p> http://www.calormen.com/Logo/14 2008-09-28T12:00:00-08:00 <p>Added (temporary) display of command history, at the bottom of the window</p> <p> Added <code>def</code> (hacky implementation) that shows the definition of a function </p> http://www.calormen.com/Logo/13 2008-09-02T12:00:00-08:00 <p> Added <code>reverse</code>, <code>iseq</code> </p> <p> <code>print</code> can now print lists </p> <p> Fixed evaluation of lists (e.g. <code>map "square [ 50 + 50 ]</code> now works) [UPDATE 2009-11-19: This is no longer the case] </p> http://www.calormen.com/Logo/12 2008-09-01T12:00:00-08:00 <p>Rearranged page to maximize display area</p> http://www.calormen.com/Logo/11 2008-08-31T12:00:00-08:00 <p> Added <code>map</code>, <code>filter</code>, <code>reduce</code> </p> <p> Added <code>pencolor</code> as alias for <code>setcolor</code>, can take r, g, b as arguments </p> <p> Blocks in <code>repeat</code>, <code>if</code>, etc. no longer introduce a scope </p> <p>Comments (anything after ; on a line) are ignored)</p> <p> Renamed predicates to <code>equal?</code>, <code>notequal?</code>, <code>less?</code>, <code>lessequal?</code>, <code>greater?</code>, <code>greaterequal?</code> </p> <p> Changed the "draw text" procedure to <code>print</code> </p> <p> Added <code>output</code> which returns a value from a procedure </p> http://www.calormen.com/Logo/10 2008-08-30T12:00:00-08:00 <p> Lisp-style calling syntax <code>( procedure input ... )</code> now operates per standard Logo, rather than as an implicit reduction. </p> <p>Make use of JavaScript 1.6 and 1.8 functions internally, via compatibility shims</p> http://www.calormen.com/Logo/9 2008-08-26T12:00:00-08:00 <p> Fixed <code>tan</code> </p> <p>Trig functions now take/return degrees</p> <p> KNOWN ISSUE: <code>setxy -100 -100</code> parses as <code>setxy (-100 -100)</code> and so fails with too few arguments. </p> <p> <code>make :var</code> and <code>make var</code> are now synonyms for <code>make "var</code> </p> <p> Added <code>true</code> and <code>false</code> </p> http://www.calormen.com/Logo/8 2008-08-25T12:00:00-08:00 <p>Fixed procedures that return values</p> <p>Made setpos and friends leave a trail if the pen is down</p> <p> <a href="http://www.jslint.com">jslint</a> cleanup </p> <p> Support <code>( proc input ... )</code> format </p> <p> Fixed <code>and</code> and <code>or</code> to not lazily-evaluate arguments - <code>and 0 1</code> would not consume the 1 </p> <p> Added support for <code>( procedure input ... )</code> expressions. Acts as <code>reduce</code>, so <code>( sum 1 2 3 4 )</code> calls <code>sum 1 2</code> then <code>sum 3 3</code> then <code>sum 6 4</code>, finally returning 10. </p> http://www.calormen.com/Logo/7 2008-08-24T12:00:00-08:00 <p>Added string/number coercion</p> <p> Added <code>word</code> and <code>output</code> </p> <p> Allow unquoted variable names in <code>make</code> </p> <p> Added <code>and</code>, <code>or</code>, <code>xor</code> and <code>setfont</code> </p> <p> Changed <code>towards</code> to return a heading, rather than set a heading </p> <p>Added infix expressions</p> <p> Added <code>first</code>, <code>last</code>, <code>butfirst</code>, <code>butlast</code> </p> <p> Added <code>power</code>, <code>sqrt</code>, <code>arctan</code>, <code>sin</code>, <code>cos</code>, <code>tan</code>, <code>int</code>, <code>round</code> </p> <p> Renamed <code>add</code> to <code>sum</code>, <code>sub</code> to <code>difference</code>, <code>mul</code> to <code>product</code>, <code>div</code> to <code>quotient</code>, <code>mod</code> to <code>modulus</code>, <code>neg</code> to <code>minus</code> </p> http://www.calormen.com/Logo/6 2008-08-21T12:00:00-08:00 <p>Internal refactoring to simplify parsing</p> <p> Added <code>pos</code> and <code>heading</code> </p> http://www.calormen.com/Logo/5 2008-08-20T12:00:00-08:00 <p> Added <code>stop</code> and <code>towards</code> </p> <p> Fixed parsing of <code>setpos</code> inputs </p> <p>Inverted Y axis for absolute coordinate references (positive Y is now upwards)</p> http://www.calormen.com/Logo/4 2008-08-19T12:00:00-08:00 <p> Can't use <code>lt</code> for both "left turn" and "less than". The latter is now <code>lth</code> </p> <p> Added <code>make</code>, <code>setxy</code>, <code>setx</code>, <code>sety</code>, <code>setheading</code>. Updated <code>setpos</code> </p> <p>Fixed negative number parsing</p> <p>Added toggle to multiline display</p> <p> Corrected <code>repcount</code> behavior for nested repeats </p> http://www.calormen.com/Logo/3 2008-08-18T12:00:00-08:00 <p>Added mathematical and logical operations</p> http://www.calormen.com/Logo/2 2008-08-17T12:00:00-08:00 <p> Added <code>if</code>, <code>ifelse</code>, <code>repcount</code>, <code>clean</code>, <code>home</code>, <code>showturtle</code>, <code>hideturtle</code> </p> <p>Added procedure inputs</p> <p>Added display of the turtle</p> <p> Had <code>left</code> and <code>right</code> switched. Oops. </p> http://www.calormen.com/Logo/1 2008-08-16T12:00:00-08:00 <p>Written and published</p>