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        "author": "Pannous",
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        "description": "![ENGLISH SCRIPT](English script.png \"ENGLISH SCRIPT\")\n\n**[Angle](https://github.com/pannous/angle/)** is the Python implementation of [English](https://github.com/pannous/english-script) as a programming language.\nThe main purpose of this language is to make programming accessible to many more people, more fun and to facilitate programming computers via voice.\n\nINSTALL\n-------\n\n`pip install angle`\n<!-- `pip install anglang` -->\n\nOR from source:\n\n`git clone --recursive git@github.com:pannous/angle.git`\n\n`cd angle`\n\n`./install.sh`\n\nStart the shell : `./bin/angle` \n\nExamples\n--------\nHere are some of our favorite working examples from the [tests](tests):\n\n`assert two minus 1\u00bd equals 0.5`\n\n`beep three times`\n(There will be a generation of programmers who will shake their heads that there ever was a programming language which did not interpret that sentence correctly.)\n\n`assert square of [1,2 and 3] equals 1,4,9`\n\n`assert 3rd word in 'hi my friend' is 'friend'`\n\n`x is 2; if all 0,2,4 are smaller 5 then increase x; assert x equals 3 `\n\n`beep every three seconds`\n\n`last item in 'hi','you' is equal to 'you'`\n\n\n```\nWhile Peter is online on Skype\n\tmake a beep\n\tsleep for 10 seconds\nDone\n```\n\n```\nTo check if person is online on Skype:\n\tSkype.checkStatus(person)\n\tif result is \"online\": return yes \n\telse return no\nEnd\n```\n\nStatus:\n-----------\n\nALPHA, partly usable, some [tests](tests) not yet passing: \n[![Build Status](https://travis-ci.org/pannous/angle.png)](https://travis-ci.org/pannous/angle)\n\nIn progress\n-----------\n\n`add one to every odd number in 1,2,3 == 2,2,4`\n\nThe implicit list filter '**that**' applies a selection criterion to all elements. \n\n`delete all files in my home folder that end with 'bak'` \n\ntranslates to ruby:\n\n`folder(:home).files.select{|that|that.end_with?(\"bak\")}.each{|file| file.delete}`\n\n\nImplicit lambda variable '**it**' \n\n`for all mails by peter: mark it as read if its subject contains 'SPAM'` \n\ntranslates to ruby:\n\n`mails(by: Peter).each{|it| it.mark(:read) if it.subject.match('SPAM')}`\n\n\nThe last example also illustrates what we call **matching by type name**.\n```\nTo delete mail:\n  move that mail to trash folder\nEnd\n```\nHere 'mail' acts as argument name and argument type at once.\nNo more Java style Mail mail=new Mail().getMail();\n\n\n<!-- Self documenting code is not about the \"how\", it's about the \"what\". Ex: A method name should be FilterOutOddNumbers(). Not MapModulo2Predicate(). -->\n\nEXPERIMENT\n----------\nRun it and see yourself!\n\n**experiment** by typing\n\n`./bin/angle \"6 plus six\"`\n\n`./bin/angle examples/test.e`\n\n`./bin/angle` (no args to start the shell)\n\n`\u29a0 1/4`\n\n`\u29a0 6 plus six`\n\n`\u29a0 beep three times`\n\n`\u29a0 x is 2; if all 0,2,4 are smaller 5 then increase x`\n\n\n\nLanguage Specification\n----------------------\nAngle is a multi-paradigm programming language with [gradual typing](https://en.m.wikipedia.org/wiki/Gradual_typing).\n\nRead the [DOSSIER](https://github.com/pannous/english-script/blob/master/DOSSIER.md) for a more complete [**language specification**](https://github.com/pannous/english-script/blob/master/DOSSIER.md), vision and some background. \n\nThe grammar is not meant to be linguistically complete, but [functionality complete](https://en.wikipedia.org/wiki/Functional_completeness) and easily extendable.\n\"Premature optimization is the root of all evil.\" Many programming languages 'optimize' on the syntax level in order to optimize the resulting applications. Maybe [this](http://www.cs.utexas.edu/~EWD/transcriptions/EWD06xx/EWD667.html) is a mistake.\n\nTo check out the current capabilities of English Script have a look at the [tests](https://github.com/pannous/angle/tree/master/tests),\n[keywords](https://github.com/pannous/angle/blob/master/core/english_tokens.py) and\n[grammar](https://github.com/pannous/angle/blob/master/core/english_parser.py)\n\nFuture\n------\nEnglish Script / Angle is currently running in the \n* [ruby](https://github.com/pannous/english-script) and [python](https://github.com/pannous/angle) environment, but will soon compile to the \n* WEB(!!) thanks to [WebAssembly](https://github.com/WebAssembly/design)\n* JVM thanks to [Mirah](https://github.com/mirah/mirah), [zippy](https://bitbucket.org/ssllab/zippy/overview) and [truffle](https://github.com/OracleLabs/Truffle)\n* [.Net/CLR/DLR](https://en.wikipedia.org/wiki/Dynamic_Language_Runtime) (via [Cecil](https://github.com/jbevain/cecil), maybe Mirah too), \n* As a final aim: run **natively**, maybe similar to [Crystal](https://github.com/manastech/crystal), [Vala](https://en.wikipedia.org/wiki/Vala_%28programming_language%29) or RPython\n\nHaving a [self-hosted \"bootstrapped\" compiler](https://en.wikipedia.org/wiki/Bootstrapping_%28compilers%29) is an important mid-term goal.\n\n**precedence**\nOne very hot idea is to allow modifying the language grammar on the fly, at least till a limited extend.\nOne first step would be to make possible setting the precedence of functions.\nThis would enable very natural and sweet mathematical expressions, especially combined with Unicode names:\n```\nclass Complex alias \u2102 (re, im)\n\tto add number x\n\t\t\u2102(this.real+x.real, this.im+x.im)\n\tend\n\talias '+' = add\nend\t\n\u2102.add.precedence=Number.add.precedence-1\n\u012b := \u221a-1\n\u012b + 3\u012b == 4\u012b\n```\nThis would run against the goal to avoid sigil special chars though.\n\n\n\nWhy the new python implementation\n------------------------------------\nWe can **compile** English script / [Angle](https://github.com/pannous/angle/) directly to python byte-code:\nAs opposed to Ruby, Python(3) comes with a very nice and clean abstract syntax tree as well as byte code capabilities preinstalled.\nCompiling is so much nicer & faster than interpreted code.\nAlso the Python execution model is a bit more friendly than the Ruby VM, but both have their [advantages and drawbacks](https://github.com/pannous/cast/blob/master/ruby-vs-python.txt). The biggest advantage of Python is that objects can be given attributes at any time o.x='y'! However pythons limited lamda capabilities are a painful limitation. \n\n\n\"There should be one-- and preferably only one --obvious way to do it\"\nBeautiful is better than ugly.\nExplicit is better than implicit.\nSimple is better than complex.\nComplex is better than complicated.\nFlat is better than nested.\t\t\t\n\nFor a background story/vision/philosophy/future of this project read the [DOSSIER](https://github.com/pannous/english-script/tree/master/DOSSIER.md)\n",
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