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'''ngn/apl''' is an APL bytecode compiler and interpreter by [[Nick Nickolov]]. Because it is implemented in [[wikipedia:Javascript|Javascript]], it can be run in [[wikipedia:Node.js|Node.js]] or any modern browser.
'''ngn/apl''' is an APL bytecode compiler and interpreter by [[Nick Nickolov]]. Because it is implemented in [[wikipedia:Javascript|Javascript]], it can be run in [[wikipedia:Node.js|Node.js]] or any modern browser.


ngn/apl supports most of the core language of [[Dyalog APL 14.0]],: [[dfn]]s (<source lang=apl inline>{⍺ ⍵}</source>), [[nested array]]s, [[complex number]]s (<source lang=apl inline>1j2</source>), [[Function train|forks and atops]], [[Multiple assignment|strand assignment]] (<source lang=apl inline>(a b)←c</source>), [[indexed assignment]] (<source lang=apl inline>a[b]←c</source>), and [[dop|user-defined operators]] (<source lang=apl inline>{⍺⍺ ⍵⍵}</source>), but does not support [[Key]] (<source lang=apl inline>⌸</source>), [[Rank (operator|Rank (operator]] (<source lang=apl inline>⍤</source>) [[tradfn]]s (<source lang=apl inline>∇R←X f Y</source>), non-zero [[index origin]] (<source lang=apl inline>⎕IO←1</source>), [[comparison tolerance]] (<source lang=apl inline>⎕CT</source>), [[prototype]]s (it always uses zero as fill), [[modified assignment]] (<source lang=apl inline>x+←1</source>), [[keyword]]s (<source lang=apl inline>:If</source>), [[object-oriented programming]], or [[namespace]]s. It extends Dyalog APL with [[Infinity|infinities]] (<source lang=apl inline>¯</source> or <source lang=apl inline>∞</source>) and a few additoinal primitives.
ngn/apl supports most of the core language of [[Dyalog APL 14.0]],: [[dfn]]s (<source lang=apl inline>{⍺ ⍵}</source>), [[nested array]]s, [[complex number]]s (<source lang=apl inline>1j2</source>), [[Function train|forks and atops]], [[Multiple assignment|strand assignment]] (<source lang=apl inline>(a b)←c</source>), [[indexed assignment]] (<source lang=apl inline>a[b]←c</source>), and [[dop|user-defined operators]] (<source lang=apl inline>{⍺⍺ ⍵⍵}</source>), but does not support [[Key]] (<source lang=apl inline>⌸</source>), [[Rank (operator)|Rank (operator]] (<source lang=apl inline>⍤</source>) [[tradfn]]s (<source lang=apl inline>∇R←X f Y</source>), non-zero [[index origin]] (<source lang=apl inline>⎕IO←1</source>), [[comparison tolerance]] (<source lang=apl inline>⎕CT</source>), [[prototype]]s (it always uses zero as fill), [[modified assignment]] (<source lang=apl inline>x+←1</source>), [[keyword]]s (<source lang=apl inline>:If</source>), [[object-oriented programming]], or [[namespace]]s. It extends Dyalog APL with [[Infinity|infinities]] (<source lang=apl inline>¯</source> or <source lang=apl inline>∞</source>) and a few additoinal primitives.


On December 27, 2020, Nickolov announced that he would discard his implementation.<ref>Nickolov, N. "ngn". [https://chat.stackexchange.com/transcript/message/56558504#56558504 Announcement]. [[APL Orchard]]. Stack Exchange chat.</ref> Soon after, [[Adám Brudzewsky]] took up the mantle of hosting the source and online demo.<ref>Brudzewsky, A. "Adám". [https://chat.stackexchange.com/transcript/message/56558600#56558600 Announcement]. [[APL Orchard]]. Stack Exchange chat.</ref>
On December 27, 2020, Nickolov announced that he would discard his implementation.<ref>Nickolov, N. "ngn". [https://chat.stackexchange.com/transcript/message/56558504#56558504 Announcement]. [[APL Orchard]]. Stack Exchange chat.</ref> Soon after, [[Adám Brudzewsky]] took up the mantle of hosting the source and online demo.<ref>Brudzewsky, A. "Adám". [https://chat.stackexchange.com/transcript/message/56558600#56558600 Announcement]. [[APL Orchard]]. Stack Exchange chat.</ref>

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