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BQN: Difference between revisions
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'''BQN''' is an APL-family language designed primarily by [[Marshall Lochbaum]]. Although it maintains the concept of array-driven computing and much of APL's array functionality, BQN discards all [[backwards compatibility|compatibility]] with other array languages and changes many fundamental concepts. It uses the [[based array model]] with dedicated [[array notation]], distinguishes between data types and expression roles to give the language a [[wikipedia:context-free grammar|context-free grammar]] with [[wikipedia:first-class function|first-class function]]s, and uses a new set of [[glyph]]s with different primitive pairings. The language uses the [[leading axis model]] and [[tacit programming]] as core paradigms. Its implementation is largely self-hosted, with an array-based compiler like [[Co-dfns]]. | '''BQN''' is an APL-family language designed primarily by [[Marshall Lochbaum]]. Although it maintains the concept of array-driven computing and much of APL's array functionality, BQN discards all [[backwards compatibility|compatibility]] with other array languages and changes many fundamental concepts. It uses the [[based array model]] with dedicated [[array notation]], distinguishes between data types and expression roles to give the language a [[wikipedia:context-free grammar|context-free grammar]] with [[wikipedia:first-class function|first-class function]]s, and uses a new set of [[glyph]]s with different primitive pairings. The language uses the [[leading axis model]] and [[tacit programming]] as core paradigms. Its implementation is largely self-hosted, with an array-based compiler like [[Co-dfns]]. | ||
== Primitives == | |||
=== Functions === | |||
{|class=wikitable | |||
! Glyph !! Monadic !! Dyadic | |||
|- | |||
| <source inline>+</source> || [[Conjugate]] || [[Add]] | |||
|- | |||
| <source inline>-</source> || [[Negate]] || [[Subtract]] | |||
|- | |||
| <source inline>×</source> || [[Sign]] || [[Multiply]] | |||
|- | |||
| <source inline>÷</source> || [[Reciprocal]] || [[Divide]] | |||
|- | |||
| <source inline>⋆</source> || [[Exponential]] || [[Power (function)|Power]] | |||
|- | |||
| <source inline>√</source> || [[Square Root]] || [[Root]] | |||
|- | |||
| <source inline>⌊</source> || [[Floor]] || [[Minimum]] | |||
|- | |||
| <source inline>⌈</source> || [[Ceiling]] || [[Maximum]] | |||
|- | |||
| <source inline>∧</source> || Sort Up || [[And]] | |||
|- | |||
| <source inline>∨</source> || Sort Down || [[Or]] | |||
|- | |||
| <source inline>¬</source> || [[Not]] || Span | |||
|- | |||
| <source inline>|</source> || [[Absolute Value]] || [[Residue|Modulus]] | |||
|- | |||
| <source inline>≤</source> || || [[Less Than or Equal to]] | |||
|- | |||
| <source inline><</source> || [[Enclose]] || [[Less Than]] | |||
|- | |||
| <source inline>></source> || [[Mix|Merge]] || [[Greater Than]] | |||
|- | |||
| <source inline>≥</source> || || [[Greater Than or Equal to]] | |||
|- | |||
| <source inline>=</source> || [[Rank]] || [[Equals]] | |||
|- | |||
| <source inline>≠</source> || [[Tally|Length]] || [[Not Equals]] | |||
|- | |||
| <source inline>≡</source> || [[Depth]] || [[Match]] | |||
|- | |||
| <source inline>≢</source> || [[Shape]] || [[Not Match]] | |||
|- | |||
| <source inline>⊣</source> || [[Identity]] || [[Left]] | |||
|- | |||
| <source inline>⊢</source> || [[Identity]] || [[Right]] | |||
|- | |||
| <source inline>⥊</source> || [[Ravel|Deshape]] || [[Reshape]] | |||
|- | |||
| <source inline>∾</source> || [[Raze|Join]] || [[Catenate|Join to]] | |||
|- | |||
| <source inline>≍</source> || Solo || Couple | |||
|- | |||
| <source inline>↑</source> || Prefixes || [[Take]] | |||
|- | |||
| <source inline>↓</source> || Suffixes || [[Drop]] | |||
|- | |||
| <source inline>↕</source> || [[Index Generator|Range]] || Windows | |||
|- | |||
| <source inline>»</source> || Nudge || Shift Before | |||
|- | |||
| <source inline>«</source> || Nudge Back || Shift After | |||
|- | |||
| <source inline>⌽</source> || [[Reverse]] || [[Rotate]] | |||
|- | |||
| <source inline>⍉</source> || [[Transpose]] || [[Transpose|Reorder axes]] | |||
|- | |||
| <source inline>/</source> || [[Indices]] || [[Replicate]] | |||
|- | |||
| <source inline>⍋</source> || [[Grade|Grade Up]] || [[Interval_Index|Bins Up]] | |||
|- | |||
| <source inline>⍒</source> || [[Grade|Grade Down]] || [[Interval_Index|Bins Down]] | |||
|- | |||
| <source inline>⊏</source> || First Cell || Select | |||
|- | |||
| <source inline>⊑</source> || [[First]] || Pick | |||
|- | |||
| <source inline>⊐</source> || Classify || [[Index of]] | |||
|- | |||
| <source inline>⊒</source> || [[Occurrence Count]] || [[Progressive Index of]] | |||
|- | |||
| <source inline>∊</source> || [[Unique Mask]] || [[Member of]] | |||
|- | |||
| <source inline>⍷</source> || [[Unique|Deduplicate]] || [[Find]] | |||
|- | |||
| <source inline>⊔</source> || Group Indices || Group | |||
|} | |||
=== Modifiers === | |||
[[Monadic operator|1-modifiers]] in BQN use superscript symbols, while [[Dyadic operator|2-modifiers]] use symbols with a circle, but not one with a line through it like <source inline>⌽</source> and <source inline>⍉</source>. | |||
{| | |||
|style="vertical-align:top"| | |||
{|class=wikitable | |||
! Glyph !! Name(s) | |||
|- | |||
| <source inline>˙</source> || [[Constant]] | |||
|- | |||
| <source inline>˜</source> || [[Commute|Self/Swap]] | |||
|- | |||
| <source inline>˘</source> || Cells | |||
|- | |||
| <source inline>¨</source> || [[Each]] | |||
|- | |||
| <source inline>⌜</source> || [[Outer Product|Table]] | |||
|- | |||
| <source inline>⁼</source> || Undo | |||
|- | |||
| <source inline>´</source> || [[Reduce|Fold]] | |||
|- | |||
| <source inline>˝</source> || [[Reduce|Insert]] | |||
|- | |||
| <source inline>`</source> || [[Scan]] | |||
|} | |||
|style="vertical-align:top"| | |||
{|class=wikitable | |||
! Glyph !! Name(s) | |||
|- | |||
| <source inline>∘</source> || [[Atop]] | |||
|- | |||
| <source inline>○</source> || [[Over]] | |||
|- | |||
| <source inline>⊸</source> || [[Before]]/[[Bind]] | |||
|- | |||
| <source inline>⟜</source> || [[After]]/[[Bind]] | |||
|- | |||
| <source inline>⌾</source> || [[Under]] | |||
|- | |||
| <source inline>⊘</source> || Valences | |||
|- | |||
| <source inline>◶</source> || Choose | |||
|- | |||
| <source inline>⎉</source> || [[Rank (operator)|Rank]] | |||
|- | |||
| <source inline>⚇</source> || [[Depth (operator)|Depth]] | |||
|- | |||
| <source inline>⍟</source> || [[Power (operator)|Repeat]] | |||
|} | |||
|} | |||
{{APL dialects}}[[Category:BQN| ]][[Category:Array languages]][[Category:Based array languages]][[Category:Leading axis languages]][[Category:Languages with tacit programming]] | {{APL dialects}}[[Category:BQN| ]][[Category:Array languages]][[Category:Based array languages]][[Category:Leading axis languages]][[Category:Languages with tacit programming]] | ||