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Mnemonics: Difference between revisions
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'''Mnemonics''' can assist with remembering the meaning of APL [[glyph]]s where on they keyboard they are found for [[typing glyphs|typing them]]. Both of these skills are essential for an effective APL programmer. This article currently provides examples such aide-mémoires, but will be completed in due time. | '''Mnemonics''' can assist with remembering the meaning of APL [[glyph]]s where on they keyboard they are found for [[typing glyphs|typing them]]. Both of these skills are essential for an effective APL programmer. This article currently provides examples such aide-mémoires, but will be completed in due time. | ||
== Pairing glyphs with their meaning == | == Pairing glyphs with their meaning == | ||
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<source lang=apl inline>⌺</source> looks like a <source lang=apl inline>⋄</source>-shaped [[Stencil]] laid on a piece of paper, <source lang=apl inline>⎕</source>. | <source lang=apl inline>⌺</source> looks like a <source lang=apl inline>⋄</source>-shaped [[Stencil]] laid on a piece of paper, <source lang=apl inline>⎕</source>. | ||
<source lang=apl inline> | <source lang=apl inline>@</source> applies a function or substitutes elements ''[[at]]'' specific locations. | ||
<source lang=apl inline>⌶</source> ([[I-beam]]) calls system services. APL was originally developed at [[IBM]], so system services were also IBM services. <source lang=apl inline>⌶</source> is an [[wikipedia:I-beam|I-beam]] and ''I-beam'' is pronounced almost identically to ''IBM''. | |||
[[File:Bristol Type 223 top-view silhouette.png|thumb|upright=0.5|right|The [[Grade]] glyphs look like [[wikipedia:supersonic transport|supersonic transport]]s.]] | |||
<source lang=apl inline>⍋</source> and <source lang=apl inline>⍒</source> give the indices ([[grade]]s) needed to sort ascending and descending respectively, and look like an ascending and descending supersonic transport, respectively. | <source lang=apl inline>⍋</source> and <source lang=apl inline>⍒</source> give the indices ([[grade]]s) needed to sort ascending and descending respectively, and look like an ascending and descending supersonic transport, respectively. | ||
<source lang=apl inline>⌽</source>, <source lang=apl inline>⊖</source>, and <source lang=apl inline>⍉</source> [[reverse]] or [[transpose]] an array over a given [[axis]]. The <source lang=apl inline>○</source> part of the glyphs symbolise the array, while the line component (<source lang=apl inline>|</source>, <source lang=apl inline>\</source>, or <source lang=apl inline>-</source>) indicates the line across which the reversal/transposal is done. | <source lang=apl inline>⌽</source>, <source lang=apl inline>⊖</source>, and <source lang=apl inline>⍉</source> [[reverse]] or [[transpose]] an array over a given [[axis]]. The <source lang=apl inline>○</source> part of the glyphs symbolise the array, while the line component (<source lang=apl inline>|</source>, <source lang=apl inline>\</source>, or <source lang=apl inline>-</source>) indicates the line across which the reversal/transposal is done. | ||
[[File:TreeLog.jpg|thumb|upright=0.5|right|The [[log]] glyph looks like a tree log.]] | |||
<source lang=apl inline>⍟</source> looks like the cross-section of a tree log | |||
<source lang=apl inline>⍱</source> and <source lang=apl inline>⍲</source> have the [[Not]] glyph <source lang=apl inline>~</source> on top of or overlaid on the [[Or]] glyph <source lang=apl inline>∨</source> and [[And]] glyph <source lang=apl inline>∧</source> respectively. | |||
<source lang=apl inline>⌹</source> is [[matrix divide]] with a <source lang=apl inline>⎕</source> symbolising a matrix and an inscribed <source lang=apl inline>÷</source> for "divide". | <source lang=apl inline>⌹</source> is [[matrix divide]] with a <source lang=apl inline>⎕</source> symbolising a matrix and an inscribed <source lang=apl inline>÷</source> for "divide". | ||