Strand notation: Difference between revisions
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Miraheze>Adám Brudzewsky No edit summary |
Miraheze>Adám Brudzewsky No edit summary |
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{| class=vertical-navbox style="float:right; font-size:500%; margin:0 1ex;" | |||
|<code>1 2 3</code> | |||
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'''Strand notation''', or '''stranding''', is the convention that multiple (more than one) arrays written next to each other are automatically combined into a [[vector]]. Stranding can make code easier to read by eliminating the need for punctuation when writing small arrays in APL. It can also cause frustration when programming if unrelated arrays are stranded together. This issue occurs when [[operator]]s are allowed to take array [[operand]]s, and can be resolved by inserting extra parentheses or [[identity function]]s into the expression. | '''Strand notation''', or '''stranding''', is the convention that multiple (more than one) arrays written next to each other are automatically combined into a [[vector]]. Stranding can make code easier to read by eliminating the need for punctuation when writing small arrays in APL. It can also cause frustration when programming if unrelated arrays are stranded together. This issue occurs when [[operator]]s are allowed to take array [[operand]]s, and can be resolved by inserting extra parentheses or [[identity function]]s into the expression. | ||
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f⍣3 0.8 | f⍣3 0.8 | ||
</source> | </source> | ||
In a language which strands before function application, this expression is equivalent to the derived function <source lang=apl inline>f⍣(3,0.8)</source>. Not what was intended! The two numbers must be separated somehow, for instance with parentheses or a [[tack function]]. | In a language which strands before function application, this expression is equivalent to the derived function <source lang=apl inline>f⍣(3,0.8)</source>. Not what was intended! The two numbers must be separated somehow, for instance with parentheses or a [[Identity|tack function]]. | ||
<source lang=apl> | <source lang=apl> | ||
(f⍣3)0.8 | (f⍣3)0.8 | ||