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Strand notation: Difference between revisions
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Several variations on stranding exist: | Several variations on stranding exist: | ||
* In [[Dyalog APL]], [[NARS2000]] and others, arrays are stranded before operator or function evaluation. | * In [[Dyalog APL]], [[NARS2000]], [[APL.68000]], and others, arrays are stranded before operator or function evaluation. | ||
* In [[APL2]], [[APLX]] and others, arrays are stranded after operator evaluation and bracket indexing, but before function evaluation. | * In [[APL2]], [[APLX]] and others, arrays are stranded after operator evaluation and bracket indexing, but before function evaluation. | ||
* In [[APL\360]], [[SHARP APL]] and [[J]] stranding is called '''vector notation''' and is a part of token formation rather than execution. Only plain numbers are stranded. | * In [[APL\360]], [[SHARP APL]] and [[J]] stranding is called '''vector notation''' and is a part of token formation rather than execution. Only plain numbers are stranded. | ||
* In [[A+]] a system equivalent to APL\360 is implemented, but is described as part of [[numeric literal]] notation. "Stranding" in A+ refers to vector notation using parentheses and semicolons <source lang=apl inline>(a;b;c)</source>. | * In [[A+]] a system equivalent to APL\360 is implemented, but is described as part of [[numeric literal]] notation. "Stranding" in A+ refers to vector notation using parentheses and semicolons <source lang=apl inline>(a;b;c)</source>. | ||
* [[BQN]] breaks [[backwards compatibility]] with APL and does not allow stranding by juxtaposition even for numbers. Instead, the "ligature" character <code>‿</code> is used for a more explicit variation of stranding. | |||
An example in which stranding interferes with the most obvious way of writing a program is shown below. Consider applying the function <source lang=apl inline>f</source> to <source lang=apl inline>0.8</source> three times using the [[Power operator]]: | An example in which stranding interferes with the most obvious way of writing a program is shown below. Consider applying the function <source lang=apl inline>f</source> to <source lang=apl inline>0.8</source> three times using the [[Power operator]]: | ||
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=== Documentation === | === Documentation === | ||
* [ | * [https://help.dyalog.com/latest/index.htm#Language/Introduction/Variables/Vector%20Notation.htm Dyalog] | ||
* [http://microapl.com/apl_help/ch_020_010_130.htm APLX] | * [http://microapl.com/apl_help/ch_020_010_130.htm APLX] | ||
{{APL syntax}}[[Category:APL syntax]][[Category:Nested array model]] | {{APL syntax}}[[Category:APL syntax]][[Category:Nested array model]] | ||