Partitioned Enclose: Difference between revisions

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Partitioned Enclose (view source)

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{{Built-in|Partitioned Enclose|⊂}} is a [[dyadic function]] which splits its right argument into differently sized pieces as determined by the non-negative integer<ref group=note name=max>Most dialects restrict this number to a maximum of 1.</ref> left argument.
{{Built-in|Partitioned Enclose|⊂}} is a [[dyadic function]] which splits its right argument into differently sized pieces as determined by the left argument.


On a vector right argument, the corresponding element in the left argument indicates how many<ref group=note name=max></ref> '''divisions''' to begin there:
In the simplest case, and on a vector right argument, the corresponding element in the left argument indicates where <ref group=note name=max></ref> '''divisions''' begin:
<source lang=apl>
<source lang=apl>
       1 0 1 0 0 0 0⊂'HiEarth'
       1 0 1 0 0 0 0⊂'HiEarth'
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</source>
</source>
{{Works in|[[Dyalog APL]]}}
{{Works in|[[Dyalog APL]]}}
Empty divisions can be inserted by beginning more than 1 division at a particular index<ref group=note name=not>Most dialects do not support this.</ref>:
Almost all dialects restrict the left argument to provide only this functionality. However, the left argument can be interpreted as a count of how many partitions begin with a particular position:
<source lang=apl>
<source lang=apl>
       2 0 3 0 0 0 0⊂'HiEarth'
       2 0 3 0 0 0 0⊂'HiEarth'
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└┴──┴┴┴─────┘
└┴──┴┴┴─────┘
</source>
</source>
Additional trailing empty divisions are created by adding an additional division count corresponding to the index beyond the end of the right argument<ref group=note name=not></ref>:
Additional trailing empty divisions are thus created by adding an additional division count corresponding to the index beyond the end of the right argument<ref group=note name=not></ref>:
<source lang=apl>
<source lang=apl>
       1 0 1 0 0 0 0 1⊂'HiEarth'
       1 0 1 0 0 0 0 1⊂'HiEarth'
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└──┴─────┴┘
└──┴─────┴┘
</source>
</source>
Partitioned Enclose allows a simple definition<ref group=note>In dialects that implement the full functionality of Partitioned Enclose.</ref> of a split-into-lengths function:
This interpretation allows a simple definition of a split-into-lengths function:


[https://tio.run/##SyzI0U2pTMzJT9dNrShJzUtJTfn/qLdP/VHf1GBXvZRHbROqNQxtH3UufNS7S/NRx/JHvWvAnC1AvhVQEVABkJWSVqJg8Ki7BSKQkllcABSshQgAjdEAUuHB6uquZal5JerqGurqwanFxZn5eQFFmSABBXX1FHV1zUddi4EKnSOBvLS8YqCA@v/ggpzMEpAjHvVuVXjU1fSod4XCo94dj3oXH1pvqKAdowCkHrVNNtQB2ff/v7GCsYKJAliTgrpHfrljUWpkfqm9OgA Try it online!]
[https://tio.run/##SyzI0U2pTMzJT9dNrShJzUtJTfn/qLdP/VHf1GBXvZRHbROqNQxtH3UufNS7S/NRx/JHvWvAnC1AvhVQEVABkJWSVqJg8Ki7BSKQkllcABSshQgAjdEAUuHB6uquZal5JerqGurqwanFxZn5eQFFmSABBXX1FHV1zUddi4EKnSOBvLS8YqCA@v/ggpzMEpAjHvVuVXjU1fSod4XCo94dj3oXH1pvqKAdowCkHrVNNtQB2ff/v7GCsYKJAliTgrpHfrljUWpkfqm9OgA Try it online!]
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</source>
</source>
{{Works in|[[Extended Dyalog APL]]}}
{{Works in|[[Extended Dyalog APL]]}}
==Notes==
<references group="note"/>
==External links==
==External links==
===Tutorials===
===Tutorials===
Retrieved from ‘https://aplwiki.com/wiki/Special:MobileDiff/2562’

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