Talk:Nub Sieve: Difference between revisions

Talk:Nub Sieve (view source)

447 bytes added , 14:13, 21 July 2023

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Revision as of 02:06, 21 July 2023 (view source) ⊂⍺m (talk \| contribs) (but why use the index-in-nub at all?) ← Older edit		Revision as of 14:13, 21 July 2023 (view source) Marshall (talk \| contribs) No edit summary Newer edit →
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	:: Ah. So, ok, that explains the <syntaxhighlight lang=apl inline>1/⊢</syntaxhighlight>… but why do index-in-nub before doing <syntaxhighlight lang=apl inline>⍳⍤≢=⍳⍨</syntaxhighlight>? why not just the naive <syntaxhighlight lang=apl inline>(⍳⍤≢=⍳⍨)⍤(1/⊢)</syntaxhighlight>?"		:: Ah. So, ok, that explains the <syntaxhighlight lang=apl inline>1/⊢</syntaxhighlight>… but why do index-in-nub before doing <syntaxhighlight lang=apl inline>⍳⍤≢=⍳⍨</syntaxhighlight>? why not just the naive <syntaxhighlight lang=apl inline>(⍳⍤≢=⍳⍨)⍤(1/⊢)</syntaxhighlight>?"

			::: Compare results on <syntaxhighlight lang=apl inline>3+⎕CT×⍳10</syntaxhighlight>: the value indicated by <syntaxhighlight lang=apl inline>⍳⍤≢=⍳⍨</syntaxhighlight> doesn't match all argument elements, so it can't be said to reduce the entire argument to unique values. There's a short section on this [[Unique#Tolerant_comparison\|for Unique]]. --[[User:Marshall\|Marshall]] ([[User talk:Marshall\|talk]]) 14:13, 21 July 2023 (UTC)