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Membership: Difference between revisions
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For [[nested array|nested arrays]], Membership tests for exact [[match]] between the elements. | For [[nested array|nested arrays]], Membership tests for exact [[match]] between the elements. | ||
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'CAT' 'DOG' 'MOUSE' ∊ 'CAT' 'FOX' 'DOG' 'LLAMA' | 'CAT' 'DOG' 'MOUSE' ∊ 'CAT' 'FOX' 'DOG' 'LLAMA' | ||
1 1 0 | 1 1 0 | ||
</ | </syntaxhighlight> | ||
=== Leading axis model === | === Leading axis model === | ||
The behavior of Membership was changed to follow [[leading axis model]] in some implementations such as [[J]] (spelled <source lang=j inline>e.</ | The behavior of Membership was changed to follow [[leading axis model]] in some implementations such as [[J]] (spelled <source lang=j inline>e.</syntaxhighlight>). In this case, if the right argument is a higher-[[rank]] array, the [[cell|cells]] of the left argument with appropriate rank are compared against the [[major cell|major cells]] of the right argument. | ||
<source lang=j> | <source lang=j> | ||
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In other dialects, a leading axis membership function can be defined as: | In other dialects, a leading axis membership function can be defined as: | ||
<source lang=apl> | <source lang=apl> | ||
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'able' Membership mat | 'able' Membership mat | ||
1 | 1 | ||
</ | </syntaxhighlight>{{Works in|[[Dyalog APL]], [[NARS2000]], [[dzaima/APL]], [[Extended Dyalog APL]], [[GNU APL]]}} | ||
== See also == | == See also == | ||