Wolfram Function Repository
Instant-use add-on functions for the Wolfram Language
Function Repository Resource:
Delete the elements of some lists from a list x without changing either the order of x or the multiplicities of its elements
ResourceFunction["UnsortedComplement"][list, del1,del2, …] deletes from listany occurrence of an element of the del1,del2,… without otherwise changing list. |
Deleting with several lists is equivalent to deleting with their Join:
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Use equivalence classes based on absolute value:
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This considers elements the same if they are identical modulo 3:
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These are the deleted elements:
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Here there is no second list, so nothing is deleted:
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Complement deletes elements, reduces remaining elements to one occurrence of each, and sorts:
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UnsortedComplement only deletes elements:
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Make two lists:
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Union deletes duplicates and sorts:
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Wolfram Language 11.3 (March 2018) or above
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