15 lines
572 B
Factor
15 lines
572 B
Factor
USING: help.markup help.syntax sequences splitting strings ;
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IN: grouping.extras
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HELP: group-by
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{ $values { "seq" "a sequence" } { "quot" { $quotation "( ... elt -- ... key )" } } { "groups" "a new assoc" } }
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{ $description "Groups the elements by the key received by applying quot to each element in the sequence." }
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{ $examples
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{ $example
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"USING: grouping.extras unicode.data ;"
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"\"THis String Has CasE!\" [ category ] group-by [ last >string ] map ."
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"{ \"TH\" \"is\" \" \" \"S\" \"tring\" \" \" \"H\" \"as\" \" \" \"C\" \"as\" \"E\" \"!\" }"
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}
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} ;
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