sequences.lib-docs: remove sigma and count
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4977d4a224
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07315431c8
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@ -19,25 +19,6 @@ HELP: each-withn
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}
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{ $see-also map-withn } ;
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HELP: sigma
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{ $values { "seq" sequence } { "quot" quotation } { "n" number } }
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{ $description "Like map sum, but without creating an intermediate sequence." }
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{ $example
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"! Find the sum of the squares [0,99]"
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"USING: math math.ranges sequences.lib prettyprint ;"
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"100 [1,b] [ sq ] sigma ."
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"338350"
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} ;
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HELP: count
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{ $values { "seq" sequence } { "quot" quotation } { "n" integer } }
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{ $description "Efficiently returns the number of elements that the predicate quotation matches." }
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{ $example
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"USING: math math.ranges sequences.lib prettyprint ;"
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"100 [1,b] [ even? ] count ."
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"50"
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} ;
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HELP: if-seq
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{ $values { "seq" sequence } { "quot1" quotation } { "quot2" quotation } }
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{ $description "Makes an implicit check if the sequence is empty. If the sequence has any elements, " { $snippet "quot1" } " is called on it. Otherwise, the empty sequence is dropped and " { $snippet "quot2" } " is called." }
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