2map-reduce ( ..a seq1 seq2 map-quot: ( ..a elt1 elt2 -- ..a intermediate ) reduce-quot: ( ..a prev intermediate -- ..a next ) -- ..a result ) (original) (raw)
Vocabulary
sequences
Inputs
| seq1 | a sequence |
|---|---|
| seq2 | a sequence |
| map-quot | a quotation with stack effect ( ..a elt1 elt2 -- ..a intermediate ) |
| reduce-quot | a quotation with stack effect ( ..a prev intermediate -- ..a next ) |
Outputs
Word description
Calls map-quot on each pair of elements from seq1 and seq2 and combines the results using reduce-quot in the same manner as reduce, except that there is no identity element, and the sequence must have a length of at least 1.
Errors
Throws an error if the sequence is empty.
Examples
USING: sequences prettyprint math ; { 10 30 50 } { 200 400 600 } [ + ] [ + ] 2map-reduce .
1290
Definition