Sums of pairs
Write a function that takes a collection of numbers and a target number. Return all pairs of numbers found in the collection that sum up to the target number.
Examples
(sums-of-pairs [2 4 5 6] 8) ;=> [[2 6]]
(sums-of-pairs [3 2 0 1 1 5] 5) ;=> [[2 3] [0 5]]
(sums-of-pairs [1 3 2 3 4 5] 7) ;=> [[3 4] [3 4] [2 5]]
Notes
- There can be duplicate numbers.
- Each pair should be sorted.
Thanks to this site for the challenge idea where it is considered Expert level in JavaScript.
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