(no subject)

[Phil Haymen]

hi,I have a function, using list comprehension to pick
out the head and last elements from a list of lists
and output this into a list without duplicates. It
doesn't work. I want to know what is the error. 

function :: [[Int]] -> [Int] 
function seg = nub (concat([head s, last s | s <-
seg])  

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