Extracting a Sublist
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Given a list, extract a segment specified by a start index and an optional length.
Use the lists:sublist/2 or lists:sublist/3 functions. The lists:sublist/2 function takes the first N elements from a list, while the lists:sublist/3 function takes a starting point in the list and the maximum number of elements to extract.
% Take the first 5 elements of a list 1> L = [1,2,3,4,5,6,7,8,9,10]. [1,2,3,4,5,6,7,8,9,10] 2> lists:sublist(L,5). [1,2,3,4,5] % Take 5 elements from a list, starting from the third position. 3> lists:sublist(L,3,5). [3,4,5,6,7]
Please note that all functions assume the position numbering starts at 1.