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Extracting a Sublist

Revision as of 15:02, 14 July 2007 by Alexaandru (Talk | contribs)


Given a list, extract a segment specified by a start and an end index (inclusive).


Use the lists module sublist/2 or sublist/3 functions. The sublist/2 function takes the first N elements from a list, while the sublist/3 function takes a starting and ending point in the list.

% Take the first 5 elements of a list
1> L = [1,2,3,4,5,6,7,8,9,10].
2> lists:sublist(L,5).

% Take 5 elements from a list, starting from the third position.
3> lists:sublist(L,3,5).

Please note that all functions assume the position numbering starts at 1.