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macintux/replace_list_item.erl

Created February 20, 2015 15:31
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  1. macintux created this gist Feb 20, 2015.
    6 changes: 6 additions & 0 deletions replace_list_item.erl
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    Original file line number Diff line number Diff line change
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    %% Replace the item at `Index' in `List' with `Element'.
    %% Zero-based indexing. Deal with it.
    -spec replace_list_element(non_neg_integer(), term(), list()).
    replace_list_element(Index, Element, List) ->
    {Prefix, Suffix} = lists:split(Index, List),
    Prefix ++ [Element] ++ tl(Suffix).