From 6ae1f2cf51868e2bd05ae47ec1cf09344dc1393b Mon Sep 17 00:00:00 2001 From: Robert Peterson Date: Tue, 16 Apr 2019 17:00:25 -0700 Subject: Add list:zip --- gen/src/list.erl | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'gen/src') diff --git a/gen/src/list.erl b/gen/src/list.erl index 97c0579..39a30a3 100644 --- a/gen/src/list.erl +++ b/gen/src/list.erl @@ -1,7 +1,7 @@ -module(list). -compile(no_auto_import). --export([length/1, reverse/1, is_empty/1, contains/2, head/1, tail/1, filter/2, map/2, traverse/2, drop/2, take/2, new/0, append/2, flatten/1, fold/3, fold_right/3, find/2, all/2, any/2]). +-export([length/1, reverse/1, is_empty/1, contains/2, head/1, tail/1, filter/2, map/2, traverse/2, drop/2, take/2, new/0, append/2, flatten/1, fold/3, fold_right/3, find/2, all/2, any/2, zip/2]). length(A) -> erlang:length(A). @@ -201,3 +201,15 @@ any(List, F) -> true end end. + +zip(L1, L2) -> + case {L1, L2} of + {[], _} -> + []; + + {_, []} -> + []; + + {[X1 | Rest1], [X2 | Rest2]} -> + [{X1, X2} | zip(Rest1, Rest2)] + end. -- cgit v1.2.3