论坛 › Erlang › lists:flatmap

shijiang1130 发表于 2015-05-29 20:25

lists:flatmap

1> A=[["192.168.1.1"],["192.168.1.2"],["192.168.1.3"]].
[["192.168.1.1"],["192.168.1.2"],["192.168.1.3"]]
2> lists:flatten(A).
"192.168.1.1192.168.1.2192.168.1.3"
3> 显然这不是我们想要的结果

shijiang1130 发表于 2015-05-29 20:26

3> lists:flatmap(fun(M)->M end,A).
["192.168.1.1","192.168.1.2","192.168.1.3"]
4>

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