erlang take(String, Characters)用法及代码示例

take(String, Characters) -> {Leading, Trailing}

OTP 20.0

take(String, Characters, Complement) -> {Leading, Trailing}

OTP 20.0

take(String, Characters, Complement, Dir) -> {Leading, Trailing}

OTP 20.0

类型：

String = unicode:chardata()

Characters = [grapheme_cluster()]

Complement = boolean()

Dir = direction()

Leading = Trailing = unicode:chardata()

从 String 中获取字符，只要这些字符是集合 Characters 的成员或集合 Characters 的补集。 Dir 可以是 leading 或 trailing ，指示要从哪个方向获取字符。

例子：

5> string:take("abc0z123", lists:seq($a,$z)).
{"abc","0z123"}
6> string:take(<<"abc0z123">>, lists:seq($0,$9), true, leading).
{<<"abc">>,<<"0z123">>}
7> string:take("abc0z123", lists:seq($0,$9), false, trailing).
{"abc0z","123"}
8> string:take(<<"abc0z123">>, lists:seq($a,$z), true, trailing).
{<<"abc0z">>,<<"123">>}

相关用法

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