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POErlang - Split a list into lists based on value
 

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  1. POErlang - Split a list into lists based on value
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    <p>I am trying to split this list</p> <pre><code>List = [[&lt;&lt;"5"&gt;&gt;, &lt;&lt;"54"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;, &lt;&lt;"54"&gt;&gt;, &lt;&lt;"45"&gt;&gt;, &lt;&lt;"55"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;],[ &lt;&lt;"5"&gt;&gt;]] </code></pre> <p>into </p> <pre><code>List = [[&lt;&lt;"5"&gt;&gt;, &lt;&lt;"54"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;, &lt;&lt;"54"&gt;&gt;, &lt;&lt;"45"&gt;&gt;, &lt;&lt;"55"&gt;&gt;], [&lt;&lt;"5"&gt;&gt;]] </code></pre> <p>Basically based on the &lt;&lt;"00">></p> <p>What is the best BIF to go about this, I have some code, but its sloppy, and Im trying to learn.</p> <p>Thanks</p> <p>EDIT:</p> <p>Tried the following, does not work</p> <p>Done2 = lists:splitwith( [&lt;&lt;"00">>], Done1),</p> <p>EDIT: This Line works!</p> <pre><code>7&gt; lists:splitwith(fun(A) -&gt; A == [&lt;&lt;"00"&gt;&gt;] end, List). {[], [[&lt;&lt;"5"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;,&lt;&lt;"54"&gt;&gt;,&lt;&lt;"45"&gt;&gt;,&lt;&lt;"55"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;], [&lt;&lt;"5"&gt;&gt;]]} </code></pre> <p>However I need something a little more complicated: like when the delim is [&lt;&lt;"00">>,&lt;&lt;"23">>]</p> <pre><code>9&gt; List = [[&lt;&lt;"5"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"5"&gt; &gt;], [&lt;&lt;"00"&gt;&gt;, &lt;&lt;"23"&gt;&gt;]]. [[&lt;&lt;"5"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"5"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;]] 10&gt; lists:splitwith(fun(A) -&gt; A == [&lt;&lt;"00"&gt;&gt;] end, List). {[], [[&lt;&lt;"5"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"5"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;]]} 11&gt; lists:splitwith(fun(A) -&gt; A == [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;] end, List). {[], [[&lt;&lt;"5"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;], [&lt;&lt;"35"&gt;&gt;,&lt;&lt;"54"&gt;&gt;], [&lt;&lt;"5"&gt;&gt;], [&lt;&lt;"00"&gt;&gt;,&lt;&lt;"23"&gt;&gt;]]} 12&gt; </code></pre> <p>No luck there</p>
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    1. COaccording to this link http://www3.erlang.org/doc/man/lists.html#split-2 , u need to use splitwith
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      1. USHaim Evgi
    2. COIt doesn't seem that `lists:splitwith(fun(A) -> A == [<<"00">>] end, List).` returns what you ask for in your question. Result is not same as what you have in your second `List`. Second lists is not spitted at all. It seems like with `[<<"00">>]` removed. Can you define what would you like more precisely?
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      1. USHynek -Pichi- Vychodil
 

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