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  1. PO
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    <p>phg already provided a nice LPeg solution for your question but here's another one using LPeg's re module. The syntax is closer to BNF and the operators used are more 'regex' like so this solution may be easier to grok.</p> <pre><code>re = require 're' function dump(t) io.write '{' for _, v in ipairs(t) do io.write(v, ',') end io.write '}\n' end local textformat = [[ data_in &lt;- block+ block &lt;- text '[' block_content ']' block_content &lt;- {| data_arr |} / (block / text)* data_arr &lt;- (text ':' nums whitesp)+ text &lt;- whitesp [%w' ']+ whitesp nums &lt;- (' '+ {digits} -&gt; tonumber)+ digits &lt;- %d+ whitesp &lt;- %s* ]] local parser = re.compile(textformat, {tonumber = tonumber}) local arr1, arr2 = parser:match(data) dump(arr1) dump(arr2) </code></pre> <p>Each block of data array gets captured into a separate table and returned as one of the outputs by <code>match</code>.</p> <p>With <code>data</code> being the same input as above, two blocks are matched and captured and so 2 tables are returned. Inspecting these two tables gives:</p> <blockquote> <p>{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,343,3938,9433,8756,6270,4472,3182,2503, 1768,1140,836,496,326,273,349,269,144,121,94,82,64,80,66,59,56,47,50,46,64,35,42 ,53,42,40,41,34,35,41,39,39,47,30,30,39,12345,} {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,212,3079,8890,8941,6177,4359,3625,2420, 1639,974,594,438,323,286,318,296,206,132,96,85,65,73,62,53,47,55,49,52,29,44,44, 41,43,36,50,36,40,30,29,40,35,30,25,31,47,31,25,29,24,30,35,31,28,31,17,37,35,30 ,20,33,28,20,37,25,21,23,25,36,27,35,22,23,15,24,34,28,}</p> </blockquote>
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    1. POParsing out multiple lines with LPeg in Lua
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    1. PTAnswer
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    1. USgreatwolf
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    1. VO
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      1. This table or related slice is empty.
      1. VTUpMod
    1. COcould you pls help me to read updated text timestamp out?
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      1. USDecula
    2. COI found [this](http://fanf.livejournal.com/97572.html) deal with timestamp with BNF style LPeg... But I failed to implement it.
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      1. USDecula
    3. CO@Decula Note the above grammar is only a rough approximation of how to parse the input, based on eyeballing the input from your original question. Since you know better the extent of the format being parsed, you should refine the grammar to better match it.
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      1. USgreatwolf
 

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