<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <head> <title>Penlight Documentation</title> <link rel="stylesheet" href="../ldoc_fixed.css" type="text/css" /> </head> <body> <div id="container"> <div id="product"> <div id="product_logo"></div> <div id="product_name"><big><b></b></big></div> <div id="product_description"></div> </div> <!-- id="product" --> <div id="main"> <!-- Menu --> <div id="navigation"> <br/> <h1>Penlight</h1> <ul> <li><a href="../index.html">Index</a></li> </ul> <h2>Contents</h2> <ul> <li><a href="#Functions">Functions</a></li> </ul> <h2>Libraries</h2> <ul class="$(kind=='Topics' and '' or 'nowrap'"> <li><a href="../libraries/pl.html">pl</a></li> <li><a href="../libraries/pl.Set.html">pl.Set</a></li> <li><a href="../libraries/pl.app.html">pl.app</a></li> <li><a href="../libraries/pl.array2d.html">pl.array2d</a></li> <li><a href="../libraries/pl.class.html">pl.class</a></li> <li><a href="../libraries/pl.compat.html">pl.compat</a></li> <li><a href="../libraries/pl.comprehension.html">pl.comprehension</a></li> <li><a href="../libraries/pl.config.html">pl.config</a></li> <li><a href="../libraries/pl.data.html">pl.data</a></li> <li><a href="../libraries/pl.dir.html">pl.dir</a></li> <li><a href="../libraries/pl.file.html">pl.file</a></li> <li><a href="../libraries/pl.func.html">pl.func</a></li> <li><a href="../libraries/pl.import_into.html">pl.import_into</a></li> <li><strong>pl.input</strong></li> <li><a href="../libraries/pl.lapp.html">pl.lapp</a></li> <li><a href="../libraries/pl.lexer.html">pl.lexer</a></li> <li><a href="../libraries/pl.luabalanced.html">pl.luabalanced</a></li> <li><a href="../libraries/pl.operator.html">pl.operator</a></li> <li><a href="../libraries/pl.path.html">pl.path</a></li> <li><a href="../libraries/pl.permute.html">pl.permute</a></li> <li><a href="../libraries/pl.pretty.html">pl.pretty</a></li> <li><a href="../libraries/pl.seq.html">pl.seq</a></li> <li><a href="../libraries/pl.sip.html">pl.sip</a></li> <li><a href="../libraries/pl.strict.html">pl.strict</a></li> <li><a href="../libraries/pl.stringio.html">pl.stringio</a></li> <li><a href="../libraries/pl.stringx.html">pl.stringx</a></li> <li><a href="../libraries/pl.tablex.html">pl.tablex</a></li> <li><a href="../libraries/pl.template.html">pl.template</a></li> <li><a href="../libraries/pl.test.html">pl.test</a></li> <li><a href="../libraries/pl.text.html">pl.text</a></li> <li><a href="../libraries/pl.types.html">pl.types</a></li> <li><a href="../libraries/pl.url.html">pl.url</a></li> <li><a href="../libraries/pl.utils.html">pl.utils</a></li> <li><a href="../libraries/pl.xml.html">pl.xml</a></li> </ul> <h2>Classes</h2> <ul class="$(kind=='Topics' and '' or 'nowrap'"> <li><a href="../classes/pl.Date.html">pl.Date</a></li> <li><a href="../classes/pl.List.html">pl.List</a></li> <li><a href="../classes/pl.Map.html">pl.Map</a></li> <li><a href="../classes/pl.MultiMap.html">pl.MultiMap</a></li> <li><a href="../classes/pl.OrderedMap.html">pl.OrderedMap</a></li> </ul> <h2>Manual</h2> <ul class="$(kind=='Topics' and '' or 'nowrap'"> <li><a href="../manual/01-introduction.md.html">Introduction</a></li> <li><a href="../manual/02-arrays.md.html">Tables and Arrays</a></li> <li><a href="../manual/03-strings.md.html">Strings. Higher-level operations on strings.</a></li> <li><a href="../manual/04-paths.md.html">Paths and Directories</a></li> <li><a href="../manual/05-dates.md.html">Date and Time</a></li> <li><a href="../manual/06-data.md.html">Data</a></li> <li><a href="../manual/07-functional.md.html">Functional Programming</a></li> <li><a href="../manual/08-additional.md.html">Additional Libraries</a></li> <li><a href="../manual/09-discussion.md.html">Technical Choices</a></li> </ul> <h2>Examples</h2> <ul class="$(kind=='Topics' and '' or 'nowrap'"> <li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li> <li><a href="../examples/sipscan.lua.html">sipscan.lua</a></li> <li><a href="../examples/symbols.lua.html">symbols.lua</a></li> <li><a href="../examples/test-cmp.lua.html">test-cmp.lua</a></li> <li><a href="../examples/test-data.lua.html">test-data.lua</a></li> <li><a href="../examples/test-listcallbacks.lua.html">test-listcallbacks.lua</a></li> <li><a href="../examples/test-pretty.lua.html">test-pretty.lua</a></li> <li><a href="../examples/test-symbols.lua.html">test-symbols.lua</a></li> <li><a href="../examples/testapp.lua.html">testapp.lua</a></li> <li><a href="../examples/testclone.lua.html">testclone.lua</a></li> <li><a href="../examples/testconfig.lua.html">testconfig.lua</a></li> <li><a href="../examples/testglobal.lua.html">testglobal.lua</a></li> <li><a href="../examples/testinputfields.lua.html">testinputfields.lua</a></li> <li><a href="../examples/testinputfields2.lua.html">testinputfields2.lua</a></li> <li><a href="../examples/testxml.lua.html">testxml.lua</a></li> <li><a href="../examples/which.lua.html">which.lua</a></li> </ul> </div> <div id="content"> <h1>Module <code>pl.input</code></h1> <p>Iterators for extracting words or numbers from an input source.</p> <p> <pre> <span class="global">require</span> <span class="string">'pl'</span> <span class="keyword">local</span> total,n = seq.sum(input.numbers()) <span class="global">print</span>(<span class="string">'average'</span>,total/n) </pre> <p> <em>source</em> is defined as a string or a file-like object (i.e. has a read() method which returns the next line)</p> <p> See <a href="../manual/06-data.md.html#Reading_Unstructured_Text_Data">here</a></p> <p> Dependencies: <a href="../libraries/pl.utils.html#">pl.utils</a></p> </p> <h2><a href="#Functions">Functions</a></h2> <table class="function_list"> <tr> <td class="name" nowrap><a href="#alltokens">alltokens (getter, pattern[, fn])</a></td> <td class="summary">create an iterator over all tokens.</td> </tr> <tr> <td class="name" nowrap><a href="#create_getter">create_getter (f)</a></td> <td class="summary">create a function which grabs the next value from a source.</td> </tr> <tr> <td class="name" nowrap><a href="#numbers">numbers (f)</a></td> <td class="summary">generate a sequence of numbers from a source.</td> </tr> <tr> <td class="name" nowrap><a href="#words">words (f)</a></td> <td class="summary">generate a sequence of words from a source.</td> </tr> <tr> <td class="name" nowrap><a href="#fields">fields (ids, delim, f, opts)</a></td> <td class="summary">parse an input source into fields.</td> </tr> </table> <br/> <br/> <h2><a name="Functions"></a>Functions</h2> <dl class="function"> <dt> <a name = "alltokens"></a> <strong>alltokens (getter, pattern[, fn])</strong> </dt> <dd> create an iterator over all tokens. based on allwords from PiL, 7.1 <h3>Parameters:</h3> <ul> <li><span class="parameter">getter</span> <span class="types"><span class="type">func</span></span> any function that returns a line of text </li> <li><span class="parameter">pattern</span> <span class="types"><a class="type" href="http://www.lua.org/manual/5.2/manual.html#6.4">string</a></span> </li> <li><span class="parameter">fn</span> <span class="types"><a class="type" href="http://www.lua.org/manual/5.2/manual.html#6.4">string</a></span> Optionally can pass a function to process each token as it's found. (<em>optional</em>) </li> </ul> <h3>Returns:</h3> <ol> an iterator </ol> </dd> <dt> <a name = "create_getter"></a> <strong>create_getter (f)</strong> </dt> <dd> create a function which grabs the next value from a source. If the source is a string, then the getter will return the string and thereafter return nil. If not specified then the source is assumed to be stdin. <h3>Parameters:</h3> <ul> <li><span class="parameter">f</span> a string or a file-like object (i.e. has a read() method which returns the next line) </li> </ul> <h3>Returns:</h3> <ol> a getter function </ol> </dd> <dt> <a name = "numbers"></a> <strong>numbers (f)</strong> </dt> <dd> generate a sequence of numbers from a source. <h3>Parameters:</h3> <ul> <li><span class="parameter">f</span> A source </li> </ul> <h3>Returns:</h3> <ol> An iterator </ol> </dd> <dt> <a name = "words"></a> <strong>words (f)</strong> </dt> <dd> generate a sequence of words from a source. <h3>Parameters:</h3> <ul> <li><span class="parameter">f</span> A source </li> </ul> <h3>Returns:</h3> <ol> An iterator </ol> </dd> <dt> <a name = "fields"></a> <strong>fields (ids, delim, f, opts)</strong> </dt> <dd> parse an input source into fields. By default, will fail if it cannot convert a field to a number. <h3>Parameters:</h3> <ul> <li><span class="parameter">ids</span> a list of field indices, or a maximum field index </li> <li><span class="parameter">delim</span> <span class="types"><a class="type" href="http://www.lua.org/manual/5.2/manual.html#6.4">string</a></span> delimiter to parse fields (default space) </li> <li><span class="parameter">f</span> a source @see create_getter </li> <li><span class="parameter">opts</span> <span class="types"><span class="type">tab</span></span> option table, <code>{no_fail=true}</code> </li> </ul> <h3>Returns:</h3> <ol> an iterator with the field values </ol> <h3>Usage:</h3> <ul> <pre class="example"><span class="keyword">for</span> x,y <span class="keyword">in</span> fields {<span class="number">2</span>,<span class="number">3</span>} <span class="keyword">do</span> <span class="global">print</span>(x,y) <span class="keyword">end</span> -- <span class="number">2</span>nd <span class="keyword">and</span> <span class="number">3</span>rd fields from stdin</pre> </ul> </dd> </dl> </div> <!-- id="content" --> </div> <!-- id="main" --> <div id="about"> <i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.3</a></i> <i style="float:right;">Last updated 2015-03-21 18:49:03 </i> </div> <!-- id="about" --> </div> <!-- id="container" --> </body> </html>