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<h1>Penlight</h1>
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<h2>Contents</h2>
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<li><a href="#Functions">Functions</a></li>
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<h2>Modules</h2>
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<li><a href="../modules/pl.html">pl</a></li>
<li><a href="../modules/pl.Date.html">pl.Date</a></li>
<li><a href="../modules/pl.List.html">pl.List</a></li>
<li><strong>pl.Map</strong></li>
<li><a href="../modules/pl.MultiMap.html">pl.MultiMap</a></li>
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<h2>Topics</h2>
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<li><a href="../topics/01-introduction.md.html">01-introduction.md</a></li>
<li><a href="../topics/02-arrays.md.html">02-arrays.md</a></li>
<li><a href="../topics/03-strings.md.html">03-strings.md</a></li>
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<h2>Examples</h2>
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<li><a href="../examples/seesubst.lua.html">seesubst.lua</a></li>
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<h1>Module <code>pl.Map</code></h1>
<p>A Map class.</p>
<p><pre><code>&gt; Map = require 'pl.Map'
&gt; m = Map{one=1,two=2}
&gt; m:update {three=3,four=4,two=20}
&gt; = m == M{one=1,two=20,three=3,four=4}
true
</code></pre>
<p> Dependencies: <a href="../modules/pl.utils.html#">pl.utils</a> , <a href="../modules/pl.class.html#">pl.class</a> , <a href="../modules/pl.tablex.html#">pl.tablex</a> , <a href="../modules/pl.pretty.html#">pl.pretty</a> </p>
</p>
<h2><a href="#Functions">Functions</a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#Map:iter">Map:iter&nbsp;()</a></td>
<td class="summary">return an iterator over all key-value pairs.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#Map:items">Map:items&nbsp;()</a></td>
<td class="summary">return a List of all key-value pairs, sorted by the keys.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#Map:len">Map:len&nbsp;()</a></td>
<td class="summary">size of map.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#Map:set">Map:set&nbsp;(key, val)</a></td>
<td class="summary">put a value into the map.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#Map:get">Map:get&nbsp;(key)</a></td>
<td class="summary">get a value from the map.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#Map:getvalues">Map:getvalues&nbsp;(keys)</a></td>
<td class="summary">get a list of values indexed by a list of keys.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#Map:update">Map:update&nbsp;(table)</a></td>
<td class="summary">update the map using key/value pairs from another table.</td>
</tr>
</table>
<h2><a href="#Fields">Fields</a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#keys">keys</a></td>
<td class="summary">list of keys.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#values">values</a></td>
<td class="summary">list of values.</td>
</tr>
</table>
<br/>
<br/>
<h2><a name="Functions"></a>Functions</h2>
<dl class="function">
<dt>
<a name = "Map:iter"></a>
<strong>Map:iter&nbsp;()</strong>
</dt>
<dd>
return an iterator over all key-value pairs.
</dd>
<dt>
<a name = "Map:items"></a>
<strong>Map:items&nbsp;()</strong>
</dt>
<dd>
return a List of all key-value pairs, sorted by the keys.
</dd>
<dt>
<a name = "Map:len"></a>
<strong>Map:len&nbsp;()</strong>
</dt>
<dd>
size of map.
note: this is a relatively expensive operation!
</dd>
<dt>
<a name = "Map:set"></a>
<strong>Map:set&nbsp;(key, val)</strong>
</dt>
<dd>
put a value into the map.
<h3>Parameters:</h3>
<ul>
<li><code><em>key</em></code>: the key</li>
<li><code><em>val</em></code>: the value</li>
</ul>
</dd>
<dt>
<a name = "Map:get"></a>
<strong>Map:get&nbsp;(key)</strong>
</dt>
<dd>
get a value from the map.
<h3>Parameters:</h3>
<ul>
<li><code><em>key</em></code>: the key</li>
</ul>
<h3>Returns:</h3>
<ol>
the value, or nil if not found.
</ol>
</dd>
<dt>
<a name = "Map:getvalues"></a>
<strong>Map:getvalues&nbsp;(keys)</strong>
</dt>
<dd>
get a list of values indexed by a list of keys.
<h3>Parameters:</h3>
<ul>
<li><code><em>keys</em></code>: a list-like table of keys</li>
</ul>
<h3>Returns:</h3>
<ol>
a new list
</ol>
</dd>
<dt>
<a name = "Map:update"></a>
<strong>Map:update&nbsp;(table)</strong>
</dt>
<dd>
update the map using key/value pairs from another table.
<h3>Parameters:</h3>
<ul>
<li><code><em>table</em></code>:
</li>
</ul>
</dd>
</dl>
<h2><a name="Fields"></a>Fields</h2>
<dl class="function">
<dt>
<a name = "keys"></a>
<strong>keys</strong>
</dt>
<dd>
list of keys.
</dd>
<dt>
<a name = "values"></a>
<strong>values</strong>
</dt>
<dd>
list of values.
</dd>
</dl>
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