<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <link rel="stylesheet" href="style.css" type="text/css"> <meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"> <link rel="Start" href="index.html"> <link rel="next" href="Js.Optdef.html"> <link rel="Up" href="Js.html"> <link title="Index of types" rel=Appendix href="index_types.html"> <link title="Index of exceptions" rel=Appendix href="index_exceptions.html"> <link title="Index of values" rel=Appendix href="index_values.html"> <link title="Index of class methods" rel=Appendix href="index_methods.html"> <link title="Index of class types" rel=Appendix href="index_class_types.html"> <link title="Index of modules" rel=Appendix href="index_modules.html"> <link title="Index of module types" rel=Appendix href="index_module_types.html"> <link title="CSS" rel="Chapter" href="CSS.html"> <link title="Dom" rel="Chapter" href="Dom.html"> <link title="Dom_events" rel="Chapter" href="Dom_events.html"> <link title="Dom_html" rel="Chapter" href="Dom_html.html"> <link title="Event_arrows" rel="Chapter" href="Event_arrows.html"> <link title="File" rel="Chapter" href="File.html"> <link title="Firebug" rel="Chapter" href="Firebug.html"> <link title="Form" rel="Chapter" href="Form.html"> <link title="Js" rel="Chapter" href="Js.html"> <link title="Json" rel="Chapter" href="Json.html"> <link title="Lwt_js" rel="Chapter" href="Lwt_js.html"> <link title="Regexp" rel="Chapter" href="Regexp.html"> <link title="Url" rel="Chapter" href="Url.html"> <link title="XmlHttpRequest" rel="Chapter" href="XmlHttpRequest.html"><title>Js.Opt</title> </head> <body> <div class="navbar"> <a href="Js.html">Up</a> <a href="Js.Optdef.html">Next</a> </div> <center><h1>Module <a href="type_Js.Opt.html">Js.Opt</a></h1></center> <br> <pre><span class="keyword">module</span> Opt: <code class="type"><a href="Js.OPT.html">OPT</a></code><code class="type"> with type 'a t = 'a opt</code></pre>Standard functions for manipulating possibly null values.<br> <hr width="100%"> <pre><span id="TYPEt"><span class="keyword">type</span> <code class="type">'a</code> t</span> </pre> <pre><span id="VALempty"><span class="keyword">val</span> empty</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a></code></pre><div class="info"> No value.<br> </div> <pre><span id="VALreturn"><span class="keyword">val</span> return</span> : <code class="type">'a -> 'a <a href="Js.OPT.html#TYPEt">t</a></code></pre><div class="info"> Consider a value as an optional value.<br> </div> <pre><span id="VALmap"><span class="keyword">val</span> map</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> ('a -> 'b) -> 'b <a href="Js.OPT.html#TYPEt">t</a></code></pre><div class="info"> Apply a function to an optional value if it is available. Returns the result of the application.<br> </div> <pre><span id="VALbind"><span class="keyword">val</span> bind</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> ('a -> 'b <a href="Js.OPT.html#TYPEt">t</a>) -> 'b <a href="Js.OPT.html#TYPEt">t</a></code></pre><div class="info"> Apply a function returning an optional value to an optional value<br> </div> <pre><span id="VALtest"><span class="keyword">val</span> test</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> bool</code></pre><div class="info"> Returns <code class="code">true</code> if a value is available, <code class="code">false</code> otherwise.<br> </div> <pre><span id="VALiter"><span class="keyword">val</span> iter</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> ('a -> unit) -> unit</code></pre><div class="info"> Apply a function to an optional value if it is available.<br> </div> <pre><span id="VALcase"><span class="keyword">val</span> case</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> (unit -> 'b) -> ('a -> 'b) -> 'b</code></pre><div class="info"> Pattern matching on optional values.<br> </div> <pre><span id="VALget"><span class="keyword">val</span> get</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> (unit -> 'a) -> 'a</code></pre><div class="info"> Get the value. If no value available, an alternative function is called to get a default value.<br> </div> <pre><span id="VALoption"><span class="keyword">val</span> option</span> : <code class="type">'a option -> 'a <a href="Js.OPT.html#TYPEt">t</a></code></pre><div class="info"> Convert option type.<br> </div> <pre><span id="VALto_option"><span class="keyword">val</span> to_option</span> : <code class="type">'a <a href="Js.OPT.html#TYPEt">t</a> -> 'a option</code></pre><div class="info"> Convert to option type.<br> </div> </body></html>